Characters / Ready Jet Go! - Main Characters

Ready Jet Go! character index
Main Characters | Bortronians | Earthies

The gang's (mostly) all here!^note From left to right: Carrot, Celery, Jet, Sydney, Sean, Sunspot, and Mindy. Not pictured: Face 9000

Jet, Sean, Sydney, Mindy, Sunspot, Carrot, Celery, and Face 9000, also known as Team Propulsion or the "Core Eight", are the main characters of the show.

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As a Whole

• Adorably Precocious Child: All of the kids are exceptionally intelligent for their age, thanks to their parents being astronomers (or in Jet's case, intergalactic travel writers). Dr. Bergs compliments Jet's knowledge of space in "Visit to Mom's Office." They also act quite responsible, though they still do have their immature moments.
• Affectionate Gesture to the Nose: Nose-booping is a common way the members of Team Propulsion show affection within their group. The Propulsions all have Gag Noses that squeak or honk when booped. Celery does this to Carrot in "How Come the Moon Changes Shape?" and Sunspot does this to Jet in "Mindy's Mystery." Jet also boops Sydney's nose during the "That's How We Roll On Bortron 7" song in "Back to Bortron 7." In "Earth, Wind, and Flyer," Jet's saucer has a nose-booping function of all things, and it boops Sean's nose.
• Alien Among Us: The Propulsion family, unbeknownst to their Earthie neighbors, are aliens.
• Alien Arts Are Appreciated: Carrot watches an Earth cooking show in "What's a Satellite?" and Jet is a fan of Commander Cressida.
• Aliens Love Human Food: All of the Propulsions, but especially Jet, are obsessed with human food. In Jet's case, he especially loves pie.
• Amusing Alien: The entire Propulsion family, who are very wacky and don't quite understand Earth.
• Badass Crew:
  • Certainly have been this at times, most notably in "Back to Bortron 7", where Jet, Sean, and Sydney save Carrot and Celery's presentation, Face 9000 and Sunspot rescue the PowerCube, and Mindy (along with Jet 2) somehow cause an eclipse that distracts the townspeople and Mitchell from seeing the Propulsion house land back on Earth.
  • In Space Camp, they successfully avoid a black hole and retrieve the deshrinkulum in time to save Sunspot.
• Befriending the Enemy: Jet, Sean, Sydney, and Mindy go on to befriend the jerk loner Mitchell, who always spies on them and tries to find proof that Jet is an alien.
• Cheerful Child: All four kids are cheerful most of the time.
• Child Prodigy: For their age, the kids know a lot about science, and they each count as prodigies to varying degrees:
  • Jet has repaired a satellite, named all the moons of Jupiter, quickly calculated how many Earths could fit inside the sun, built his own flying saucer, and has even built a working time machine! He's also only around 10.
  • At least justified with Sean, as his mom is a scientist who works at the space program.
  • Sydney knows tons of Greek mythology
• Color-Coded Characters:
  • Blue for Jet, Carrot, and Celery.
  • Grey for Sydney.
  • Green for Sean.
  • Orange for Mindy and Sunspot.
  • Face 9000 is represented by blue or violet.
• Comic Trio: Jet, Sean, and Sydney. Jet comes up with crazy ideas, Sydney eagerly follows, and Sean is the hesitant one.
• Cosmic Motifs: Fitting with the show's astronomy theme, the main characters are all associated with Earth's moon.
  • Jet's first mission with the Super Saucer is to go to Earth's moon, where he and Sunspot build a mini-golf course.
  • Sean idolizes Neil Armstrong, the first man on the moon.
  • In "Earth Mission to Moon", Sydney becomes the first girl on the moon, plus her shirt is silver like the moon.
  • In "Mindy Turns Five", the first place Mindy goes to when she goes to space for the first time is the moon.
  • Carrot and Celery have a love song called "Let's Fly Our Little Saucer to the Moon".
• Fish out of Water: Jet, Carrot, and Celery, who are Human Aliens that are trying to fit into Earthie society.
• Four-Philosophy Ensemble: The main cast of kids fit into this.
  • The Cynic: Sean. He's usually the most logical of the group and doesn't always agree with Jet's ideas. However, this is downplayed, as Sean is not as mean as most examples.
  • The Optimist: Jet. He's a Genki Guy who always looks on the bright side of things and sees the good in everyone.
  • The Realist: Sydney. She usually meditates between Jet and Sean's differences and balances them out, often acting as the Team Mom towards them.
  • The Apathetic: Mindy. Being a little kid, she just doesn't care either way.
  • If Mitchell is involved, then he'll be either The Cynic, The Apathetic, or The Conflicted (he's not only morally complicated, but he was also insecure about fitting in with the group).
• Four-Temperament Ensemble: The children fit into this archetype, while also subtly representing the different stages of emotional development.
  • Jet (Sanguine) is transcendent. Given that he is not a human, he is "built differently", so to speak, and loves the Earth unconditionally. He is kind and loving to a fault, and is the happiest and bubbliest of the gang.
  • Sean (Melancholic) is group-dependent. A traditional perfectionist, Sean is a go-getter who looks out for the rest of the team, being cautious and wary during space missions. Sean is prone to bouts of anxiety and illness. Sean has tried to work alone in "Sean's Year in Space" and "Sounds Abound", but in both instances, it is proven that he cannot be successful without the assistance of the rest of the team.
  • Sydney (Phlegmatic) is independent. Serene, trustworthy, and benevolent. Sydney acts as the Team Mom, and compared to the Eccentric Townsfolk of Boxwood Terrace, Sydney is relatively well-adjusted (which isn't saying much). She's the heart of the team, acting as their moral compass. When Jet isn't leading the team, Sydney takes on the leader role, like in "A Star is Born" and "Backyard Moon Base".
  • Mindy (Choleric) is codependent. Given that Mindy is the youngest of the gang, she relies on them for knowledge and support. Early on in the show, Mindy couldn't go anywhere past Jet's yard without the older children accompanying her, but later on, her boundaries are expanded and she finally goes to space in Season 2. As children tend to be, Mindy is inquisitive and excitable, but also brutally honest, sarcastic, and impulsive, because she does not know any better. Mindy is eager to be a big girl, but needs guidance from other characters
• Free-Range Children: The kids are always allowed to go wherever by themselves. They do have adult supervision in space, though.
• Freudian Trio: Jet, Sean, and Sydney.
  • Sydney is the Id. Unlike Sean, Sydney wants to become a successful science fiction author and is more into science fiction and Greek mythology. She is also more emotional, kind, and loving than any of the group.
  • Sean is the Superego. Sean is studious and smart, and wants to grow up to be a great scientist and lead the first human mission to Mars. Sean is also concerned about his grades most of the time and uses the Scientific Method, as well as logical reasoning, to solve problems. Due to this, he has a terrible imagination.
  • Jet is the Ego. While Sean and Sydney are polar opposites, Jet is one of the sole reasons why they hang together and the arrival of Jet pretty much brought them together. Jet is talented at acting, singing, and dancing, and is curious about everything, especially Earth. Jet is also kind and generous, and always has a positive attitude and great leadership skills.
• Hidden in Plain Sight: The Propulsions coincidentally look like humans, which allows them to hide in plain sight on Earth easily without anyone discovering their secret alien identity.
• Human Aliens: Jet, Carrot, and Celery look like humans, but are actually aliens.
• Humans Through Alien Eyes:
  • Jet and his family do not seem to get the Earthlings' behaviors and vocabulary, often using them the wrong way. Once, Carrot was shown mowing the roof.
  • In the first Halloween 2-parter, Carrot and Celery thought that Valentine's Day decorations were acceptable Halloween decorations.
• Innocent Aliens: The Propulsions are a particularly sweet family of aliens.
• Intergenerational Friendship:
  • Jet, Sean, and Sydney (preteens) are all friends with Mindy (preschooler).
  • Carrot (adult) and Mindy (child) have a close bond.
• Interspecies Friendship: The Propulsion family all have a very close bond with Sydney, Sean, and Mindy.
• It Runs in the Family: It's implied that the craziness of the Propulsions might be a familial trait. To wit: Celery has a habit of leaving Carrot in certain places, Carrot himself once got his head stuck in a vacuum, Jet's endless stream of crazy ideas, and that Uncle Zucchini once lost his saucer in a parking lot (mentioned in "A Visit From Uncle Zucchini.")
• Klingons Love Shakespeare: The Propulsions adore Earth pop culture, food, and holidays. For example, in "Which Moon is Best?" Celery makes a reference to Fred Astaire. Discussed in "Bortron Leprechaun" when Mindy remarks that the Propulsions really love Earth holidays like St. Patrick's Day.
• Odd Friendship:
  • Jet, an eccentric alien, has one with Sean (a neurotic science nerd), Sydney (a sci-fi geek and fanfic writer), and Mindy (a little girl).
  • You'd hardly expect Sean and Sydney to get along considering how different their interests are, but they do.
• Quirky Household: The Propulsion family, who do many odd things. They also all have an unironic love of failure, cannot keep their alien identities secret, are perpetually enthusiastic, and, according to Word of God, wake up each day having forgotten previous events.
• Ragtag Bunch of Misfits: A quirky, hyperactive alien kid and his parents, a strange alien pet who can do anything and everything, a computer with a face, a comic-book geek, an uptight science nerd, and a little girl. And yet somehow they all came together and have a strong, family-like bond, and when it's called for, they more often than not save the day. Yep, they definitely fit the bill. Whichever side character(s) joins them for their adventures can easily fit into the group as well.
• Rubber-Forehead Aliens: The Propulsions would be just like actual humans if not for their stretchy bodies and space-suits.
• Secret-Keeper: Sean, Sydney, and Mindy all keep the secret that the Propulsions are aliens.
• Shared Family Quirks: Jet, Carrot, and Celery all have a tendency to not keep their identities secret, and to misunderstand certain Earth expressions, sometimes taking them literally.
• Shipper on Deck:
  • The kids love it when Carrot and Celery do something romantic. Not all the time though, as Jet and Sean were grossed out by their flirting in "Sounds Abound".
  • Jet, Sean, and Sydney seem to ship Mitchell/Mindy. This is evidenced when Jet purposefully brought the two of them to the treehouse in the first Halloween special to see the red moon. They also all cheered wildly when Mitchell and Mindy "got together" at the end of "Detective Mindy."
  • Sydney ships Jet 2/Boop as shown in "Mars Rock for Mom", when the two robots formed an implied romantic relationship during Jet 2's time on Mars. She regards their relationship as very sweet.
• Similar Squad: Jet, Sean, Sydney, and Mindy are reflections of Dr. Bergs, Dr. Rafferty, Dr. Skelley, and Mr. Peterson. For more information, visit their individual folders.
• The Smart Guy: Celery, Face 9000, Sean, and sometimes Sunspot all share this role, due to all of them having a wide knowledge of science. Sunspot is often ahead of what anyone else is doing, thinking, or realizing.
• Token Trio: The three main kids: Jet is an alien who disguises himself as a white male; Sean is a human white male, and Sydney is a human black female.
• Trademark Favorite Food:
  • The Propulsions all love the Classic 3-Part Bortronian Meal.
  • Sean loves pot roast.
  • Mindy likes chile rellenos.
  • Sydney likes ratatouille, which her mom makes.
• True Companions: No matter what, all eight of them will forever stick by each other's sides and go to the ends of the universe to make sure they're okay.
• Two of Your Earth Minutes: The Propulsions tend to talk in this manner. For example, in "Jet Cooks Dinner," Celery says that 6 Bortronian months is the equivalent of one Earth hour.
• Undying Loyalty: Sean, Sydney, and Mindy to the Propulsion family. They are devoted to keeping their secret and always stand by them.
• The Unpronounceable: All three members of the Propulsion family have weird strings of sound effects for their Bortronian names.
• Wise Beyond Their Years: The kids act more like young adults than actual children at times.

Bortronians

Jet Propulsion

Jet Propulsion

"If you try and you make a mess, who cares if it's not a success?"

Voiced by: Ashleigh Ball (English), Nam Doh-hyeong (Korean), Dániel Máté Pál (Hungarian), Stefani Villarroel (Spanish; Season 1), Navid Cabrera (Spanish; Season 2), Ruthsy Fuentes (Spanish; Space Camp), Pablo Cherrey (French; Space Camp)

The star of the show. Jet may be a typical kid for Bortron 7, but he's extraordinary to the kids next door. Always curious and fearless, he leaps before he looks. Jet is unafraid of failure- an idea there's no word for on Bortron 7- and you can't get him down. Like the Music Man, he might burst into a song he made up on the spot. He can build anything. Jet is endlessly delighted by our planet, which to him is huge and lush, incredibly varied and beautiful. He often points out the wonders of ordinary things to the Earth kids.

