Character page for Justice League Action.
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Superheroes
The Justice League
In General
- Genius Bruiser: Most of them can handle themselves in a fight, but they also know how to think their way out of a problem.
Superman
Superman (Clark Kent)
"Truth, Justice, and the American Way!"
Voiced by: Jason J. Lewis
- The Ace: Wonder Woman, at least, regards him as such in "Good Cop, Bat Cop." He proves it in "Under a Red Sun".
- Action Hero
- Apologetic Attacker: When he's interrogating Deadshot as the "Bad Cop." It completely ruins the effect.
- Big Good
- The Cape: Being Superman and wearing a cape, this goes without saying.
- Genius Bruiser: While super strong and nigh invulnerable, there are moments where he had to think tactically and outside of the box to win a battle or escape a predicament.
- The Kirk: Of the big three, he's not as controlled as Batman or as emotional as Wonder Woman.
- The Leader: Of the Justice League as a whole.
Batman
Batman (Bruce Wayne)
Voiced by: Kevin Conroy, Tara Strong (young)
- The Ace: Despite not having superpowers, he's the most competent member of the League and the one everyone looks up to (and fears disappointing).
- Badass Normal: He has no powers, but he's the most skilled in hand-to-hand of the big three.
- Berserk Button: He sends a rather menacing Death Glare at Cyborg when the latter has to control Batman like a video game character against Toyman and complains that Batman has no powers.
- Jerk with a Heart of Gold: He's a no-nonsense fighter and strategist with a bit of a crusty attitude, but you can't deny that he wants to protect others.
- Laser-Guided Amnesia: In "Time Out", he chews out Booster Gold for his It's All About Me attitude. However, the plot ends up being about him getting trapped outside of the timestream with him and discovering that Booster does heroics that nobody else wants to do on his own time. But it doesn't last, as Batman's life gets put in danger and Booster has to send him back to the timestream despite that it'll wipe his memories all the way back to the last time they saw each other being when he got chewed out. Batman is reluctant to go through it, but tells Booster that he hopes he'll learn about Booster's true self again one day.
- Not So Stoic: When Darkseid refers to Mr. Miracle as his "Prodigal Son", Batman for a moment looks absolutely surprised by the revelation.
- The Spock: Of the big three, he's the most controlled and logical of the league and is a master of exposition.
Wonder Woman
Wonder Woman (Diana of Themyscira)
Voiced by: Rachel Kimsey
- Adaptational Modesty: Her new costume doesn't show any cleavage and now sports a warrior skirt.
- Blood Knight: The one who’s more than happy to fight someone.
- Bound and Gagged: Happens quite often, with an emphasis on the "Bound", although she also gets gagged
◊ in Selfie Help. - Jerk with a Heart of Gold: She has quite the thirst for battle, and is a bit pushy, but she is still a tried and true warrior who looks out for others.
- The McCoy: Out of the main three, Wonder Woman is very energetic and and eager for battle.
- Most Common Superpower: She wouldn't be Wonder Woman without them.
- Ms. Fanservice: She's drawn with an Impossible Hourglass Figure and is well-endowed. Expected something else from Wonder Woman?
- Running Gag: Wonder Woman gets wrapped up in her own Lasso of Truth quite often.
- Single Woman Seeks Good Man: She's dating Superman because he's someone who cares for the real her, not just her superhero persona.
Shazam
Shazam! (Billy Batson)
Voiced by: Sean Astin
- Kid Hero: He's kid with the ability to magically transform into the Semi-Divine Shazam.
- Gentle Giant: When he's Shazam, he's as tall as Superman.
- Ink-Suit Actor: Both Billy and Shazam bear more resemblance to Sean Astin than the usual straight-black-haired Captain Marvel. Just a really buff Sean Astin in Shazam's case.
The Flash
The Flash (Barry Allen)
Voiced by: Charlie Schlatter
- Composite Character: He's Barry Allen, but his characterization has more in common with Wally West.
- In one of the shorts, he takes on the Roadrunner's role and quotes Bugs Bunny.
- Demoted to Extra: Most Justice League stories feature The Flash in a major role, since he's a founding member of the team. He's barely seen in this show.