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• Academic Athlete: In Ready Jet Go! Space Camp, he sings about how he's "mentally, and physically fit." He demonstrates this by lifting up a chess board with Sunspot on top of it, and making a move within the game.
• The Ace: He can stretch his body, is really tall, smart, and is the leader of his gang.
• Aerith and Bob: Jet is an uncommon boys' name, but to be fair, his parents thought Jet was a regular Earth name.
• Agent Mulder: In "Fact or Fiction?", where he, along with Mindy and Lillian, believes that clouds are made of cotton candy.
• Airplane Arms: In "Scientific Sean", Jet makes airplane arms when running around and pretending to fly.
• Aliens Speaking English: Jet can speak English well, but Mr. Peterson points out that he has a bit of an accent and thinks that Jet is from Iowa.
• All-Loving Hero: Jet, being new to Earth, loves everything about it, and is nice to everyone, including Mitchell Peterson, who is sometimes rude to him and tries to find out if he's an alien. Heck, he's even nice to Stella Singularity, and forgives her for what she did.
• All of the Other Reindeer: Sean's mom thinks this is why he describes himself as an alien, as she had the same issue when she was younger.
• All Work vs. All Play: The All Play to Sean's All Work. Whenever the kids need to solve a problem, Sean wants to use the Scientific Method and work to get the problem solved, while Jet wants to play around and deliberately make mistakes in order to solve the problem.
• Always Someone Better: In Space Camp, Stella resented him because he took her place as the number one Galacto fan.
• Ambiguously Bi: Jet always shows signs of being attracted to both Sean (a male) and Sydney (a female). He was merely this trope throughout the show itself, as Craig Bartlett revealed after the show ended that Jet is bi and also has No Biological Sex.
• Amusing Alien: Duh.
• Anime Hair: Jet's hair is quite spiky. Seriously, it must take lots of hair gel for his hair to stay up like that. He seems to take great pride in his hair as well, as shown in episodes like "You Can Call Me Albedo", "Detective Mindy", and "Earth, Wind, and Flyer".
• Are You Pondering What I'm Pondering?: Happens in a few episodes between Jet and one other person.
• Attention Deficit... Ooh, Shiny!: Jet is easily distracted. In "Face on the Fritz", he is distracted by an ice cream truck and ends up breaking Sunspot's pet house.
• Bearer of Bad News: In "Project Pluto", Jet loses to Sean and Sydney in a game of "not it" and has to tell Mindy that Pluto is no longer a planet. However, he gets off easy because when he tries to tell her, she tells Jet that she already knew.
• Big Good: Jet is the hero and leader of Team Propulsion, and he teaches the entire town of Boxwood Terrace to think outside the box, be perseverant, and most importantly, love again.
• Big Eater: It seems that every few episodes, he develops a new food obsession. He even lists eating as one of his favorite things in "Treehouse Observatory".
• The Big Guy: Jet is the tallest of the children, is very strong, and can sometimes slip into Badass Adorable territory.
• Big "WHAT?!": In Space Camp, Jet yells "WHAT?" when Face 9000 tells him that Sunspot’s allergic reaction came from the comet dust from when the two when comet surfing.
• Blue Is Calm: While Jet is hyperactive, he can also be peaceful in times of crisis. He also NEVER gets angry...except for when Zerk kept teasing him in "Whole Lotta Shakin'". A few seconds later, Jet lampshades that he never gets mad.
• Break the Cutie: In Space Camp, Jet goes looking for some deshrinkulum in the caverns of Mascarpone, but Sunspot suddenly disappears and then he spills the water bottle that is needed to go with the deshrinkulum. He breaks down crying, a rare moment for someone who is normally The Pollyanna. Fortunately, things get better after that.
• Buffy Speak: Calls the humans "Earthies".
• But Not Too Bi: Jet is never stated to be bi on the show, despite it being indirectly confirmed via Word of Gay. Justified, as this is a PBS show. Due to not being a human, however, it can be hard to say if his sexuality can be categorized at all, although he's definitely shown attraction to multiple genders.
• Camp: Jet positively oozes it. He's an eccentric Large Ham with an exaggerated, theatrical style who loves singing, dancing, and performing on stage, especially rock and big band numbers.
• Cannot Keep a Secret: He's absolutely rubbish at keeping the secret that he's an alien. He also has trouble keeping other secrets too. In "Moon Circus", Jet was unable to keep the secret about the surprise party.
• Category Traitor: In "Whole Lotta Shakin'", it's revealed that Zerk believes that Jet is a sell-out for associating with humans. He denies Jet's clearly alien traits and has the audacity to call him an "Earthie".
• Character Catchphrase:
  • Excelsior! (onward and upward in Latin)
  • "What a funny/amazing Earth word!"
  • "Sunspot, car trip!"
  • "Or is it?" and variations.
• Character Tics: Whenever he walks, he does so with his elbows out as if he's marching. Whenever he's excited, his turns his hands into fists and waves them around, like in "Lone Star 2 - Rocket Kids" and "That's One Gigantic Pumpkin, Jet Propulsion".
• Cheerful Child: Jet sees the good in everything, is a Friend to All Living Things, and is perpetually enthusiastic.
• Child Popstar: Jet often writes and performs his own original songs throughout the series. In "Potatoes on Mars", it's shown that Jet is the lead singer of the band, with Sydney on piano, Sean on drums, Mindy on flugelhorn, and Sunspot on electric guitar. In Space Camp, his song "Dear Great Galacto" becomes a hit song on Bortron 7.
• Clashing Cousins: With Zerk. Zerk is very energetic, a braggart, and a speciesist. Jet, while still hyperactive, isn't as energetic as Zerk, and he is very humble and tolerant of others' differences. Their differences leads to some arguing in "Whole Lotta Shakin'".
• Cloudcuckoolander: He is quite weird and silly.
• Complexity Addiction: Jet loves coming up with convoluted solutions to problems, because he considers those plans to be fun. For example, in "Astronaut Ellen Ochoa", he has a Mundane Made Awesome plan for making lemonade. Also, in "Sydney 2", he and Sean build a Rube Goldberg Device just to deliver snacks.
• Cool Big Bro: Even though they're not related, Mindy sees him as one due to just how amazing he is, especially his optimistic outlook on life and spontaneous nature.
• Cool Board: Jet has a sort of surfboard shaped like a rocket that he uses to ride waves in outer space in Space Camp.
• Cuddle Bug: Implied, since he will randomly put his arm around Sean's shoulder at any given time. There's also a few instances where he puts his hand on the latter's back or chest.
• The Cutie: Jet proves to be this trope entirely, with his adorkable tendencies and positive outlook on life.
• Daydream Believer: In "Diggin' Earth", Jet seems to believe that he and his comrades can dig to the center of the Earth just like Commander Cressida and her squad. Sydney reminds him multiple times that Commander Cressida is a made-up story and is not real.
• The Defroster: He can thaw out anyone's heart. His unrelenting kindness towards Mitchell had a positive influence on the latter (until his character development was undone in Space Camp). In Space Camp, after rescuing Stella, who was nothing but rude to him up until this point, she starts being kinder.
• Despair Event Horizon: In Space Camp, it seems like he's lost Sunspot in the caverns, and he falls into a melancholy, thinking that everything is his fault and that Sunspot is gone for good. Luckily, his friends lift his spirits.
• Despair Speech: In Space Camp, when Sean, Sydney, and Mindy find Jet in the cave and say they want to help him, Jet, who has lost all hope, delivers a speech.
  Jet: You can't help. I've messed everything up. I'm no hero. I'm just lost down here. And now I've gotten you lost too, and I've lost my best friend.
• Determinator: No matter what, he always stays optimistic and never gives up. He even has his own song about trying again. Taken further in Space Camp, where he states that he would do anything to save Sunspot, even face a black hole.
• Disco Dan: Jet seems to be fond of notably dated music.
• Ditzy Genius: Jet is an absolute expert on everything space, but he absolutely, definitely, positively cannot keep his alien identity a secret when in public.
• Does Not Like Spam: In "Mindy's Weather Report", Jet reveals that he hates ice cream. This is also a Running Gag on the show.
• Drama Queen:
  • In "Jet's Time Machine", he builds a time machine, and he wants to go back in time because the previous weekend, he ate a delicious pie and forgot to ask for seconds. Then he makes a big deal over it.
    "How could I have been so foolish?"
  • In "Holidays in Boxwood Terrace", while pitching his pageant idea, he gets melodramatic over the prospect of Santa being lost in a blizzard.
• Dub Name Change:
  • Jet Rocket (Russian, Hungarian, Uzbek)
  • Jet Cosmic (Polish)
  • Jet Jet (Latvian)
  • Jet(ro) Power (Finnish)
  • Jet Swing (Hebrew)
• Expy: Sort of. The show was originally developed as Lenny and Nate, with Lenny being a prototype Jet. Craig Bartlett said that Lenny was like a 13-year old Curly. While they are both absolutely nuts, Jet isn't as Ax-Crazy as Curly. In turn, Curly was inspired by a friend of Craig Bartlett in elementary school named Tim Jenson who once jumped onto his desk and sang the entire theme song to Daniel Boone, which Jet would totally do if you take into account his love of music and dancing. However, Jet is also based on Bartlett himself.
• Fanboy: In Space Camp, he is revealed to be a huge fan of a TV show called "Great Galacto," and seems to have based his entire personality and life goals on the title character.
• Fatal Flaw: Being a Leeroy Jenkins. He always leaps before he looks. He also insists on failing multiple times instead of getting things right the first time.
• Fiery Redhead: Jet has auburn hair and is very energetic.
• "Flowers for Algernon" Syndrome: In "My Fair Jet", Jet is tasked to behave like a normal human kid. Sean and Sydney put him through intensive training so he can behave as such, since they're sincerely worried about his alien identity getting exposed to the public. Jet does a relatively good job of behaving like a regular Earth kid, but reverts by the end of the episode, because he uses his jetpack to save Sean and performs a song about how he is Bortronian.
• Foil:
  • To Mindy. Both are the enthusiastic, curious leaders of their respective age groups (Jet for the older kids, and Mindy for the younger kids). Jet is an alien who is the new kid in town, so he is rather naive about how Earth works, in contrast to Mindy, who is a young child but has a rather solid grasp on Earth culture and traditions, most of the time anyway. Another difference lies in their knowledge of space. Jet, being a space alien and having traveling parents, knows a lot about outer space and is always eager to learn more. Mindy often gets things wrong about space, like that the Sun orbits around the Earth and that there are multiple different moons orbiting Earth. Finally, their kindness. Jet is an All-Loving Hero who has astounding patience with jerks like Mitchell and Zerk, and always owns up to his mistakes. Mindy is nice most of the time, but she is rather self-centered, sassy, and sarcastic, doesn't like to admit her mistakes, and always forces Sean to go to space.
  • To his cousin Zerk. Both are young Bortronian children bubbling with energy and a thirst for knowledge. Jet lives on Earth, and while he is peppy and energetic, he knows how to be calm. He is also very humble and doesn't care about being the winner. Finally, Jet is very open-minded and tolerant of others' differences. On the other hand, Zerk is hyperactive almost all the time and is never shown being calm or quiet. Zerk is a huge braggart and likes to be the best at everything he does. Finally, Zerk was outright racist to the humans in "Whole Lotta Shakin'", saying that they don't build very well.
• Forgetful Jones:
  • He, like the rest of the Propulsion family, always forgets not to tell people that he comes from Bortron 7.
  • Jet always needs to Sean to teach him the Scientific Method over and over.
  • In "Mars Rock For Mom", a Running Gag involved him forgetting where he put his objects. This comes to a head when Jet realizes that he left Jet 2 on Mars.
• For Halloween, I Am Going as Myself: In the first Halloween special, Jet dresses up as an alien. And gets away with telling people he is from Bortron 7.
• Gadgeteer Genius: Jet loves inventing. He has built two saucers, a robot, and helped fix a satellite.
• Gag Nose: As shown in "Mindy's Mystery", his nose honks when it is squeezed.
• Genki Guy: Jet is energetic and upbeat, and really positive compared to the cowardly Sean and the condescending Mitchell.
• Gleeful and Grumpy Pairing: Jet is a ray of sunshine who is perpetually optimistic, energetic, and friendly. Sean isn't all that grumpy, but he can be stubborn, a Nervous Wreck, and is prone to bouts of angriness and upsetness.
• Good with Numbers: In "Tour of the Solar System", he quickly calculated that 1.3 million earths could fit inside the sun.
• Gosh Dang It to Heck!: In "Who Messed Up the Treehouse?", Jet says "It's those darn squirrels again!"
• Green-Eyed Monster: In "Jet 2", Jet gets jealous of his robot clone, Jet 2, because Sean and Sydney are playing with the robot and not the real Jet.
• Has a Type: It's subtle, but he seems to have a thing for smart people, (seemingly) no matter if they're male or female. He had a Precocious Crush on Dr. Rafferty, an accomplished scientist at the local Deep Space Array, for a couple of episodes. He has frequent Ship Tease with Sydney, who is quite knowledgeable when it comes to Earth things that Jet doesn't understand and knows a lot about science fiction and Greek mythology. He has Ho Yay with Sean, a Child Prodigy with an obsession for science facts. And strangely, he also seems to have a liking for Mitchell, a wise beyond his years nerd, despite Mitchell's occasional rudeness towards him.
• Hates Being Alone: Jet secretly fears being alone. Even when his parents or friends aren't around, he still usually has someone with him - Sunspot. Jet is a very social person and wants to be friends with everyone. In "My Three Suns", he has a daymare about him being abandoned by Sean and Sydney. He's left all alone in a dark void, and screams in anguish. And in "Jet 2" he gets very upset because he thinks Sean and Sydney don't want to be friends with him anymore.
• Have You Tried Not Being a Monster?: In "My Fair Jet", Sean and Sydney try very hard to get the alien Jet to behave like a human so he can blend in and not risk his true identity being exposed. They try to get him not to be an alien even though that's pretty much impossible, and Jet's alien quirks end up saving the day in the end.
• The Hero: Well, obviously.
• Hero-Worshipper: He idolizes the Great Galacto and wishes to be like him.
• Hidden Depths: Jet turns out to be a great mechanic and singer.
• Humble Hero: He doesn't care whether he wins or loses, he just likes to have fun. He also didn't care about being the number one fan of the Great Galacto.
  Jet: Stella, I just wanna say, I hope you get to be number one Galacto fan again back on Bortron 7.
  Stella: You know, it somehow doesn't matter to me so much now. You can keep the title.
  Jet: Nah. I'm happier being just Jet, best friend of Sunspot.
• Idiot Ball: Jet gets passed this in "Mindy's Weather Report". In that episode, Mindy tells the gang that a storm is on Saturn, and Jet believes that there's a storm in Boxwood Terrace, and tells all the neighbors (including the Petersons) to prepare, despite the number of times Sean, Sydney, and Mindy try to tell Jet that the storm in on Saturn. When the gang goes into space, they see the storm on Saturn and Jet says: "Why didn't you tell me?" with Sean and Sydney in annoyance.
• Idiot Hero: Jet gives off this vibe at times due to him being incredibly naive about Earth, very forgetful, and often jumping into situations without thinking first. However, he's a Ditzy Genius rather than an out-and-out idiot.
• Incorruptible Pure Pureness: While Jet is by no means perfect, he is still an optimistic, kind-hearted kid who sees the good in everyone, and wants to help in any way he can. He's even able to put up with Mitchell's constant spying on him, and (to an extent) Zerk's over-the-top antics.
• Inherently Funny Words: A lot of Earth words, for him, such as "falafel".
• Innocently Insensitive: In "Night of a Bazillion Stars" he takes Sean's birthday telescope just to see how it works and breaks it. He is promptly chewed out by Sydney for this.
• In Touch with His Feminine Side: Jet can get emotional at times, loves theater and dancing, enjoys tea parties, takes great pride in his appearance, and dressed up as a female witch in "Jet's First Halloween".
• It's All My Fault: In Space Camp, he takes Sunspot comet surfing, which triggers an allergic reaction from Sunspot and causes him to shrink. When Jet reaches his Despair Event Horizon, he thinks that everything that happened is his fault.
• I've Heard of That — What Is It?: In "Every Day is Earth Day", Jet says that he loves Earth Day, but then asks what it is.
• Jet Pack: He has a jet pack, which he uses in episodes such as "My Fair Jet" and "Mindy's Moon Bounce House".
• Keet: Like you wouldn't believe. He is perpetually optimistic, always speaks loudly, gets excited over the littlest things, and loves everyone.
• Large and in Charge: Jet is the leader of his group and is tall.
• Large Ham: Very bombastic, full of life and charisma, and enjoys being a Drama Queen and performing complicated musical numbers. The song number in "A Visit to the Planetarium" proves that Jet is this.
  "WE'RE SWIRLING! WE'RE SPINNING! WE'RE SPIRALING NIGHT AND DAY! IN OUR GALAXY, THE MILKY WAY! Good evening, frieeeends!"
• Last-Name Basis: Mr. Peterson calls him by his last name.
• Laughing Mad: In "Detective Mindy", Jet looks for a black hole in the trash can. He puts it over his head and starts laughing like a madman.
• The Leader: Jet is the leader of his group, and is the headstrong type. He's an optimistic Determinator, but his tendencies to leap before looking tend to land him and his friends in hot water on occasion.
• Leeroy Jenkins: His Fatal Flaw is that he acts before thinking. This impulsive behavior has caused trouble for him on many occasions.
• Like Parent, Like Child: As Celery points out in "Moon Circus", Jet and Carrot are very similar. Namely, they're both bad at keeping secrets, and they both love prune juice with lemons.
• Limited Wardrobe: Almost never wears anything else besides his regular spacesuit outfit. However, he does wear a white shirt under his jacket.
• Loved by All: Every single character on the show loves Jet, and he loves them back. His kindness, optimism, and fun-loving goofiness are huge contributing factors. His cousin Zerk often annoys him, but underneath his competitive personality, he truly loves Jet. Mitchell wants to expose Jet's alien identity but comes to respect and befriend him over the course of the show. In Space Camp, Stella was jealous of him and wanted to take him down, but they end up becoming good friends, and Stella even makes a song dedicated to praising Jet.
• The Mad Hatter: Jet is a huge Cloudcuckoolander and enjoys every minute of it. He creates odd inventions, sings silly songs, prepares odd dishes, talks in an eccentric English, does strange dances, is perpetually optimistic and upbeat, and adores everyone.
• Magnetic Hero: Jet is beloved by everyone in Boxwood Terrace for his kindness and quirkiness. He became friends with Sean and Sydney the moment he met them. He's everything they both ever wanted, plus he's a literal space alien and can take them to Pluto in nine minutes flat. Mindy also sees him as a Cool Big Bro. The adults appreciate Jet for his optimism, creativity, and knowledge of space, and he has helped them with many problems. The other citizens of Boxwood Terrace idolize him, and even Mitchell grows to respect him by the end of the show, despite stalking him and trying to expose his alien identity. However, he also deconstructs the trope. Jet is a lovable kid who attracts friends naturally, but he can't stand to be apart from anyone. Even if he's on his own, he's with his loyal pet Sunspot. In "My Three Suns", he has a daymare about him being lost in a void, away from everything and everyone. He is absolutely distressed at this, reflecting his fear of loneliness.
• Manic Pixie Dream Guy: He's a quirky and optimistic alien kid who brightens the lives of his friends with his kindness, positivity, and adventures in space.
• Meaningful Appearance: Jet's vibrant red hair is a Shout-Out to the conspiracy theory that redheads are aliens. His grey eyes highlight his supernatural, mystical background. Finally, his blue spacesuit coincides with his heroism and calmness in situations where others would get mad.
• Meaningful Name: Jet is named after the Jet Propulsion Laboratory, who helps out with this show. In addition, his last name, Propulsion, means "the action of pushing or moving something forward".
• Moe Couplet: Jet and Sean bring out the best in each other whenever they work together. Jet's excitable nature highlights Sean's hard-work ethic.
• Mondegreen Gag: Jet mishears "habitable" as "habit-a-bubble" in "Everyday is Earth Day".
• Mr. Fixit: Jet is pretty handy with tools, as he was able to fix the satellite in "What's a Satellite?". He even built an entire saucer in "One Small Step".
• Mundane Object Amazement: Jet is constantly fascinated by the most simple of Earth objects, such as drinking fountains (as shown in "Visit to Mom's Office"), much to the confusion of the other children.
• My God, What Have I Done?: In Space Camp, Jet is horrified that his comet-surfing shenanigans triggered Sunspot’s allergies and caused him to shrink.
• Never Tell Me the Odds!: In Space Camp, Face tells Jet that getting the deshrinkulum is not possible, but Jet angrily tells him not to say that, because he believes that he can still retrieve it.
• Nice Guy: He doesn't have a bad bone in his body. (If he even does, since he's so stretchy).
• Nice Job Breaking It, Hero: In "Moon Circus", Jet gets a moment of this when he blabs out loud that the kids planning a surprise party for Carrot, unaware that Carrot is listening.
• No Biological Sex: Word of God says that Bortronians are technically neither male nor female, but they use pronouns like he/him or she/her for convenience's sake. It's significant in Jet's case because even though he presents as male, he has a female voice, is In Touch with His Feminine Side, and was a Wholesome Crossdresser in the first Halloween Episode.
• No Listening Skills: Jet isn't a very attentive listener, something that causes problems in numerous episodes. In "Mindy's Weather Report", he didn't listen to the others about the supposed storm actually being on Saturn, and drove Boxwood Terrace into a frenzy. In "What's Up With Saturn's Rings?", he didn't listen to Sean's lecture on the rings of Saturn, mistaking it for ice cream sundaes, Cincinnati, or sautéed sausages.
• Non-Human Non-Binary: As a Bortronian, Jet is neither male nor female, but he passes as a boy and uses he/him pronouns. Besides that, he doesn't give a flying feather about gender, which was implied by Bartlett to be one major reason why Jet is bi.
• Numerological Motif: Jet is 63 years old in Bortronian years. 63 is a number that represents humanitarianism, family, and idealism. It is a number of harmony and tolerance. This fits Jet because he loves his family very much, and is optimistic, compassionate, and accepting of differences.
• Obsessed with Food: Jet loves food and is a major Big Eater. He always seems to have food on his mind. He even considered wishing for every marshmallow in the world in "Bortron Leprechaun".
• Odd Name Out: He and Zerk are the only members of their family that don't have vegetable names.
• Older Than They Look: While he's implied to be of equivalent age to his human peers, Jet is several decades older than them going by his home planet's years.
• O.O.C. Is Serious Business: In Space Camp, Sydney, Mindy, and Sean are deeply concerned that Jet doesn't want to go to Space Camp, since he loves space. He was trying to build an engine that would take him to Mascarpone and didn't want to tell the others because he wanted to protect them.
• Pink Girl, Blue Boy: He's the blue boy, and his opposite, Stella, is the pink girl.
• The Pollyanna: You can't get him down, and he always finds a solution for the problems the kids face. Even in the direst situations, he keeps a smile on his face. At least until Space Camp, where he goes through a Break the Cutie moment. It doesn't last long.
• Positive Friend Influence: Jet is a positive influence on everyone he meets and befriends throughout the course of the show. He helps Sean be more open to making mistakes, encourages Sydney to think outside the box, strengthens Mindy's leadership skills, helps Mitchell come out of his shell, and inspires a sense of wonder and childlike joy in the DSA scientists.
• Precocious Crush:
  • It's really easy to think that Jet has a crush on Sean's mom as of "Visit to Mom's Office". When he first sees her, he immediately gives her a big hug (Sean's mom looks surprised, Sean looks annoyed, and Sydney looks sad, since she has frequent ship tease with Jet and possibly likes him), and even calls her "Dr. Sean's Mom" even though he knows that their last name is Rafferty. He is later seen smiling widely at her and raising his eyebrows trying to catch her attention, which also made Sydney upset. To top it off, he seemed all too excited to tell her that he is from Bortron 7. This crush can also be seen in other episodes. In "Ice Moon Enceladus", when Dr. Rafferty is passing by Sean's snow cone stand, Jet immediately greets her, even though she ignores him, and in "Mindy's Meteorite Stand", when Dr. Rafferty was inspecting Mindy's "meteorite", Jet also looked through a magnifying glass to impress her.
  • In the episode "Asteroid Patrol", Sean's telescope needs adjusting and Jet happily offers to go to Sean's house to get some items. Of course, when he sees Sean's mom, he acts awkward around her.
  • In "Face on the Fritz", Jet plays with Dr. Rafferty's phone and then gives it back to her in embarrassment.
• Pun: In "Our Sun is a Star!", when Jet lifts his sunglasses up and down so it appears that Mitchell is turning orange and then back to his normal color, he says this: "Orange you glad you're not permanently orange?".
  • However, this crush eventually disappeared and is never brought up again.
• Really 700 Years Old: Well, more like "Really Several Decades Old" but Jet is 63 (Bortronian) years old; much older than his human friends. However, he's the same age as them in human years.
• Red Oni:
  • Jet is the Red Oni to Sean's Blue Oni. Jet is extroverted, optimistic, and always leaps before he looks. This has caused trouble for him from time to time. Sean is more nervous, intellectual, and calm. During Sean's dream sequence in "Back to Bortron 7", Jet even stands in front of a red sphere and holds a pink one, while Sean stands in front of a blue one and holds a purple one. However, Jet can also be the Blue Oni to Sean's Red Oni, because Sean is more prone to panicking under pressure and being annoyed than Jet is.
  • Jet could also be considered to the Red Oni to Sydney's Blue Oni. Jet is very hyperactive and impulsive, while Sydney to more down to earth, patient, and wise.
• Rule of Symbolism: Jet is the coolest kid ever, and an ambassador for space. Jet embodies what the other children represent. Jet is creative, and being from outer space, and having travel-doc parents, he knows a whole lot about it, and he's very curious to learn about Earth and its customs. Jet also represents how the creators of this show want the target audience to see Earth: with a sense of curiosity and wonder. Jet is continuously amazed by our lush and beautiful planet, and as such, wants to protect it, since it is his current residence. The episode "Tiny Blue Dot" proves this.
• Running Gag:
  • Jet proclaiming ordinary words to be funny or amazing.
  • Also, Jet being awkward and goofy all the time, and often trying not to expose his identity.
• Secret Identity: The Propulsions are secretly aliens from the planet Bortron 7, and are trying to keep a low profile on Earth or else they could become celebrities, and Jet would never get to play with his friends again (as pointed out in "Visit to Mom's Office"). Their alien identities are only known to Sydney, Sean, and Mindy, and Mitchell who is secretly out to expose them.
• Ship Tease: With both Sydney and Sean, most of the time.
  • Sydney and Jet danced together at the end of "How Come the Moon Changes Shape?", and Sydney hugged him in "Kid Kart Derby". Also, in "Tour of the Solar System", Sydney asks why she was chosen to be Venus, and Jet says that Venus "is the brightest planet in the sky." Venus is also the goddess of love. Then, they skated together on one of Saturn's rings in "What's Up With Saturn's Rings?".
    • They nearly held hands at one point in the Just Add Water number in "Back to Bortron 7", but Celery obscured the view.
    • Their characters flirt with each other a bit in the Lone Star duology. In "Lone Star 2 - Rocket Kids", Western!Sydney gets flustered when Western!Jet is about to sing.
    • In the Christmas Episode, Jet casts Sydney as Mrs. Claus in the pageant. Sydney then says "Sounds good, Mr. Claus", in a very flirty tone.
    • In "Mindy's Ice Rink", Jet dances with Sydney during the "Ice Skating in July" song.
  • However, Jet has much more ship tease with Sean. Jet likes to be affectionate with Sean all the time, and is always the first one to motivate him to go on a space mission.
    • In "Back to Bortron 7", where Sean has a dream where he sings a soft duet with Jet. Just him and Jet are in the dream, and no one else. They hold glowing orbs, look at each other, and smile. Sean sings about how he may like Bortron 7. Sean smiles after he wakes up from the dream. Worth mentioning that the song contains the colors of the bisexual pride flag (pink, purple and blue).
    • Multiple times in Season 2, Jet lovingly calls Sean "Sean-zo". Sean is also the only person Jet has a nickname for. Sean likes it when he's called that, and has embraced the nickname as his own as of "Magnet, PI". Sean also visibly dislikes it when Mindy, who's female, calls him "Sean-zo" in "Mindy's Bedtime".
    • In "Eye in the Sky", Jet is in awe at Sean's Space Scouts uniform. We then get closeups from Jet's perspective of Sean's feet, chest, back, and hat, and tells Sean it's a nice outfit. Later, Jet puts Sean on his shoulders while riding a unicycle.
    • Jet and Sean have danced together a few times: in "From Pluto With Love" and "Mindy's Ice Rink".
• Signature Instrument: In the band, he's the lead singer, and utilizes a microphone when performing. The microphone represents his passion for music, as well as his leadership since a microphone amplifies your voice.
• Signature Laugh: Jet's "HA-HA-HA-ha-HA!"
• Similar Squad: Dr. Bergs is a reflection of Jet. Both Jet and Dr. Bergs are jovial and comedic. They both love pastries and tend to be the most overdramatic of their respective groups. We eventually learn that Dr. Bergs is the descendant of astronomer pioneer Lone Star, who Jet always portrays when Sydney tells tales about Lone Star. However, unlike Jet, Dr. Bergs is not the leader of the DSA scientists.
• Slobs Versus Snobs: "Earth Camping" shows that Jet is the Slob to Mitchell's Snob. Jet is more laid-back and actually loves making mistakes and playing around. Mitchell is more uptight and serious, especially when he chastises Jet for folding the map into a hat.
• Smart People Build Robots: He is quite the child prodigy himself, and is already handy with tools, but he eventually builds his own robot clone called 'Jet 2'.
• Smart People Know Latin: He knows at least some Latin; his catchphrase is "excelsior", which he acknowledges as being Latin for "onward and upward".
• Smart People Play Chess: In Space Camp, during his song-letter to the Great Galacto, Jet proclaims himself to be "mentally and physically fit" while playing chess.
• Stage Magician: In "Who Messed Up the Treehouse?", Jet tries to be a magician to make the trash disappear, with failed results.
• Strong Family Resemblance: Jet strongly resembles both of his parents, due to his spiky, side-swept red hair and blue space-suit. Taking this trope further, Carrot and Celery are Lookalike Lovers.
• Talking to Plants: In "That's One Gigantic Pumpkin, Jet Propulsion!", he tries to sing to his pumpkin to make it grow.
• Tearful Smile: In "Jet Cooks Dinner", the Propulsions begin to miss Bortron 7 and the Classic 3-part Bortronian Meal. After they sing the commercial tune, Jet gets nostalgic about Bortron 7 and starts to cry a little bit, while smiling.
• Trademark Favorite Food: The Propulsions love the Classic 3-Part Bortronian Meal, which consists of a Hoagie, a Figinnuz, and an Exploding Shake. But Jet seems to like it the most. Pie also seems to be pretty popular with him.
• Two of Your Earth Minutes: Tends to speak in this manner.
• Unknown Rival: Jet, for the most part, is unaware of Mitchell spying on him. The only kid who knows about it is Mindy.
• Verbal Backspace: Jet does this a lot.
  • Jet does one in "Space Junk" when he says that he's been to space, and then covers it up by saying that he's seen movies about it.
  Jet: I've been across half the galaxy—(Sydney gives him a "Be Quiet!" Nudge) Oh, I mean, I've watched a lot of Earth movies about space. That's uh—that's what I mean. Never been there. (chuckles weakly)
  • Again in "Beep and Boop's Game".
  Jet: Wow, I thought Earthies (Sunspot gives him a "Be Quiet!" Nudge) I mean, us Earth people, had faster technology.
• What Is This Feeling?: In "Jet 2", Jet builds his own robot clone. Then, he feels bad that Sean and Sydney are spending more time with Jet 2 than with the real Jet. Mindy helps him realize that he is experiencing jealousy for the first time.
  Jet: What does jealous mean? Is that some kind of jelly?
  Mindy: No, silly. Being jealous is feeling bad about being left out of something fun, or wanting something that somebody else has.
  Jet: Huh. Maybe I am a little jealous that Sean and Sydney took Jet 2 to the treehouse instead of staying here with me.
• What the Hell, Hero?: Whenever Jet does something dumb, he is promptly chewed out for it. In "Night of a Bazillion Stars", Sydney calls him out for not thinking about Sean's feelings and messing with his telescope.
• Wholesome Crossdresser: Jet dressed up as a female witch in "Jet's First Halloween". No one except Sean and Sydney knew it was him. Mindy uses she/her pronouns when talking about the witch.
• Wide-Eyed Idealist: One of the defining examples of the trope. Jet is perpetually optimistic and doesn't mind when he makes mistakes, because if you don't fail, you don't learn. He also sees the good in everyone (even Mitchell) and doesn't see how anything can't work out. And, unlike most examples of the trope, Jet's optimism ends up prevailing.
• Wingding Eyes: Jet gets stars in his eyes towards the end of "Lone Star 2 - Rocket Kids!".
• Wink "Ding!": Almost every time Jet winks, a "ding!" sound can be heard.
• Wise Beyond Their Years: As noted by many characters, he is very smart for a kid his age.
• Zany Scheme: Jet is full of crazy plans. Many of them involve either machines, food, or science. In "Astronaut Ellen Ochoa", he comes up with a convoluted method to make lemons into lemonade.