Green Arrow
Green Arrow (Oliver Queen)
Voiced by: Chris Diamantopoulos
- The Ace: He's an expert fighter and master archer.
- A Day in the Limelight: He's one of the most recurring characters in the show.
- Beware the Nice Ones: While he's very social, friendly and likes to crack one-liners and jokes, when he gets serious, he gets serious.
- Overshadowed by Awesome: While he's a skilled and resourceful street vigilante, many doesn't take him seriously due to Batman's reputation and position in the League.
Green Lantern
Green Lantern (Hal Jordan)
Voiced by: Josh Keaton
- Adaptational Personality Change: He's still cocky, but this version of Hal also has a tight grip on the Idiot Ball. He's more like a toned-down Guy Gardner than Hal Jordan.
- Adaptation Dye-Job: His hair is black instead of brown.
- Composite Character: While Hal Jordan, his personality is closer to Guy Gardner's and the aforementioned Adaptation Dye-Job of having black hair instead of brown makes him resemble Kyle Rayner.
- Demoted to Extra: Despite being a founding member of the Justice League in most incarnations, he doesn't appear as often as other characters in this show.
Martian Manhunter
Martian Manhunter (J'onn J'onzz)
Voiced by: Crispin Freeman
- Adaptational Personality Change: He is shown as more naive and active than other adaptations.
- Demoted to Extra: He's usually a major character in Justice League adaptations thanks to being a founding member of the team in the comics (at least, before the New 52 reboot). Here, however, he only made a few appearances.
Blue Beetle
Blue Beetle (Jaime Reyes)
Voiced by: Jake T. Austin
- Legacy Character: Presumably, Jaime is still the third Blue Beetle.
- Spider-Man Send-Up: Jaime appears to be much closer to Spider-Man in design than previously. In costume, he lacks a mouth and his eyes are large with nothing inside them.
Booster Gold
Booster Gold (Michael Jon Carter)
Voiced by: Diedrich Bader
- Adaptational Backstory Change: In the comics, he went back in time to get rich because he had just been exposed for deliberately losing football games for his father's gambling, which led to him getting kicked out of his college football team and being expelled from university. He got a job as a janitor at a superhero museum, which gave him the idea to use the superhero gear to travel back in time to get rich. The show takes the former college football player and gambling father parts out, but his reason for getting rich is because he wanted to have money to support his marriage.
- Alliance of Alternates: In "Watchtower Tours", he summons the assistance of several alternate timeline counterparts of himself, including one where he chose to stay in bed today and one who never knew love.
- Attention Deficit... Ooh, Shiny!: By his own admission, he has a super short attention span.
- Awful Wedded Life: Margo became Red Velvet not because he left her at the altar, but because he turned out to be a terrible husband.
- Brilliant, but Lazy: HOO BOY! Booster can be a very creative and useful crime-fighter when he bothers to focus. Of course, getting him to focus is a superhuman feat in and of itself.
- Crouching Moron, Hidden Badass: When he's on League duty, he comes across as a self-centered and lazy slacker. But when things get serious, especially when the timestream is in danger, Booster is extremely serious and professional. In fact his few silly moments in "Time Out" were mostly the result of him trying extra hard to impress Batman.
- A Day in the Limelight: He's one of the most recurring characters in the show.
- Demoted to Extra: Compared to his past appearances alongside Booster, Skeets is more or less reduced to a background prop here.
- Forgotten Aesop: After spending the entirety of "Time Out" showing us that Booster is specialized, not stupid, "Watchtower Tours" and "Phased and Confused" revert him back to useless idiot, and "Booster's Gold" combines that with irresponsible use of time travel.
- The Friend Nobody Likes: Not very well liked by the other leaguers, usually Batman. Though later episodes show that they do have some faith in Booster's desire to ultimately do the right thing.
- The Greatest Story Never Told: As the Trope Namer, it turns out he also suffers from this in this version. We learn that he defends the timestream from corruption, something that no one else knows about. Why? Because You Never Asked. Although it's implied that another reason is so that the wrong people don't get the idea to stop him and mess up the timestream. When Batman learns about this in one episode, having been berating him earlier in the episode for being irresponsible, he apologizes for underestimating Booster and tells him that he's a good person before circumstances force them to erase Batman's memory of it.