Carrot and Celery Propulsion

Carrot Propulsion and Celery Propulsion

Celery (left) and Carrot (right)

Carrot voiced by: Kyle Rideout (English), Bálint Magyar (Hungarian), Jeon Tae-yeol (Korean), Angel Balam (Spanish), Erick Bohorquez (Spanish; Space Camp)

Celery voiced by: Meg Roe (English), Kim Eun-Ah (Korean), Anna Orosz (Hungarian), Marisol Durán (Spanish), Luisna Castillo (Spanish; Space Camp)

Mr. and Mrs. Propulsion (who go by "typical Earth names" Carrot and Celery) work as intergalactic travel writers, and are here on Earth for a long stay, from which they intend to file many travel stories. Like Jet and all Bortronians, they're cheerful and fearless. As Bortronian travel writers, they follow the Prime Directive: "don't freak out the locals." They also tell Jet to "leave your campsite cleaner than when you found it." However well-intentioned, though, they tend to forget to keep their alien identity a secret and keep telling people that they are from Bortron 7. Carrot and Celery tend to talk in a rather eccentric English, since they just downloaded it when they arrived on Earth. They mix up their metaphors and are always freshly learning Earth habits like shopping for food, taking care of the house, and "mowing the roof."

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Tropes that apply to both

• Accidental Pun: Carrot and Celery think their names are Earth names, but they were likely going for Garrett and Sally, respectively.
• Alien Non-Interference Clause: Carrot and Celery are intergalactic travel writers from the planet Bortron 7. They came to Earth to study it and write reports on it. In "Back to Bortron 7", they state that their number one rule is "don't freak out the locals", which basically means that they can't expose their alien identity to humans or tamper with Earth in any way. Heck, the official PBS description of Carrot and Celery even calls the rule the Prime Directive.
• Aliens Speaking English: They can speak English, albeit eccentrically.
• Amusing Alien: They provide a lot of comedy in the show with their misunderstandings of the human way of things.
• Buffy Speak: They call the humans "Earthies".
• Cannot Keep a Secret: Just like their son, they often forget to keep the secret that they're aliens. They also didn't keep the secret about the surprise party in "Earthday Birthday".
• Character Catchphrase:
  Carrot: You are absolutely the amazing.
  Celery: Right back in your general direction, hon!
  • Before picking up the kids to go space, Celery frequently says "Did someone say…?"
• Cloudcuckoolander: Both of them exhibit very strange behavior. Especially when they Bortronian folk dance.
• Ditzy Genius: They are extremely smart, due to being intergalactic travel writers. But they keep forgetting not to tell people that they come from Bortron 7, and have their share of silly moments.
• Dub Name Change:
  • They will often be renamed in accordance with what the vegetables are called in a specific language. For example, in the Spanish dub, Carrot becomes Zanahoria and Celery becomes Apio. In Space Camp, they are referred to with their English names, though the subtitles still use Zanahoria and Apio.
  • Celery is called Coriander in the Uzbek dub. Coriander is an herb from the Apiaceae family much like celeries and carrots.
  • In the Polish dub, Carrot and Celery have regular human names (Karol and Celina, respectively), because Polish is a gendered language and the words for the vegetables are the opposite gender from the characters Carrot and Celery.
• Edible Theme Naming: Like the other members of the Propulsion family (except for Jet and Zerk), they are named after vegetables.
• Fatal Flaw: For Carrot, it's him being clueless. For Celery, it's her being Innocently Insensitive.
• Foolish Husband, Responsible Wife: Zig-zagged. Carrot is something of a Manchild House Husband who stays home while his intelligent wife Celery takes the gang on space adventures. However, Carrot can be quite competent, particularly at culinary arts and survival skills, while Celery is as goofy as her husband at times.
• Forgetful Jones:
  • They always forget to not tell people that they come from Bortron 7.
  • In "Earthday Birthday", they tell Jet that a surprise party is being held. Fortunately, they don't tell him that it was for him specifically.
• Genki Guy and Girl: Like all Bortronians, they are very energetic.
• Good, Open Minded Parents: As noted above, they are one of the only positive depictions of parents in animation. Carrot and Celery are very kind, tolerant, and encourage the children in their science exploration, and are always happy to take them into space.
• Happily Married: And how! They are constantly flirting with each other, and have a couple of love songs dedicated to them.
• Holding Hands: They do this in "Back to Bortron 7" while entering the Intergalactic Travel Writers' Headquarters.
• Literal-Minded: Jet's parents' learning curve is filled with funny misunderstandings of the human ways of things, and both kids and parents will have a lot of fun watching them get the hang of "throwing a salad together" and understanding the "string" part of beans. Their Amelia Bedelia-like follies are good for some laughs, but they also reflect the challenges of immersing yourself in a culture that's different from your own.
• Lookalike Lovers: They look exactly the same.
• Masculine Girl, Feminine Boy: Celery likes driving (including racing), fixing things, and has Super-Strength. Meanwhile, Carrot likes cooking, ballet, and fashion. ("Carrot is wearing a cutting-edge woolen scarf. Ooh, all the rage.")
• Nice Guy: They are perpetually cheerful and friendly.
• Parents as People: While Carrot and Celery are intelligent and loving parents, they also have flaws that help humanize them (no pun intended), and have actual personalities outside of just being the parents of Jet. For instance, Carrot can be rather bumbling at times. This eventually comes to a head in "Mindy and Carrot Bake", where Carrot's cluelessness inadvertently gets them stranded in space. Celery tends to be Innocently Insensitive, as it often seems like she doesn't care about Sean due to ignoring his protests of going to space. She does care about him, and just wants him to have a fun time learning.
• The Pollyanna: You can count the number of times they don't smile in an episode with just one hand.
• Shoo Out the Clowns: They are conveniently away from Earth during Space Camp, to help drive the drama of the movie.
• Sickeningly Sweethearts: To the Nth degree. They flirt so much that it makes the other characters very uncomfortable.

Tropes that apply to Carrot

• All Work vs. All Play: Carrot is the All Play to Mr. Peterson's All Work, as shown in "Earth Camping".
• Baffled by Own Biology: In "Endless Summer", Carrot catches a cold. As an alien who isn't used to human illnesses, he wonders why he keeps having "face explosions" (read: sneezing strongly enough to send himself flying). He also finds it strange that it's called a cold since he's feeling hot.
• Birthday Episode: Carrot has his 250th birthday in "Moon Circus".
• Bizarre Taste in Food: The episode "How Come the Moon Changes Shape?" features Carrot ordering a pizza with mushroom, anchovies, fish, pineapple, apricot, and arugula. With extra gravy.
• Brief Accent Imitation:
  • In "Castaway Carrot", while Carrot is stranded on the moon, he decides to go in his "talk-with-an-accent" crater, and briefly talks with a British accent.
  Carrot: 'Ello, guv'nor. Fancy a spot of tea or bangers and mash?
  • In "Bortron Leprechaun", Carrot briefly puts on an Irish accent.
• Bumbling Dad: Carrot is this due to being very silly and often clueless compared to his wife. However, he provides helpful information to the kids and is a great baker, making him a downplayed example of the trope.
• Camp Straight: He does feminine activities such as cooking and ballet (as revealed in "Castaway Carrot"), wears a pink scarf in the aforementioned episode, and yet he is married to Celery.
• Cannot Keep a Secret: In "Moon Circus", Carrot overhears that the kids are planning a surprise birthday party for him, he has to keep the secret that he knows about it, but struggles. Celery explains that this is a shared trait between Carrot and Jet.
• Cordon Bleugh Chef: While Carrot is genuinely a Supreme Chef, he tends to make dishes that are weird and/or disgusting to humans, but pleasant to Bortronians. Deep-fried lollipops and broccoli ice cream sandwiches, for example. In fact, in "Fact Or Fiction?", he somehow makes cookie dough come to life.
• Distressed Dude: In "Castaway Carrot", Carrot gets stranded on the moon, but gets rescued by his family.
• Fainting: Carrot faints into Celery's arms when Jet mentions him in his song in "My Fair Jet".
• Foil: Carrot to Mr. Peterson. Both are somewhat goofy fathers. Carrot embraces his silliness and is usually a nice dad, but isn't above being stern to Jet (like in "Chore Day"). Mr. Peterson, on the other hand, treats the most minor of things as Serious Business (such as mini-golf and the communications satellite not working) and almost always lets Mitchell get away with stuff.
• Go Mad from the Isolation: Carrot undergoes a major Sanity Slippage in "Castaway Carrot" while stranded on the moon. He gets a twitchy eyelid at one point, attempts to farm pizza on the moon, and draws pictures of his family on rocks, and made out with the Celery rock.
• Guest-Star Party Member: He doesn't usually join the gang on their space missions, because he has to cook and his driving makes Celery nervous. However, there have been some occasions where he does tag along, and in "Mindy Pet-sits", he takes Jet, Sean, and Sydney to space while Celery stays home.
• Hidden Depths: Carrot turns out to be a great chef. "Castaway Carrot" reveals several hidden traits, such as that he is a great ballet dancer, and he can hold his own while stranded on the moon.
• House Husband: While Celery is always taking the kids to space, Carrot stays home and does things like cooking.
• In Touch with His Feminine Side: Carrot is a stay at home dad, and he likes to cook. He is also revealed to like ballet in "Castaway Carrot", and he briefly wore a pink scarf while admiring himself in a mirror in the same episode.
• Jaw Drop: Carrot does one in "Back to Bortron 7" after Eggplant informs him and Celery that they'll be done with Earth after their presentation. For dramatic effect, the Exploding Shake that Carrot was holding explodes in his face.
• Like Parent, Like Child: Celery says this trope's name out loud when comparing Carrot and Jet's shared tendencies to not keep secrets in "Moon Circus". She also offhandedly mentions that they both like prune juice with lemons.
• Malaproper: In "Every Day Is Earth Day", Carrot mistakes "toaster" for "poster" and presents a toaster at the DSA celebration, much to Mr. Peterson's annoyance.
• Nice Job Breaking It, Hero: In "Moon Circus", Carrot gets a moment of this when he says out loud that they're planning a surprise party for him.
• Really 700 Years Old: He's 250 in Bortronian years. Since Jet is 63 in Bortronian years and 10 in Earth years, we guess that Carrot would be around 42 in Earth years.
• Real Men Wear Pink: He wore a pink scarf in "Castaway Carrot", and he likes a lot of things that are considered feminine.
• Sanity Slippage: Played for Laughs in Castaway Carrot. Carrot goes insane while stranded on the moon. He attempts to farm pizza on the moon, and gets lonely so he draws pictures of Jet, Celery, and Sunspot on some moon rocks. He even briefly makes out with the Celery rock!
• Secret Secret-Keeper: In "Moon Circus", Carrot overhears from the kitchen that Jet is planning a surprise party for him. Carrot then has to keep the secret that he knows about the surprise party, but ends up telling Jet anyway.
• Slobs Versus Snobs: The Slob to Mr. Peterson's Snob. Mr. Peterson is uptight and takes himself way too seriously. Carrot is more laid-back, silly, and open-minded, which results in Carrot being a much happier person than Mr. Peterson. This is best demonstrated in "Earth Camping", where they clash due to Carrot's inexperience with camping on Earth vs. Mr. Peterson's seasoned experience.
• Smite Me, O Mighty Smiter: In "Jet Can't Sleep", the Propulsion family is playing charades. In one round, Celery pretends to be sleeping. Carrot guesses a coffee table, but then Sunspot correctly guesses that Celery is sleeping. Carrot then remarks that he was gonna say that. Carrot says: "If I wasn't, may lightning strike me!" Then lightning flashes in the sky, and Carrot jumps into Jet's arm. Carrot then remarks that tonight isn't a good night to say that.
• Snake Charmer: Carrot in "Sunspot's Sunspot", where he plays some typical snake charming music and makes Sunspot's tongue wiggle like a snake.
• Supreme Chef: Carrot is an example of one. At least by Bortronian standards anyway.
• Talking to Plants: Carrot sings to plants to make them grow, as shown in "That's One Gigantic Pumpkin, Jet Propulsion!".
• Team Chef: He's always cooking something.
• Weird World, Weird Food: Carrot creates many odd dishes, such as deep-fried lollipops, broccoli ice cream sandwiches, sardine-and-pudding sandwiches, prune juice, caramel-pickle cookies, olive-liver energy bars, and "enchisushisagna".

Tropes that apply to Celery

• Ace Pilot: She is great at piloting the flying saucer, avoiding asteroids and other threats with ease. In fact, Carrot mentions in "How Come the Moon Changes Shape?" that Celery has been voted the best driver (well, technically pilot, but the Bortronians tend to treat saucers like cars) in the Bortron system for three years in a row.
• Action Mom: Besides being an Ace Pilot, she has super strength as revealed in "A Hammer and a Feather", and is generally the most action-y of the Propulsion family.
• Expy: Celery is an expy of Ms. Frizzle from The Magic School Bus. Both of them are eccentric red-haired ladies who drive vehicles that take kids on weird science adventures.
• Foil: Celery to Zucchini. They are siblings who live on different planets (Earth for Celery, and Bortron 7 for Zucchini). They are both cheerful and benevolent. Celery has a job as an intergalactic travel writer and has knowledge about outer space to spare. Zucchini has a job as a mere garbageman and is shown to be very foolish and ignorant about space and even basic Earth science (in his debut episode, he thought that Saturn's moon Titan was Earth, and in "Uncle Zucchini Babysits", he didn't know about the three states of matter).
• Friendly Rivalry: Celery has one with Zucchini. They just love racing each other.
• Gratuitous French: Celery knows how to speak a bit of French, which is shown in "Sunday Drive" and "Sunspot's Sunspot". She says "Allons a Mars" and "Bon appetit".
• Hartman Hips: She has a curvy figure and wide hips.
• Innocently Insensitive: She comes off as this due to the fact that she always ignores Sean's protests and always drags him into whatever space mission that the gang has to go on. This isn't out of pure malice - this is only out of the fact that Celery simply wants Sean to have fun and to learn new things. After all, going into space to learn new things is way more fun and more interesting than simply looking it up online. An example of this behavior would be in "My Three Suns", where she doesn't let Sean go to the bathroom.
• Large Ham: If the Takeoff song number is any indication.
• The Mentor: Celery is very smart and often teaches the kids things about space when she takes them there.
• Ms. Fixit: Bortronians can fix any machine in the galaxy, and Celery is especially good at it. She fixed the saucer both times it broke down in "Sunspot and the Great Red Spot" and "Castaway Carrot."
• Sibling Yin-Yang: Celery contrasts with her brother, Zucchini. Celery is a very good driver and is also quite smart, having a job as a travel writer. Zucchini, on the other hand, has a job as a garbageman and is quite dumb from time to time.
• Super-Hearing: In "Just the Right Distance From the Sun", Celery reveals that Bortronians have super hearing. While this isn't mentioned very often, it does explain why she conveniently drives the minivan up whenever the kids mention going to space.
• Super-Strength: Celery possesses this as shown in "A Hammer and a Feather", where she lifts the saucer up with one hand.
• True Blue Femininity: While she, Carrot and Jet all wear blue suits, it stands out in Celery's case to accentuate her femininity. It's especially effective when she sings gently (such as the lullaby song).
• Women Are Wiser: Celery is much smarter/wiser than Carrot. It's even lampshaded a few times in the show.

Sunspot

Sunspot Propulsion

Sunspot is a Bortronian pet, a kind of cross between a dog, cat, rabbit and raccoon. While he doesn't talk, he likes to imitate the sounds of various other animals. He also makes sound effects, so he's like Gerald McBoing-Boing. He's a pantomime like Harpo Marx, with Snoopy's rich inner life and R2-D2's independence. He's usually way ahead of what the kids are doing, thinking, or realizing. He is good at everything. Sunspot usually plays the instruments in Jet's songs.

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• Abnormal Allergy: Sunspot is allergic to comet dust. No such allergy exists in real life.
• The Ace: Sunspot can do anything. He can pull things out of hammerspace, plays several instruments, and is incredibly smart.
• A Day in the Limelight: Sunspot is the focus of "Sunspot and the Great Red Spot", "Sunspot's Night Out", "Sunspot's Sunspot", and "Ain't No Mars Mountain High Enough".
• A Dog Named "Dog": Sunspot's species is called a Sunspot, according to Word of God, who also referenced this trope by name.
  "yes, Sunspot is a Sunspot, like having a dog named Dog. It’s Bortronian humor I guess"
• Alien Among Us: He is an alien pet that is living on Earth with the Propulsion family, but people often question what animal he is.
• Alien Animals: Sunspot is a Bortronian animal that is a kind of a mix of a rabbit, kangaroo, and raccoon.
• All Animals Are Dogs: Lampshaded within the show. Sunspot sometimes behaves like a dog, and people often confuse him for one.
• Amusing Alien: Much like his owners. Sunspot provides a lot of comedy for the series.
• Animal Athlete Loophole: In "Mini-Golf at the DSA", Sunspot helps Mindy score the hole-in-one needed for the kids' team to win. Bergs thinks that they might be cheating, but Mr. Peterson allows it since there's no rule in the rulebook about animal assists.
• Animals Fear Neutering: In "Castaway Carrot", Celery says "let's fix this puppy" (referring to the saucer) and Sunspot screams in terror. Jet reassures him that Sunspot isn't going to be 'fixed' and the 'puppy' in question is the saucer. Due to Bizarre Alien Biology and Barbie Doll Anatomy, it's unknown if Bortronian pets even need neutering, but the context suggests that they do and Sunspot is afraid of it.
• Ate It All: Sunspot eats all of Sean's peanut butter sandwiches in "Sean's Year in Space", and the entire pizza in "Satellite Selfie".
• Balloonacy: As shown in "Every Day Is Earth Day", Sunspot is able to puff up like a balloon, and Jet flies away while holding on to him.
• Big Eater: Sunspot can be like this sometimes. Sunspot eats all of Sean's peanut butter sandwiches in one episode, and scarfed down an entire pizza pie in another. He even ate an entire sub sandwich in "Mindy in Space".
• Bizarre Alien Locomotion: Sunspot moves underwater by whirling his striped tail like a propeller.
• Black Bead Eyes: He has these kinds of eyes.
• Blowing a Raspberry: In "Ain't No Mars Mountain High Enough", he blows a raspberry at Sydney because he wants to hike alone and doesn't want to team up with the others.
• Brain Freeze: He gets one in the beginning of "Mindy's Ice Rink".
• Cloudcuckoolander: Is usually pretty wacky and does many off-the-wall things that no normal pet could do, something Mitchell points out. Sunspot even acts weirder than usual in "Sunspot's Sunspot".
• Cosmic Motifs: Sunspot is associated with Earth's sun, obviously. The sunspots on the sun affect his behavior.
• Crazy-Prepared: A Running Gag in "One Small Step" involves Sunspot conveniently packing a lot of items the kids need and pulling them out whenever they needed. He packed food, Mindy's teddy bear, a moon rover, a parachute, and more.
• Dub Name Change: Most dubs keep Sunspot's name in English, but some dubs translate or change his name:
  • Finnish: Sputnik (a reference to the famous satellite)
  • Hungarian: Napfolt ("Sunspot")
  • Latin American Spanish: Mancha Solar ("Sunspot"). In the Spanish dub of Space Camp, he went back to being called "Sunspot," though the subtitles still use Mancha Solar.
  • Latvian: Saules Zaķis ("Sun Bunny")
  • Polish: Promyk ("Ray of sunshine")
  • Russian: Лучик ("Little ray of sunshine")
  • Uzbek: Uchqun ("Spark")
  • He has a Punny Name in the Ukrainian dub - the "Сонячний" part of his name means "sun," but the "Зайчик" part of his name can be translated as either "spot" or "bunny," referencing both his original name (which refers to sunspots, dark patches on the sun) as well as his long bunny ears.
• Expy: A brochure describes him as being a mix of Snoopy, R2-D2, Harpo Marx, and Gerald McBoingBoing.
• Face Palm: Sunspot does this several times, whenever Jet does something really dumb.
• Foil: Sunspot to Cody, Mitchell's dog. Both are pets who reside in Boxwood Terrace. Sunspot is a Bortronian pet who is smarter than he appears and has many hidden talents, like making sound effects and pulling objects out of Hammerspace. Sunspot is also more than happy to help Jet and his friends. Ironically, despite all his incredible feats, Sunspot struggles with ordinary Earth pet things like playing fetch. Cody is an ordinary Earth dog who likes sleeping, eating, and isn't all too enthusiastic about helping Mitchell with his detective cases. Cody can do the typical things your average Earth dog can do, but only if he's offered a treat as a reward, as we learn in "Pet Sounds".
• The Glomp: In "That's One Gigantic Pumpkin, Jet Propulsion!", Sunspot excitedly pounces onto Mindy when she whistles for him to come.
• Hammerspace: Sunspot pulls objects out of thin air multiple times. For example, in "Detective Mindy", Sunspot pulls several sunglasses out of nowhere.
• Hates Baths: Sunspot doesn't like taking baths, unless it's in chocolate shakes like on Bortron 7.
• Heli-Critter: At least once, it's shown that Sunspot can move his ears like a propeller to fly.
• Hidden Depths: Sunspot is revealed to have many talents. He can pull objects out of Hammerspace, and can play several instruments, including concertina and pan-pipes.
• Hidden in Plain Sight: Averted with Sunspot, as Earthies often question what type of animal he is.
• Hyper-Competent Sidekick: Of sorts to Jet. He is clearly smarter and more competent than his owner, usually way ahead of what he is thinking or realizing.
• Incredible Shrinking Man: His allergy to comet dust causes him to shrink, which can only be cured by an Applied Phlebotinum called deshrinkulum. He gets better.
• Inflating Body Gag: He can inflate his body like a balloon, as seen in "Endless Summer", "A Hammer and a Feather", and "Every Day is Earth Day".
• I Work Alone: Sunspot had this mentality in "Ain't No Mars Mountain High Enough", where he doesn't want help from any of the other characters in climbing Mt. Sharp. He later learns his lesson though.
• Jerkass Ball: Grabbed firmly by Sunspot in "Ain't No Mars Mountain High Enough". He wants to hike alone and refuses to team up with Celery. He is later humbled when the gang saves him from flying off.
• Literal-Minded: In "Space Junk", Sean asks someone to pinch him, and Sunspot does so, even though Sean didn't mean that literally.
• Male Sun, Female Moon: Sunspot (a masculine alien pet) is themed after the sun and his counterpart Moonbeam (a feminine alien pet) is themed after the moon.
• Meaningful Name: Sunspot gets his name (actually, the name of his entire species) from the sunspots on the sun. Plus, the spot on his tummy kinda resembles a sun.
• Mix-and-Match Critters: He is described as being a mix of a dog, cat, rabbit, and raccoon. This can be seen in his appearance as well, where he has the figure of a kangaroo, the tail of a raccoon, and the ears of a rabbit. He also possesses the behaviors of both dogs and cats.
• Multiple-Choice Past: "Sunday Drive" shows old Propulsion family pictures. In them, Sunspot already lived with the Propulsions when Jet was a baby. However, in Space Camp, a flashback features Jet personally adopting Sunspot from a litter, and Jet doesn't look any younger in the flashback than he does in the present.
• Night and Day Duo: The alien pets Sunspot and Moonbeam are associated with the sun and moon through their names and colors (Sunspot is orange, black, and white; Moonbeam is purplish-blue and white.)
• Not-So-Innocent Whistle: In "Detective Mindy", Mr. Peterson finds his wife's sunglasses, only for them to be broken. He almost goes to the mall to get another pair to replace them (even though he doesn't like shopping), but Sunspot gives Celery's sunglasses to Mr. Peterson instead. Seconds later, Celery asks if anyone has seen her sunglasses, and Sunspot starts whistling.
• O.O.C. Is Serious Business: In "Sunspot's Sunspot", while the kids are concerned about Sunspot's weird behavior, what really shocks them is when Sunspot refuses to eat a hoagie.
• Orange/Blue Contrast: His orange fur contrasts with Moonbeam's blue fur.
• Out of Character: In "Sunspot's Sunspot", Sunspot doesn't act like his usual self throughout the episode. This is justified though, as Sunspot acts strange whenever there's a huge sunspot on the sun.
• Overly-Long Tongue: "Sunspot's Sunspot" shows that Sunspot's tongue is very long.
• Pass the Popcorn: In "Sean's Year in Space", Sunspot briefly eats popcorn while seeing how long Sean can last in the treehouse.
• Playing Sick: In "Mindy Pet-sits", Sunspot fakes an injury so he gets to stay with Mindy.
• Plot Allergy: Sunspot's comet dust allergy, and the ensuing shrinking that follows, is the driving conflict of the movie Space Camp.
• Power Glows: Due to the sun's effects on him, Sunspot's tummy glows throughout "Sunspot's Sunspot".
• Reflective Eyes: He gets these eyes when he sees the sun in "Sunspot's Sunspot".
• Ridiculously Cute Critter: Come on, just look at him.
• Running Gag: Sunspot being one step ahead of the kids, playing the instruments in Jet's songs, and making various sound effects.
• Ship Tease: He has this with Moonbeam sometimes. For example, in "Back to Bortron 7", he winked at her and she fainted.
• Sick Episode: In "Sunspot's Sunspot", Sunspot's weird behavior concerning the sunspot is treated as an illness.
• Signature Instrument: While he plays a multitude of instruments, he most often plays the electric guitar, especially in "Potatoes on Mars". This fits him because of his skill, eccentric personality, and friendliness.
• The Silent Bob: He uses sound effects and body language to communicate, rather than words.
• Silent Snarker: May not speak, but he can be a snarker at times, as indicated by the many scenes where he face-palms. Let's face it - if you were stuck with someone as ditzy as Jet, you would probably be like this too.
• The Smart Guy: Sunspot is incredibly smart, often figuring things out that the kids can't.
• The Speechless: Sunspot does not talk, instead he uses various sound effects to communicate. He actually ends up speaking in "Sunspot's Sunspot", when under the influence of the sunspots on the sun. He says "No, thank you" and "I am lovable, aren't I?".
• Sting: In the episode "Diggin' Earth", Sunspot does it by drumming the air (aliens!) then hitting a shot blade as a cymbal. A response to Dr. Rafferty's "groundbreaking project" quip.
• Suddenly Voiced: Sunspot had never said anything before, but in "Sunspot's Sunspot", he says "No, thank you" and "I am lovable, aren't I?".
• Team Pet: Sunspot serves this role in the team due to being the only animal, and he could be seen as a mascot for the group. He is also quite cool; he can play several instruments, pull objects out of Hammerspace, and has several other hidden talents.
• Troll: He enjoys messing with Dr. Bergs, especially by stealing his watch.
• Vibrant Orange: He's fun-loving and lively, and has the orange fur to match.

Face 9000

Face 9000

Face 9000's look until "Face on the Fritz"

^{Click to see Face as of "Face on the Fritz"}

^{Click to see Face in Space Camp}

Voiced by: Brian Drummond (English), Lee Min-gyu (Korean), Gábor Seder (Hungarian), Juan Guzmán (Spanish), Lileana Chacon (Spanish; Space Camp), Rémi Pous (French; Space Camp)

Face 9000 is a computer. He often pops up to answer the kids' science questions.

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• A Day in the Limelight: "Face on the Fritz" is one for him.
• Advanced Tech 2000: Face 9000.
• Attention Whore: Face can be like this at times, especially in "Back to Bortron 7", where he was jealous of the PowerCube's attention.
• Bad Liar: Because he's programmed to always answer truthfully, he's horrible at lying.
• Benevolent A.I.: He's a congenial computer who is always happy to help Jet and his friends.
• The Cameo: There are some episodes where he appears, but his face doesn't appear and he doesn't speak. "One Small Step", for instance.
• Cannot Tell a Joke: In "My Three Suns", Face 9000 tries to take up comedy, but fails due to not being funny.
• Cannot Tell a Lie: As a computer, he is programmed to answer honestly to every question he is asked. His attempts at disguise in Space Camp are laughable as a result.
• Character Catchphrase: "Face 9000, ready to assist you!"
• Conspicuous Trenchcoat: In Space Camp, he sneaks into space camp by wearing a fedora and trenchcoat.
• Encyclopaedic Knowledge: Due to being a computer, he has extensive knowledge on whatever science topic that the kids want to learn about.
• Exactly What It Says on the Tin: Face is a face.
• Fatal Flaw: His tendency to get jealous easily and his occasional It's All About Me tendencies.
• Foil: To his brother, Face 9001. Even though Face 9001 only appeared in one episode, he's fleshed out enough that one can analyze the differences between him and his brother. Both are talking Bortronian computers that are very intelligent. They also both love attention. While Face 9000 can be an Attention Whore sometimes, he is more often than not a very friendly and helpful computer. By contrast, Face 9001 is an Attention Whore pretty much all the time, on top of having a huge ego and being a jerk to his brother.
• Friendly Tickle Torture: Face is revealed to be ticklish in the episode "Satellite Selfie", where Sydney and Jet tickle him even though he is a computer. Face then says "Oh, forget logic!"
• Green-Eyed Monster:
  • In "Back to Bortron 7", Face is bitter over the fact that the Propulsions are using the Powercube for their presentation and not him. He claims that Powercubes are "overrated".
  • In "Moon Face", Face 9000 gets jealous when he thinks that the kids like the moon "face" better than him. They reassure him that he'll always be their number one face.
  • In "My Three Suns", Face was jealous that the kids found Sunspot to be funnier than him.
• Insistent Terminology: In "My Three Suns", Face 9000 demands that the kids call him "Funny Face".
• It's All About Me:
  • In the episode "Satellite Selfie", he says "I guess you're just not me" when one of the characters asks why they didn't think of a good idea.
  • As noted in Green-Eyed Monster above, he tends to get jealous easily and wants all the attention that the kids are giving to something else. Like the PowerCube in "Back to Bortron 7".
• Just a Machine: In Space Camp, Face wishes that he was programmed to be brave, but he laments that he is but a machine.
• "Knock Knock" Joke: Tries to tell one in "My Three Suns", but fails.
  Face: Knock knock
  Sean: Who's there?
  Face: It's me, Face.
  Jet: Face who?
  Face: No, it is I, Face. I am the one who was knocking (laughs at his own joke while Jet, Sunspot, and Sean stare silently in confusion).
• Laughing at Your Own Jokes: Face often laughs at his own puns, as well as his terrible jokes in "My Three Suns."
• Meaningful Name: Face is a face. He has a 9000 in his name because he is a computer.
• The Mentor: Face knows everything about science, and often pops up to answer the kids' science questions.
• Midseason Upgrade: In the second half of episode 20 of season 1, "Face on the Fritz", Face gets an upgrade and a more 3D design.
• Mr. Exposition: In Space Camp, he explains all the information that Jet needs to know about Sunspot's illness, the cure, and the planet Mascarpone.
• The Noseless: He doesn't have a nose.
• Orange/Blue Contrast: His blue color contrasts with his brother's orange color.
• Out of Focus: Unfortunately so in season 2. He doesn't pop up as often to answer the kids' science questions. Now, the characters will usually consult "The Big Book of X", a DSA scientist, or figure it out themselves. Later averted in Space Camp, where he has plenty of screen time and plays a major role in the story.
• Pun:
  • Makes one in "Mindy's Meteorite Stand":
  "And Sean's right: the proper tests will help you discover if your rock is meteorite or meteor-wrong!"
  • And in "Eye in the Sky":
  "I didn't know weather or not you needed my help!"
• Robot Buddy: A computer that is good friends with the kids.
• Running Gag: Him trying to be funny in "My Three Suns".
• Sibling Rivalry: Has one with his brother, Face 9001.
• Sibling Yin-Yang: With his brother, Face 9001. Face 9000 can be an Attention Whore at times, but he is otherwise a really friendly and helpful computer. Face 9001 is an Attention Whore all the time, loves showing off, and is a jerk to his brother.
• Shout-Out:
  • The 9000 in his name is a reference to his voice actor's most popular role.
  • His name might also be a reference to HAL 9000.
• The Smart Guy: Knows a lot about science, and is arguably the smartest character on the show.
• Token Robot: He's a talking computer, and is the only robot in the main team; everyone else is either an alien or a human.
• Trickster Mentor: In "Chore Day", he keeps popping up whenever the kids are doing their chores to tell them that they are using force, and then keeps disappearing before he can explain what force is. At the end of the episode, the kids confront him about this, and he admits that he kept popping up because he was procrastinating on doing his own chore - cleaning out his memory chip.
• The Unfavorite: Face 9001 tries to convince him that he is this in "A Kid's Guide to Mars", by saying that their mother always said that "Your brother knows everything".
• Wingding Eyes: Face gets heart eyes in "How Come the Moon Changes Shape?" at the thought of pizza.