- Inter-Class Romance: In his proper era, Booster was a security guard who fell hard for heiress Margo Montgomery. She loved him regardless of status, but he considered himself Unable to Support a Wife, so he came to the 21st century to get rich as a superhero.
- The Voiceless: His Robot Buddy Skeets is completely mute in this series.
- What You Are in the Dark: He calls himself the superheroes' "rat guy" — he's the guy that does the minor heroic jobs that nobody else wants to do. Of course, he never tells anyone this because You Never Asked and nobody would believe it to be anything more than another empty brag unless they see it in person like how Batman did.
- You Never Asked: It turns out he frequently keeps the timestream from being corrupted, which Batman discovers in one episode. Surprised at his ability to take responsibility for something as huge as that, Batman asks him why he never told anyone this, which Booster answers with this trope (as opposed to, say, not wanting the wrong person to find out and get an idea...) Considering how critical his role is, this is probably for the best.
Plastic Man
Plastic Man (Patrick "Eel" O'Brian)
Voiced by: Dana Snyder
- The Friend Nobody Likes: Even more so than Booster Gold if that's possible. Plastic Man is at the bottom of the totem pole — he's outranked by both the League Supercomputer and Superman's dog Krypto.
- Laughing at Your Own Jokes: In "Unleashed", he's the only one laughing at his cracks about Dex-Starr not watching where he's going and getting caught in the line of doodie after capturing the Red Lantern by turning into a litter box.
- Lethal Joke Character: He's considered by Brainiac to be one after he ends up thwarting his plans, destroying his ship and saving the worlds he shrank. In response, Brainiac declares him the highest priority target on Earth, overtaking Superman.
- Rubber Man: Half his powerset is the ability to stretch his body.
- Technically Naked Shapeshifter: His various costumes are just part of his rubbery, shapeshifting body. Firestorm is squicked out by this revelation.
- Voluntary Shapeshifting: The other half of his powerset consists of changing into any form he can think of.
Hawkman
Hawkman (Katar Hol)
Voiced by: Troy Baker
"Ugh, super PDAs are the worst."
- Deadpan Snarker: He shows this in "Repulse", where he's quite sarcastic during the fight that interrupted Superman and Wonder Woman's date.
- Demoted to Extra: He's usually a prominent Justice League member, but here only makes brief, sporadic appearances.
Cyborg
Cyborg (Victor Stone)
Voiced by: Khary Payton
- Adaptational Comic Relief: He's either a toned-down version of his Teen Titans Go! incarnation or a more carefree version of his depiction in the 2003 animated series.
- Bunny Ears Picture Prank: He gives Superman bunny ears in "Plastic Man Saves the World".
- Cyborg: He's half-man and half-machine, as you can tell from his codename.
Supergirl
Supergirl (Kara Zor-El)
Voiced by: Joanne Spracklen
- Beauty Is Never Tarnished: Subverted in "Keeping Up With The Kryptonians", when she lets out a loud, unladylike burp after eating Ma Kent's blueberry pie.
- Grand Theft Me: Felix Faust possesses her in "The Goddess Must Be Crazy".
- Valley Girl: Becomes one when Mister Mxyzptlk rewrites history so she was raised in Hollywood in "Keeping Up With The Kryptonians".
Mister Terrific
Mister Terrific (Michael Holt)
Voiced by: Hannibal Buress
- Child Prodigy: He was this in college, sharing a room with the much older Martin Stein.
- Insufferable Genius: Very smug and arrogant in his abilities, which drove Martin Stein crazy. It was a coping mechanism for rooming with the very smart Stein. However, he is modest enough to rank himself the third smartest man in the world.
- Smarter Than You Look: He's generally chill and laid back, but can be very resourceful in a fight.
Doctor Fate
Doctor Fate (Kent Nelson)
Voiced by: ???, Erica Luttrell (young)
- Demoted to Extra: He's only seen once, and doesn't do much.
Vixen
Vixen (Mari McCabe)
Voiced by: Jasika Nicole
- Adaptational Modesty: Unlike the comics and the DCAU's Justice League counterpart, her breast size (and by extension, her cleavage) has been toned down.
- Animal-Themed Superbeing: She uses a magical totem to activate animal-based abilities.