Earthlings

Sean Rafferty

Sean Rafferty

Voiced by (in English): William Ainscough (season 1, season 2 until "Our Sun Is A Star!"), Grady Ainscough ("You Can Call Me Albedo" to "Moon Face"), Glen Gordon ("Lone Star 2 - Rocket Kids!"-"One Small Step"), Anthony Bolognese ("Space Camp")

Foreign Voices: István Baráth (Hungarian), Hong Beom-gi (Korean), Stefani Villarroel (Spanish; Season 1), Catherine Reyes (Spanish; Season 2), Yojeved Meyer (Spanish; Space Camp), Coralie Coscas (French; Space Camp)

Sean, the son of scientists and astronauts, figures he's going to grow up to be a great scientist himself and plans to lead the first mission to Mars. But he's afraid of heights, fears cramped spaces, and easily gets space-sick - things he's trying to overcome before he grows up and becomes an actual astronaut. Sean's the practical one, always insisting on doing things the old-fashioned way – even though he's now suddenly hanging out in a very sci-fi reality with Jet! Sean's a big fan of following the rules of the Scientific Method, which he sings about in his own song.

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• Acquired Situational Narcissism: Non-popularity example in "Not a Sound." Sean already knows that there is no sound in space, yet Jet and Sydney are convinced that there is sound in space. Sean uses this as an opportunity to look smart and rub the fact that they're wrong in Jet and Sydney's faces. Sean never acts this smug in any other episode of the show.
• Acrofatic: Despite Sean's weight, he was able to do a flawless somersault over Jet's aunt in "Back to Bortron 7". He also pulls off impressive karate kicks and backflips during the "Space Hero" song in Space Camp.
• Affectionate Nickname:
  • As of season 2, Jet lovingly calls him "Sean-zo". He doesn't seem to mind it, except when Mindy calls him that in "Mindy's Bedtime". Hmm...
  • As of "Magnet, PI" he seems to have embraced the nickname as his own, as his magician name is "The Great Seanzo". He also calls himself "Sean-zo" in "Every Day Is Earth Day".
• Agent Scully: In "Fact Or Fiction?", where he, along with Sydney, doesn't believe that clouds are made of cotton candy (and he's right).
• The Aloner: In "Sean's Year in Space", Sean tries to live in the treehouse for a year all by himself, but eventually comes down for dinner.
• All Drummers Are Animals: Inverted. "Potatoes on Mars" shows that he plays the drums, but he's the most uptight and high-strung of the kids.
• Ambiguously Gay: Sean can apply, due to the amount of Ship Tease he has with Jet, especially in Season 2. Like in "Lone Star 2 - Rocket Kids!", when Western!Sean dreamily stares at Western!Jet and admits to liking the kooky feller. He does have rare moments with Sydney, and did try to impress a background girl in "Mindy's Meteorite Stand", but this could be chalked up to overcompensation. Also, Sean loves it when Jet calls him "Sean-zo", but gets annoyed with the very female Mindy when she calls him that in "Mindy's Bedtime". Despite everything, nothing has been officially confirmed.
• Batman Can Breathe in Space: Sean can breathe in space, despite not having an oxygen tank.
• Beautiful Singing Voice: Sean doesn't get to sing much outside of rhythmically talking during song numbers, but when he does sing, everyone acknowledges that he's got talent. Sean apparently gets this from Singing in the Shower. Jet spends a good chunk of "Holidays in Boxwood Terrace" gushing over Sean's beautiful singing voice.
• Big Eater: In "Sean's Year in Space", he tries to stay in the treehouse for a year but comes down when he smells pot roast. Also, it is revealed in "Whole Lotta Shakin'" that he stress-eats, and in "Project Pluto", he said that the Propulsions usually have snacks when the kids go to ask Carrot a question about Pluto, which earned him a funny look from Sydney.
• Big "NO!": He screams "NOOOOOOOOOO!" in "Sean's Robotic Arm" when his Neil Armstrong figure falls down the hole.
• Blue Oni: To Jet's Red Oni. Sean is more cautious and calm than Jet is. During Sean's dream sequence in "Back to Bortron 7", Jet even stands in front of a red sphere and holds a pink one, while Sean stands in front of a blue one and holds a purple one. However, Jet can also be the Blue Oni to Sean's Red Oni, because Sean is more prone to panicking under pressure and being annoyed than Jet is.
• Brainy Brunet: Sean is a studious and ambitious young boy with light brown hair.
• Butt-Monkey: Sean is a downplayed example of this trope. This is a show targeted towards younger audiences, after all. But he can't seem to ever catch a break.
• Captain's Log: A few episodes like "What's Up With Saturn's Rings?", "The Mindysphere", and "One Small Step" show him recording monologues into a tape recorder, which he calls "Astronaut's Logs".
• Character Catchphrase:
  • "Let's think scientifically" - Standard catchphrase
  • "Poppycock!" - Western!Sean
• Character Development:
  • In later episodes of the show, Sean becomes less scared of going to space. He even calls himself "Mr. Adventure". In Space Camp, he declares that he's coming with Jet on Mascarpone, despite how dangerous it is.
  Sydney: When did you get brave?
  • It's subtle, but he doesn't get space-sick as often in Season Two. In fact, it's only ever been brought up twice; once in "Mindy's Ice Rink" (where the high-speed flying makes him feel sick) and again in "Astronaut Ellen Ochoa", where he mentions that the shift in gravity in space makes him space-sick (and appears to choke back vomit as well).
  • A minor example. In "Kid-Kart Derby," when everyone rushes to hug Jet, Sean stands aside and doesn't hug him. In the series finale, "One Small Step," Jet goes missing and Sean gives him a big hug after finally finding him. This shows that Sean's self-esteem has improved greatly to the point where he can work up the courage to hug his closest friend.
  • In early episodes like "Sounds Abound" or "How Come the Moon Changes Shape?", Sean is grossed out by Carrot and Celery's constant flirting. However, he doesn't seem to mind it later on and even helps plan an anniversary date for them in "Date Night."
• Chronic Self-Deprecation: Sean has a rather low opinion of himself despite his accomplishments. He is anxious almost all the time, and he is honestly shocked when Mindy sincerely calls him "cool" in "Magnet, PI".
• Claustrophobia: In "Earth Mission to Moon," Sean admits that he feels weird in cramped spaces. This is one of the things challenging his desire to become an astronaut.
• Cloudcuckoolander's Minder: Is this to Jet along with Sydney.
• Companion Cube: His Neil Armstrong action figure.
• Complexity Addiction: In "Sydney 2", Sean joins in on Jet's Rube Goldberg Device plan. This also helps to show Sean's character development. In Season 1, he wouldn't even think of going to all this trouble, and would likely just state the simple solution. But now he is more open to trying new ideas and taking risks, no doubt thanks to Jet's positive influence.
• Cosmic Motifs: Sean tends to be associated with Mars, since he really wants to lead the first human mission to that planet. It also serves to represent his youth, masculinity, and passion for knowledge.
• Cute Bookworm: He loves reading big textbooks to gather scientific information, and is rather dorky and awkward. His freckles and baby blue eyes help out.
• The Cutie: Baby blue eyes? Check! Button nose? Check! Youthful Freckles? Check!
• Deadpan Snarker: Sean can be this at times, but to a lesser extent than Mindy or Mitchell. Take this quote from "Racing On Sunshine" for instance.
  Sean: Well, would you look at that? Clouds! Who would've thought they'd appear?
• Disappeared Dad: Sean's dad is nowhere to be seen, though his mom is always shown.
• Distressed Dude: In "My Fair Jet", Sean gets carried away by the DSA weather balloon, and Jet rescues him with his jetpack.
• The Drag-Along: He almost never wants to go to space, but is often forced by Jet and Sydney to come along for the ride anyways.
• Dub Name Change:
  • Renamed to Lars in the Norwegian dub.
  • Renamed to Otto in the Finnish dub.
• Endearingly Dorky: Sean is an awkward little kid who is hesitant to travel into space, but he's very kind and lovable, especially when he geeks out about the Apollo 11 mission or demonstrates his drumming, singing, or magical prowess. Sydney is best friends with him, Mindy is usually rude to him but eventually admits that she thinks he's cool, and Jet is very close friends with Sean.
• Expy: Of Pearl, O the Owl, and especially Arnold Perlstein, since they're both neurotic nerds who are reluctant to go on trips, but are always forced to against their will.
• Face Palm: Sean is quite fond of doing these, especially when Jet does something stupid. He facepalms in "Jet Cooks Dinner", "My Fair Jet", "Astronaut Ellen Ochoa", "Total Eclipse Block Party", and "Who Messed Up The Treehouse?".
• Fanboy: Of Neil Armstrong. He's also a fan of Ellen Ochoa. "One Small Step" pretty much has him gushing over the Apollo 11 mission for 60 minutes.
• Fatal Flaw: His fatal flaw is that he fears cramped spaces, heights, and gets space-sick easily, and yet he wants to become an astronaut when he grows up.
• Fat Best Friend: He has a wide body and his tummy slightly bulges (particularly noticeable in◊ these◊ photos◊), and he is friends with Jet, Sydney, and Mindy.
• Fictional Fan, Real Celebrity: In "Astronaut Ellen Ochoa", Sean geeks out when the titular Ellen Ochoa first arrives at the treehouse, and he even addresses her with a Full-Name Basis out of respect.
• Foil:
  • To Sydney. They are both friends of Jet and they are both his minders and kids that love science. Sean likes science facts and sometimes doesn't understand imagination being used in science. He is also more prone to panicking under pressure and, of the main characters, is the most prone to grab the Jerkass Ball (most noticeable in "Sounds Abound"). On the other hand, Sydney prefers science-fiction and using her imagination in science. She is quite calm and laid-back and is also a motherly Nice Girl.
  • To Mitchell. They are both the intelligent, dorky, level-headed, voice of reason within their respective groups, and they both have Youthful Freckles. They also both happen to be the love interests of their leaders (Mitchell for Mindy, and Sean for Jet). However, Sean is friendlier and more open, while Mitchell tries to shut himself out from everyone else. While Sean's desire for logic contrasts with Jet's fantastical nature, he has always liked Jet. It took a while for Mitchell to start warming up to Mindy.
• Get a Hold of Yourself, Man!: The gang is usually this to Sean, who is usually apprehensive about going to space.
• Gleeful and Grumpy Pairing: Jet is a ray of sunshine who is perpetually optimistic, energetic, and friendly. Sean isn't all that grumpy, but he can be stubborn, a Nervous Wreck, and is prone to bouts of angriness and upsetness.
• Goal in Life: His goal is to lead the first human mission to Mars.
• Good with Numbers: Because mathematics is important to astronomy, Sean practices math and is quite good at it. He did math equations while exercising in "Astronaut Ellen Ochoa", and made up his own equation in "Jet's First Halloween".
• Great Big Book of Everything: A Running Gag in Season 2 of Sean having "Big Books" dedicated to the topic of the episode. There's "The Big Book of the Sun", "The Big Book of Birds", "The Big Book of Eclipses", "The Big Book of Clouds", and possibly even more. Lampshaded by Mindy in "Bortron Leprechaun", when Sean pulls out the Big Book of Rainbows. She asks if he has a Big Book for everything. Sean says he doesn't yet, and that he's trying to complete his Big Book library.
• Growling Gut: Whenever he feels sick, it's usually accompanied by his tummy gurgling.
• Head Desk: Does a spectacular one in "Fact Or Fiction?".
• Hidden Depths: Sean is revealed to be a great magician in "Magnet, PI".
• I Always Wanted to Say That: Sean says this after saying "There's not a moment to lose!" and "Come on Zerk! Back to the house! And step on it!" in Back to Bortron 7.
• Implied Love Interest: To Jet. At first, Jet seemed interested in Sydney, but this waned and the Jet/Sean shipping was boosted over the course of the show. Jet is very affectionate with Sean, always teams up with him when the situation calls for it, and has a nickname for him ("Seanzo"). They have sung a duet together, danced with each other at least twice, and Sean finally works up the courage to hug Jet in "One Small Step". In "Lone Star 2 - Rocket Kids!", Sean's character the Shopkeeper all but admits to having a crush on Western!Jet towards the end.
• Innocent Blue Eyes: Sean has cotton-candy blue eyes that emphasize his dorky, Lovable Coward tendencies. However, animation inconsistencies often cause them to appear green or gray.
• Insistent Terminology: In "Night of a Bazillion Stars," Sean brings his Neil Armstrong figure to the sleepover. Sean insists that he's not sleeping with it, he just wants to keep Neil company.
• The Insomniac: Implied. He has creases around his eyes, and in "My Three Suns", there was a gag about him being unable to sleep.
• Ironic Fear: An aspiring astronaut who is afraid of heights and is claustrophobic.
• I Will Find You: In "One Small Step", he becomes worried when Jet and Sunspot go missing. So, Sean and Mindy make it their mission to go and locate them. Along the way, they learn about the Apollo 11 mission. When they finally find Jet, they share a Group Hug.
• Jerkass Has a Point: In "Lone Star", Western!Sean is a cranky shopkeeper who dislikes Lone Star's ideas because they actually could hurt the economy of Boxwood Territory. Western!Sean claims that if people are looking up at the stars all night, they will be tired in the morning and won't be able to cut down trees or dig for gold.
• Kissing the Ground: Sean often does this whenever they get back from space, like in "One Small Step". A couple of times, he spits out grass.
• The Lancer: Sean is this to Jet. While Jet, The Leader, always leaps before looking, is highly energetic, and unironically loves making mistakes, Sean is more cautious, intellectual, and nervous in general.
• Leitmotif: The Scientific Method song. Compositions of it can often be heard in the background in his scenes.
• Loony Friends Improve Your Personality: Jet's craziness and Sydney's huge imagination have had positive effects on Sean. He is more open to making mistakes, taking chances, and using his imagination as the series goes on. Sometimes, he lampshades this by calling himself "Mr. Adventure".
• Lovable Coward: Sean is almost always afraid to go to space, but he usually ends up coming along for the ride anyway, and can be brave if he needs to be.
• Lovable Nerd: Sean is a Nervous Wreck with high intellect and hidden talents, yet he's also sweet and endearing, especially to Jet.
• Mama's Boy: Sean is this due to being close to his mom. It also helps that his dad is never around.
• Mean Character, Nice Actor: In "Lone Star", Sean plays a Jerkass shopkeeper who doesn't believe Lone Star. However, Sean is actually a (cowardly) sweetheart in real life.
• Meaningful Name: Sean means "God is gracious", which suits Sean because he is polite to others. Rafferty means "one who will prosper", which suits the Rafferty family as a whole because Sean's mother, Dr. Rafferty, is an accomplished scientist.
• Nervous Wreck: Sean is pretty nervous at times, especially when going to space.
• Not So Above It All: Sean becomes more excited about going into space with the others in later episodes, despite him wanting to go the space the traditional way.
• Obsessively Organized: As the perfectionist of the cast, he is super neurotic and gets frustrated when things aren't exactly right and mistakes are made. He especially shows this in "Eye in the Sky," where he has charts for every single situation that he could end up in...except for rain.
• Oh, Crap!:
  • He screams in terror almost every time they go into space. It's a wonder that he doesn't have a sore throat by now.
  • Yeah, about that...
• Only Sane Man: Whenever the kids are faced with a problem, he often provides the logical method of solving it while the other kids deliberately play around and make mistakes to solve the problem. He often shares this role with Sydney.
• Out-of-Character Alert: In "Date Night", "Not A Sound", and "A Hammer and a Feather", him actually wanting to go to space is met with concern and shock.
• The Perfectionist: Sean is uptight, always wants to do things by the Scientific Method, and is frustrated whenever mistakes are made.
• Post-Stress Overeating: Sean eats when he's stressed. In "Whole Lotta Shakin'", he offhandedly comments that he wants to eat macaroni and clarifies that he eats a lot when he's nervous. And considering he's a Nervous Wreck all the time, this provides an explanation for his overweight figure.
• Primal Fear: Sean is afraid of heights and being in tight spaces.
• Red Oni: Sean is the Red Oni to Sydney's Blue Oni. As stated before, Sean is more prone to freaking out and getting frustrated, unlike Sydney who has a level-headed, mellow nature. However, Sydney can also be the Red Oni to Sean's Blue Oni because Sydney is wildly imaginative and often goes along with major Red Oni Jet's ideas, while Sean often plays the role of the Only Sane Man.
• Rhetorical Request Blunder: Sean asks Sunspot to pinch him in "Space Junk", "Whole Lotta Shakin'", and in "Astronaut Ellen Ochoa". Sean doesn't actually mean it, but of course, Sunspot pinches him anyway.
• Rule of Symbolism: Sean represents science facts. In contrast to Sydney, who likes fiction, Sean is all about the facts. Sean likes to do things the old-fashioned way and does not like change as much as the others do, and he's got a hard time using his imagination as shown in "Backyard Moon Base", however, he does come from a family of scientists AND astronauts, so he figures he's going to be a great scientist himself, and likes to use the Scientific Method to solve problems. He also wants to lead the first human mission to Mars, despite the fact that he gets space-sick easily, is afraid of cramped spaces, and has a fear of heights.
• Running Gag:
  • Sean being nervous about space, and singing the Scientific Method.
  • In "Astronaut Ellen Ochoa", there's a running gag of Sean exercising while doing math problems.
• Sick Episode: Was subjected to this in "Sean Has A Cold".
• Sharp-Dressed Man: In "Magnet, P.I", he gets to wear◊ a tuxedo and top hat for a magic show.
• Shy Finger-Twiddling: Sean does this in "Our Sun Is A Star!".
• Signature Instrument: In the band, he plays the drums.
• Similar Squad: To his mom Dr. Rafferty, with whom he has Shared Family Quirks, namely them being the most nervous of their respective teams. Like his mother, Sean is fairly intelligent and level-headed.
• Stage Magician: As shown in "Magnet, PI", Sean is an amateur magician called The Great Seanzo.
• Steamrolled Smart Guy: Sean is an uptight perfectionist who likes to do things the traditional way, most notably by using the Scientific Method. He's smart and also serves as the Straight Man and Only Sane Man in his gaggle of goofy friends, and they never listen to him, especially Jet since he always wants to make mistakes deliberately and play around to solve problems.
• Straight Man: Sean is usually this when with Jet, Sydney, and Mindy, being the most logical of them all in any given situation.
• Trademark Favorite Food: Sean loves pot roast.
• Trauma Button: As demonstrated in "Galileo, Galileo!", the memory of when he froze up at the Christmas pageant is a huge source of anxiety, trauma, pain, and humiliation for him. It's enough to make him nervous to do his school report on Galileo when he was previously confident. Luckily, his friends help him regain his confidence.
• Unmanly Secret: In "Sean's Neptune Tune", the thing he was trying to hide from Jet and Sydney was the fact that he was scared to go to Neptune because of a Commander Cressida comic.
• Vocal Evolution: In season 2, his voice is deeper and raspier, most likely due to puberty by his voice actor. In mid season 2, when his VA changed, his voice is more high-pitched and nasally.
• Wingding Eyes: He gets fireworks in his eyes when he sees Ellen in "Astronaut Ellen Ochoa".
• Yellow Earth, Green Earth: His green Color Motif emphasizes his connection to Earth. Sean adores Planet Earth above all else, and occasionally takes time to comment on how beautiful it is.
• You Remind Me of X: In "The Grandest Canyon", Sean remarks that Mindy reminds him of a young him, but Sydney tells Sean that "you are still young you."
• Youthful Freckles: Has freckles on his face. However, the lighting (particularly in outdoor scenes) make them hard to see.