- Demoted to Extra: She barely appears in the show, only appearing in some fights.
The Atom
The Atom (Ray Palmer)
Voiced by: Jerry O'Connell
- Nice Guy: He's a pretty good person.
- "Not Wearing Pants" Dream: When he enters Sinestro's ring in "The Ringer", the first hallucination he experiences has his fellow superheroes and a crowd of civilians point and laugh because he's wearing nothing but his mask and his underwear.
- Science Hero: Batman explicitly states that the Justice League wants him for his mind when Atom expresses his insecurities on not being a "big, fighty" type
Zatanna
Zatanna Zatara
Voiced by: Lacey Chabert, Dayci Brookshire (young)
- Bound and Gagged: During "Speed Demon", a possessed Batmobile binds and gags Zatanna with the ejection parachute, and locks her in the trunk◊. Zatanna remains captive in the Batmobile trunk until rescued by Batman.
- Deadpan Snarker: She's definitely sarcastic around others.
- Energy Ring Attack: In "Speed Demon", Zatanna uses a spell that creates energized Rings of Death while fighting Brother Night's stone creatures.
- Ms. Fanservice: Her magician attire shows off her toned legs and figure.
Stargirl
Stargirl (Courtney Whitmore)
Voiced by: Natalie Lander
- Adaptational Modesty: In the comics, her outfit bares her midriff, but here, it doesn't do that.
- Adaptational Personality Change: She was given a more child-ish and naive personality (of course, it is possible that she is simply younger than usual, which would explain it easily enough).
- A Day in the Limelight: She's one of the most recurring characters in the show.
- Babysitter Friendship: Has a great relationship with her client, Timmy.
- Badass Adorable: She coos over alien cats (even three-eyed ones with extra-long tongues), she's very sweet with Timmy as his babysitter, and she has a reciprocated crush on Firestorm (who's a complete dork).
- Long Hair Is Feminine: She's very girly and her hair is ankle-length.
- Nice Girl: She's very sweet and open-hearted.
- Single Woman Seeks Good Man: She has a crush on Firestorm, who is a Nice Guy.
- Smart Girl: She's into things like molecular gastronomy.
Firestorm
Firestorm (Ronnie Raymond)
Voiced by: P. J. Byrne (Ronnie Raymond) / Stephen Tobolowsky (Professor Stein)
- Adaptational Comic Relief: Ronnie Raymond's personality is quite exaggerated in this version.
- A Day in the Limelight: He's one of the most recurring characters in the show.
- Book Dumb: Ronnie is quite creative, but he isn't the most adept student and doesn't use his transmutation abilities all that much because it requires him to memorize the exact structure of the material he's transmuting. He nearly has a mental breakdown while trying to process Kryptonite's chemical formula.Firestorm: You think I'm Stephen Hawking?!
- Character Catchphrase: "The heat is on!"
- Comes Great Responsibility: Spoofed after he defeats General Zod by converting the ice of the North Pole into Kryptonite.Firestorm: With great powers comes a great big butt-kicking!
- Crouching Moron, Hidden Badass: He may be a goofball, but he's surprisingly creative and his transmutation and intangibility are extremely powerful - not to mention the fact that he's a walking nuclear reactor.
- Dating Catwoman: He has a bit of a thing for Killer Frost, though this is largely overtaken by his feelings for Nice Girl Stargirl.
- Hidden Depths: “Garden Of Evil” shows he’s pretty good at tactical, on-the-fly planning.
- Nice Guy: Ronnie’s a bit dim, but he’s pretty nice.
- Opposites Attract: A literal case with Killer Frost, and to a lesser extent with Stargirl (their personalities are very similar, but she's a great deal smarter and more intellectual than he is).
Etrigan
Etrigan (Jason Blood)
Voiced by: Patrick Seitz
- Adaptational Nice Guy: Etrigan is a demon from Hell who in the comics is usually only on the side of good because he's forced to be or his personal interests are aligned with the heroes (and at times is willing to betray the heroes should doing so serve his interests better). Here he's a playful and enthusiastic participant in the adventures who doesn't need any coaxing to fight the forces of evil.
- Blood Knight: He loves a good fight.