Sydney Skelley

Sydney Skelley

Voiced by (in English): Dalila Bela (season 1) Vienna Leacock (season 2)

Foreign Voices: Adrienn Pekár (Hungarian), Jeon Hae-ri (Korean), Navid Cabrera (Spanish), Angelica Rodriguez (Spanish; Space Camp), Lara Pegliaso (French; Space Camp)

Sydney is the "sci-fi kid." She loves sci-fi stories – ANY kind of story, in fact- but especially a multi-platform series, "Commander Cressida", about a fearless female spaceship captain. Sydney is all about using her imagination. She represents the power of imagination in science – the person who asks "what if?" She knows that science-fiction ideas have inspired many technological innovations and advances and that scientists are as inspired by what they saw on Star Trek as anything in a scientific journal.

Sydney's mom is a robotics engineer who works at the DSA.

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• Acting for Two: In "Lone Star" she plays both one of the townspeople, and the town's only science teacher.
• Action Girl: Sydney can slip into this territory at times, most notably in "Back to Bortron 7".
• A Day in the Limelight: In "Sydney 2".
• Affectionate Nickname: Her mom calls her "Syd" in "Sydney 2".
• Agent Scully: In "Fact Or Fiction?", where she, along with Sean, doesn't believe that clouds are made of cotton candy (and she's right).
• Alliterative Name: Sydney Skelley.
• Batman Can Breathe in Space: Sydney can breathe in space, even without a spacesuit with an oxygen tank.
• Big Damn Heroes: In the one-hour special "One Small Step", Sydney gets her moment when she and Jet 2 fix the super saucer together, allowing the gang to return home.
• Black and Nerdy: Not nerdy in the typical sense, but she's nerdy in that she's a science-fiction geek who knows a lot about Greek mythology. She's also shown to know quite a bit about mechanics.
• Buffy Speak: She refers to Jet's backpack as a "tool-armed backpack thingy".
• The Cameo: Made one at the beginning of "Treasure Map".
• Character Catchphrase: "A kid's place is exploring space!", which is also the catchphrase of Commander Cressida.
• Closer to Earth: Zig-zagged. While she is a minority who's more levelheaded than the Idiot Hero Jet, Sydney isn't flawless whatsoever and does make mistakes. However, she has way fewer issues than her fellow friends and neighbors, and has it all together.
• Cloudcuckoolander's Minder: Both Sean and Sydney help keep Jet in check.
• Companion Cube: Her Commander Cressida action figure.
• The Conscience: Serves as this to the rest of the team members. She will usually talk them out of doing something that is silly or wrong, and will give them wise advice.
• Cool Big Sis: Sydney acts as one towards the rest of the main cast, being cool in the sense that she's kind, wise, and motherly, and also in that she's intelligent and creative.
• Cosplay: Occasionally, she dresses up as Commander Cressida. She wears the outfit for the entirety of "Commander Mom".
• Disappeared Dad: Sydney has a mom as revealed in "Back to Bortron 7", however, her dad is nowhere to be seen, despite the fact that she said she has a dad in "Mindy's Mystery".
• Dub Name Change:
  • Renamed to Signe in the Norwegian dub.
  • Renamed to Sanni in the Finnish dub.
• The Face: She's the resident social expert of the gang, and provides her friends with wisdom and moral support.
• Fangirl: Sydney is this to Commander Cressida.
• Fatal Flaw: Finally gets one in the season 2 episode, "Sydney 2". She is shown to be over-ambitious, shown when she assumes that programming the eponymous robot will be easy, until she realizes that robots don't know how to be friends.
• Foil:
  • To Sean. They are both friends of Jet and they are both his minders and kids that love science. Sean likes science facts and sometimes doesn't understand imagination being used in science. He is also more prone to panicking under pressure and, of the main characters, is the most prone to grab the Jerkass Ball (most noticeable in "Sounds Abound"). On the other hand, Sydney prefers science-fiction and using her imagination in science. She is quite calm and laid-back, and is also a motherly Nice Girl.
  • She's also a foil to Lillian. Both are the very kind-hearted and imaginative girls in their respective groups. But while Sydney is smarter and, while imaginative, knows how to separate fiction from fact, Lillian is more airheaded and easily believes in the supernatural.
  • To Mitchell. They both are the only kids of their respective genders in their age groups (Sydney is the only girl in the older kids and Mitchell is the only boy in the younger kids). They also both have emerald-green eyes. However, they cancel each other out. Sydney is highly imaginative, while Mitchell claims to have a terrible imagination. Sydney is very compassionate and makes friends easily, as opposed to Mitchell, who tends to be callous and has No Social Skills.
• Gamer Chick: She enjoys playing video games, most notably a game called "Astro Tracker"
• Gender-Blender Name: Her name can and has been used for females and males.
• Goal in Life: Her goal is to become a great science-fiction author.
• The Heart: The peacekeeper of the team, who acts as a moral compass for her friends and is equal parts Cool Big Sis and Team Mom.
• Hidden Depths:
  • Sydney is shown to have a real knack for engineering and mechanics. She builds her own robot in "Sydney 2", and fixes the saucer in "One Small Step".
  • Sydney can play the piano very well, as we learn in "Potatoes on Mars".
• Improbable Piloting Skills: In "Back to Bortron 7", Celery assigns Sydney the role of the co-pilot of the Mothership. Sydney figures out how to steer the mothership almost instantaneously. This continues into the regular season 2 episodes as well. In "Souped-Up Saucer", Sydney becomes the Wingman of the flying saucer, proving herself to be just as skilled a pilot as she was in "Back to Bortron 7".
• I Know Mortal Kombat: Sydney is a pro at the video game "Astro Tracker", which involves a joystick and precision skills. Because of this, she easily becomes a great co-pilot to both the Mothership and the family saucer.
• Instant Costume Change: Whenever the group goes into space, Sean and Sydney instantly change from their regular outfits to their spacesuits.
• Kissing the Ground: In "Tiny Blue Dot", Sydney, along with the others, kisses the ground when they get back from space.
• Limited Wardrobe: Sydney doesn't really wear any other clothes besides her regular outfit and her space-suit. She doesn't even wear pajamas when she goes to sleep!
• Meaningful Name: Her surname, Skelley, means "storyteller", which suits Sydney due to her love of telling stories.
• Ms. Fixit: She was able to fix the saucer in "One Small Step", with the help of Jet 2, of course.
• Ms. Imagination: This is her defining character trait. Sydney likes to use her imagination in science, which contrasts with Sean's all-consuming drive for science facts. She often leads the kids in Imagine Spots.
• Nice Girl: This is also her defining character trait. Sydney is very kind-hearted and cares for her friends. She's even fairly nice to Mitchell Peterson.
• Only Sane Woman: Sydney can be this at times, especially if Sean (who she shares the role of the Only Sane Person with) is being Out of Character. For example, in "Back to Bortron 7", she suggests talking to Jet's parents instead of assuming that they're moving back to Bortron 7 and trying to hide the house remote. In fact, they both serve this role in "Fact Or Fiction?".
• One of the Boys: Because Sydney does not have any female friends who are her age (Mindy and Lillian are both younger than her), she hangs out with Jet and Sean, who gladly accept her into their circle. Sydney isn't hyperfeminine at all and enjoys traditionally masculine things like gaming and comic books.
• Rule of Symbolism: Sydney represents the power of imagination in science. Sydney is obsessed with science fiction and comics, and idolizes a character named Commander Cressida. She is very imaginative and likes to think creatively in situations, as well as create her own fanfictions about Commander Cressida in the treehouse.
• Sequential Artist: Sydney is a relatively decent artist who writes and draws her own Commander Cressida fan comics.
• Signature Instrument: In the band, Sydney plays the piano. A piano can be mellow and can represent contentment, fitting Sydney's easy-going personality.
• Similar Squad: To her mother Dr. Skelley. Sydney is the peacekeeper and pretty much the 'parent' of the team whenever they do foolish things. Dr. Skelley is easily the most level-headed of the DSA scientists, as she always offers a clear plan of what to do next, as does Sydney. What's more, they have a shared love of engineering and Commander Cressida comics.
• Smart People Build Robots: She built her own robot clone, Sydney 2, who is by far more functional than her predecessor Jet 2.
• The Smurfette Principle: Within the older kids, she is the only girl.
• The Storyteller: Sydney loves telling stories. She often tells her stories to the other kids.
• Team Mom: She often plays this role to the other team members, especially Jet and Mindy, given her wise and kind-hearted nature that gives the impression of a mother-like figure.
• Token Minority: Sydney is African-American.
• Tomboy and Girly Girl: Sydney is the tomboy to Mindy's girly girl, as Sydney has no interest in feminine things.
• Vocal Evolution: In season 2, her voice sounds much younger. However, it does get deeper in "One Small Step".
• Wingman: In Season 2, Sydney becomes the co-pilot of the Propulsion saucer, following the excellent piloting she demonstrated in "Back to Bortron 7".
• Women Are Wiser: Sydney is not the smartest kid in the group, but she's definitely the wisest. She is shown to be more sensible than the stubborn Sean and the impulsive Jet.
• Wrench Wench: Sydney is shown to be an expert mechanic in "One Small Step", fixing the super saucer with ease.

Mindy Melendez

Mindy Melendez

Voiced by: Jaeda Lily Miller (English), Jang Eun-suk (Korean), Lilla Hermann (Hungarian), Angie Mallo (Spanish), Corrine Martin (French; Space Camp)

Mindy lives across the street and is always coming over to see what the bigger kids are doing. Mindy is 4, so she asks the real questions that 4-year- olds ask about space. The answers to these questions are often what the episodes are about. She's not always in possession of the facts and is still a magical thinker. To her, the phases of the Moon mean that there are "a lot of moons, like the round fat one, and the one shaped like a taco, and the skinny, pointy one."

In the season 2 episode, "Mindy Turns Five", she turns five and gets to go to space.

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• Abhorrent Admirer: She appears to be this to Mitchell in several episodes. For example, in "Kid-Kart Derby", she asked Mitchell to come see Jet's electric engine with her, which can be interpreted as Mindy trying to ask Mitchell out on a date, but Mitchell coldly rejects her. However, this averts starting in "Detective Mindy", where they are now on pretty good terms with each other.
• Ageless Birthday Episode: Mindy has her birthday in "Mindy's Moon Bounce House", but it is unspecified what age she became. Even though Mindy was 4 until "Mindy Turns Five".
• Agent Mulder: She believes in ghosts, witches, magic, and demonic spiders, things that Mitchell believes aren't real, as shown in both "Jet's First Halloween" and "That's One Gigantic Pumpkin, Jet Propulsion!". In "Who Messed Up The Treehouse?", she believes that clouds are made out of cotton candy.
• Alliterative Name: Mindy Melendez.
• All-Loving Hero: While not to the extent of Jet, Mindy sees the good in everyone, even if she is sassy towards them at times. For example, Mindy never stops being kind to Mitchell despite him acting standoffish toward her, and Word of God even stated that Mindy "can draw him out." In Space Camp, she even befriends a space monster after she finds out that it's friendly.
• All Love Is Unrequited: Mindy seems to like Mitchell, but he often rejects her advances. This averts in later episodes, however.
• Animal-Eared Headband: Mindy wears a hat with bear ears on it. She also wears a nightcap with bear ears, and her space helmet has bear ears.
• Animal Motif: She has a bear motif. She wears a hat with bear ears, has a teddy-bear named Stuffy Bear, dresses up as Stuffy Bear for Halloween, and her space helmet has bear ears on it.
• Animation Bump: Mindy has carefully animated hair, and her large pigtails are detailed and can often be seen moving and bouncing with the smallest movements of her head, which helps portray her innocence.
• The Baby of the Bunch: Mindy is the youngest in the group, and does not get to do as much stuff as the older kids.
• Batman Can Breathe in Space: Like Sean and Sydney, she can breathe in space even though her space-suit lacks an oxygen tank.
• Birthday Episode: She has an ageless birthday in "Mindy's Moon Bounce House" and has her fifth birthday in "Mindy Turns Five".
• Character Development: In the main series, Mindy sometimes felt bad about being the smallest, like in "Jet Shrinks the Kids." In Space Camp, she is happy to be small and uses her size to help out. She also becomes more of an All-Loving Hero in the movie, being the first to befriend a monster. Moreover, her Little Miss Snarker tendencies have disappeared, as she is nothing but genuinely kind throughout the movie.
• Cheerful Child: She is one of the prime examples of this trope, given that she is four (later five) years old. You can probably count all the times she doesn't smile in one episode with one hand.
• Comically Missing the Point: In "Who Messed Up The Treehouse?", when Sunspot tries to tell the kids that they all made the mess, Mindy thinks that a parade of squirrels came into the treehouse and made a mess.
• Companion Cube: Mindy's teddy-bear, Stuffy Bear.
• Constantly Curious: Pretty much speaks for herself. Mindy's entire purpose in the show is to represent curiosity.
• Cosmic Motifs:
  • Mindy is associated with meteors and meteorites. She found a meteorite in "Mindy's Meteorite Stand" and she has witnessed meteor showers twice, in "Mindy in Space" and "Jet's Time Machine".
  • Pluto. Like Mindy, Pluto is a very small dwarf planet. Mindy sympathizes for it no longer being classified as a planet. "Project Pluto" has her accepting the fact that it's not a planet anymore. In "From Pluto with Love", she learns about Pluto's 'heart', the Tombaugh Reggio. She helps send a valentine to it.
• Curtains Match the Window: Mindy has brown hair and brown eyes.
• The Cutie: She is so adorable with her bear hat and Constantly Curious nature.
• Dame with a Case: In "Sean's Robotic Arm", Sean drops his Neil Armstrong figure down a hole and needs help getting it out. Mindy approaches local Mitchell (who has a crush on her) to ask him to help. He says that it doesn't sound like a detective problem, but lets her borrow Cody to help dig the hole.
• Deadpan Snarker: Mindy can be this at times. For example, Mindy savagely roasts Sean in "Mindy's Moon Bounce House" when he is trying to teach her about gravity by saying that he can't catch.
• The Defroster: In Craig Bartlett's words, she's the one to draw out Mitchell, and she, along with Jet to a smaller extent, contribute to his defrosting by reaching out to him.
• Disappeared Dad: She has a dad, but he is nowhere to be seen.
• The Ditherer: In "Commander Cressida Begins" at least. That episode is about her being unsure of where to go next in regards to space.
• Dub Name Change:
  • Renamed to Mina in the Norwegian dub.
  • Renamed to Minttu in the Finnish dub.
• Extracurricular Enthusiast: Mindy does a lot of extracurricular activities. Whenever the older kids go to space, she leaves by saying she has to go to a specific class. She takes jiu-jitsu, rumba, and especially flugelhorn lessons.
• Everything's Better with Sparkles: She absolutely loves glitter, as shown in "From Pluto With Love" and "Every Day Is Earth Day".
• Foil: To Jet. Both are the enthusiastic, curious leaders of their respective age groups (Jet for the older kids, and Mindy for the younger kids). Jet is an alien who is the new kid in town, so he is rather naive about how Earth works, in contrast to Mindy, who is a young child but has a rather solid grasp on Earth culture and traditions, most of the time anyway. Another difference lies in their knowledge of space. Jet, being a space alien and having traveling parents, knows a lot about outer space and is always eager to learn more. Mindy often gets things wrong about space, like that the Sun orbits around the Earth and that there are multiple different moons orbiting Earth. Finally, their kindness. Jet is an All-Loving Hero who has astounding patience with jerks like Mitchell and Zerk, and always owns up to his mistakes. Mindy is nice most of the time, but she is rather self-centered, sassy, and sarcastic, doesn't like to admit her mistakes, and likes forcing Sean to go to space.
• Genki Girl: She's a highly bubbly and energetic little girl.
• Girlish Pigtails: Mindy wears her hair in pigtails, representing her youth.
• Girls Love Stuffed Animals: She has a teddy-bear named Stuffy Bear.
• Girly Girl: Mindy loves the color pink, dolls, teddy-bears, and tea-parties.
• Gleeful and Grumpy Pairing: Mindy and Mitchell's relationship directly mirrors Jet and Sean's. Mindy is a Cheerful Child who is enthusiastic and curious about everything. Mitchell is a snarky, deadpan, egotistical, antisocial know-it-all. Mindy helps draw Mitchell out of his shell and become a better person over the course of the show. Like Jet and Sean, they also have Ship Tease here and there.
• Hidden Depths: Mindy is revealed to be a great flugelhorn player.
• "I Am" Song: She has a song about herself called "My Name is Mindy".
• Idiot Ball:
  • Grabs this in "Galileo, Galileo!" where she is convinced that the Sun revolves around the Earth, despite learning the opposite in "Round and Round".
  • She also grabs this in "Our Sun Is A Star!", where she believes that the Sun isn't a star, even though she learned that the sun is a star in "How We Found Your Sun".
• It's All About Me: Mindy can be this at times. For example, Mindy remarks that the other kids can't think of good ideas like she can because they're just not her in "Satellite Selfie." Also, in "Sounds Abound", a one-off joke was that Mindy wanted Sean to name a planet after her.
• I Will Find You: In "One Small Step", she becomes worried when Jet and Sunspot go missing. At one point, Mindy even thinks that a "moon monster" got them. So, Sean and Mindy make it their mission to go and locate them. Along the way, they learn about the Apollo 11 mission. When they finally find Jet, they share a Group Hug.
• Kid-Appeal Character: Mindy was added to appeal to the younger demographic. And it apparently succeeded. The show's Facebook once had a contest where in order to win a DVD that had some episodes of the show on it (as well as space-themed episodes of other PBS Kids shows), the parents had to comment their child's favorite character. A very large chunk of parents said that their child's favorite character was Mindy.
• The Kirk: Mindy serves this role in her group with Lillian and Mitchell, as seen in "That's One Gigantic Pumpkin, Jet Propulsion!". Lillian and Mitchell are different in many ways, but Mindy brings them together (because she is Lillian's friend and Mitchell's implied crush) and easily balances them out.
• Leitmotif: "My Name Is Mindy". If you listen closely, you can hear an instrumental playing when she's around sometimes.
• Little Miss Snarker: Mindy is a very young girl who enjoys making acidic remarks.
  Sean: (after a ball he threw lands on his head) Do you know why that happened?
  Mindy: Because you can't catch?
• Missing Mom: Mindy's mom is heard, but never seen.
• Moe Couplet: Mindy and Mitchell - Mitchell brings out Mindy's confidence and leadership, and Mindy brings out Mitchell's kindness.
• Morality Pet: As the show progresses, Mitchell gains a soft spot for Mindy. This is because Mindy was the first character to extend a hand in kindness towards him.
• Mouthy Kid: Like Mitchell, Mindy can very snarky and sassy for such a young age.
• Never Bareheaded: She is never seen without some kind of hat on. She even wears a hat when she goes to sleep. Subverted in Space Camp, where she takes her hat off during the "Space Hero" song.
• Nice Mean And In Between: Mindy is the In-Between to Lillian's Nice and Mitchell's Mean. While Mindy is generally a friendly girl, she is not above making snarky comments at others' expense from time to time. She is usually the one to balance Lillian and Mitchell out.
• Not Allowed to Grow Up: Averted, as she turns five in "Mindy Turns Five".
• Obfuscating Stupidity: Implied. In "How Come the Moon Changes Shape?" Mindy believes that the Earth has many moons, and thinks that the phases of the moon are completely different moons. The big kids explain to her that there's only one moon. At the end of the episode, Mindy admits to Sunspot that she already knew that the Earth only has one moon, and she just likes making the big kids explain over and over.
• Rule of Symbolism: Mindy represents curiosity. Mindy was originally not in the show, according to the producers. But after testing the initial pilot with children, the producers decided to add Mindy in to have a character for the younger set to look up to as a role model, since this show is more for older kids. Mindy doesn't know a whole lot about science, and is far too young to go into space with the others, but she's welcomed into the group, treated as an equal, and never talked down to. Mindy is often the reason for the episodes' plots. Due to her curiosity, she often asks a basic, kid-friendly question about space which prompts the kids to look for an answer, either by going into space or by staying on Earth.
• Running Gag:
  • Mindy not being able to go into space due to not being allowed to go anywhere past Jet's yard. Becomes averted after she turns five in Season 2.
  • Also, Mindy sneaking up on Mitchell.
• Ship Tease:
  • Starting with the episode "Mindy's Weather Report", it seems as though Mindy has a huge crush on Mitchell, though it's never outright stated in the show. In the aforementioned episode, Mindy acts nervous and stammers when Mitchell comes to see her weather report. In later episodes, Mindy starts sneaking up on Mitchell, much to his chagrin. In "Solar System Bake-Off!", she rejoices at the fact that Mitchell is entering the baking contest, and immediately starts acting touchy-feely towards him, and wants him to join her team. Mindy also seems to win Mitchell over with her Saturn cake towards the end of the episode. As mentioned above, Mindy asking Mitchell to check out the electric engine with her can be interpreted as Mindy trying to ask Mitchell out.
  • In "Detective Mindy", he actually shows signs of liking her back. The icing on the cake is when at the end of the episode, Mitchell gets down on one knee and suggests that he wants a friendship with Mindy. Then the other kids cheer wildly as the episode ends. This is treated as if Mitchell asked Mindy to marry him.
  • She hugs him in "Sean's Robotic Arm".
• Signature Headgear: Her bear hat contributes to her overall bear motif.
• Signature Instrument: She plays the flugelhorn, a brass instrument, in Jet's band and elsewhere. Brass instruments represent excitement and energy, both of which are traits that Mindy possesses.
• Similar Squad: Mindy is a direct reflection of Mr. Peterson. Both have brown hair and outfits with warm colors. They both are very self-centered and proud, but are also the oddballs in their respective groups: Mr. Peterson does not have a doctorate (hence why he's called Mr. and not Dr.), and Mindy is the youngest of the kids. Coincidentally, Mindy has a crush on Mr. Peterson's son Mitchell.
• Sincerity Mode: In "Magnet, PI", Mindy earnestly tells Sean that she thinks he's "so cool". Given how sarcastic Mindy sometimes is to Sean, he was surprised.
• Smart Dumb And In Between: The In Between to Mitchell's Smart and Lillian's Dumb. Mitchell is incredibly intellectual and adorably precocious for his age, and that's saying something since Boxwood Terrace is full of child prodigies. Lillian is the exception to that, since she's an Asian Airhead who Cannot Keep a Secret and at one point, believed clouds were made of cotton candy. Mindy is the middle point between the two. Mindy does know a lot about space for her age, but is prone to forgetting facts she learned in previous episodes.
• Spotlight-Stealing Squad: Due to being a very popular character in the target demographic of children, she has the lion's share of spotlight episodes and overall focus in season 2. She has a major role in almost all of the episodes she appears in, even more than Jet himself. This practice has reduced screen time for Sydney, Face 9000, Dr. Rafferty, Dr. Bergs, Mitchell, Uncle Zucchini, and Lillian. Later averted in Space Camp, where she gets equal screen time to everyone else and gets properly developed.
• Tagalong Kid: Mindy is the youngest of the team and wants to go into space, but can't because she can't go anywhere past Jet's yard. At least not until season 2.
• Token Minority: Mindy is Latina.
• Tomboy and Girly Girl:
  • Mindy is the girly girl to Sydney's tomboy because she loves dolls and tea parties.
  • Mindy is herself the tomboy to Lillian's girly girl, as seen in "The Grandest Canyon". Mindy may be fairly feminine in her own right, but Lillian appears to be even more so, right down to her blatantly feminine outfit when she first appears, in comparison to Mindy's more, um, plain usual outfit.
• Unwitting Instigator of Doom:
  • In "What Goes Up...", Mindy tells Mitchell next door that Jet is building a flying saucer. This causes him to get suspicious and begin his Series Goal to learn the truth.
  • In "Sean's Robotic Arm", Mindy slams her toy rocket on the seesaw, causing Neil Armstrong to fly in the air and fall into the crevice.
• Vibrant Orange: Her orange sweater reflects her Cheerful Child personality.
• Vocal Evolution: Mindy's voice started off soft and with a slight lisp (it's especially noticeable in the online game Mindy's Constellation Exploration), but over time, it becomes much louder and nasal. Her voice also gets deeper in Space Camp.
• Women Are Wiser: Mindy, though only 4 (later 5), is sometimes wiser than the older kids. A good example of this would be in "Treehouse Space Station", where she figured out that the kids need to share the treehouse before anyone else did.