- Deadpan Snarker: As Jason Blood, Etrigan has a fairly dry sense of humor, such as asking if Batman has gone to a mechanic when he says there's a (villain-related) problem with the Batmobile.
- Large Ham: He can be over the top at times.
- Rhymes on a Dime: As Etrigan, his speech is all in rhyme.
John Constantine
John Constantine
Voiced by: Damian O'Hare, Paula Rhodes (young)
- Adaptational Badass: He's now able to stand up to Superman and Black Adam-level threats with ease, and is likely the most powerful caster of magic who doesn't have a beard (like Merlin and Shazam's wizard).
- Adaptational Heroism: Played with. While he's still a good guy in the comics, he's a smarmy, cynical, self-centered, chain-smoking, alcoholic con man with a low opinion of superheroes and a habit of pushing people away in the comics. Here, he's a deadpan, wise-cracking sorcerer and paranormal investigator with a much friendlier but still smarmy personality, and he's also a member of the Justice League.
- Anti-Hero: He may be a member of the Justice League, but in "Supernatural Adventures in Babysitting" he doesn't hesitate to pocket the spell book the villain was after instead of returning it to its owner. It's also implied that he did something unsavory to the Brothers Djinn, but we'll never know what since his explanation was hindered by the Accent Exaggeratus spell.
- Expy: Constantine's personality here is highly reminiscent of Harry Dresden.
- Frothy Mugs of Water: It's only obvious in "Trick or Threat," but if you look closely Constantine's chain-smoking has been replaced with chain-lollipop-eating.
- Handwave: In the first episode, his Cockney accent and mannerisms are exaggerated. Batman explains that he was hit by an Accent Exagaratus Spell by a warlock the previous week.
- Kleptomaniac Hero: He's picked up the keys to the House of Mystery and kept the Magdaline Grimoire for himself instead of returning it to its owner.
Swamp Thing
Swamp Thing
"Appearances aside, I’m more of a sun shining life preferring creature."
Voiced by: Mark Hamill
- Adaptational Personality Change: Swamp Thing is a lot more cheery and upbeat compared to his comics self. Not that he wasn't caring or compassionsite, but he tended to be much more serious and reserved than as he's portrayed here.
- Deadpan Snarker: He is the snarkiest character in the entire series, and makes a good amount of snarky quips.
- Fighting from the Inside: When Poison Ivy brainwashes him, he keeps trying to break free from her control and gives fellow Leaguers tips on how to stop him.
- Hero with Bad Publicity: Subverted. He thinks he has this reputation, but the end of “Zombie King” shows he’s actually quite popular and beloved by the citizens of New Orleans.
- Knight in Sour Armor: He’s quite cynical and snarky, but at the end of the day he’s a Nice Guy.
- Nice Guy: Despite his misgivings about humanity, he’s always on the front lines to protect people and considers his fellow League members friends.
- Was Once a Man/That Man Is Dead: Implied in “Zombie King”.
Swamp Thing: Humanity. I do not miss it.
Others
Jonah Hex
Jonah Hex
Voiced by: Trevor Devall
- Combat Pragmatist: When Space Cabbie warns him not to shoot the windows of the space train because they'll be sucked out into the vacuum of space, he immediately shoots them out so their enemies will sucked out instead.
- Deadpan Snarker: He has a sense of sarcasm.
- Fish out of Temporal Water: Was from the good ol' days of the Wild West but after being turned into a Human Popsicle ended up being defrosted in the future.
- Guns Akimbo: Pilfers some dual laser pistols from the JL's cargo in order to properly fight the Alien Trainjackers, he takes a liking to them but they don't last long sadly.
- Human Popsicle: Was out hunting down a criminal in a snowstorm but fell down a crevice, freezing him into a block of ice. He was found by the Justice League and was about to be sent to the Watchtower. But after the vehicle transporting was hijacked, the League was forced to defrost him in order to help Space Cabbie out.
- Seen It All: Isn't too perturbed by the fact that he was defrosted in the future and is currently in a Space Train being hijacked by criminal aliens.
Space Cabbie
Space Cabbie
Voiced by: Patton Oswalt
- Adaptational Badass: He's able to help Superman in his chase against Lobo and outwit Mister Mind, one of the smartest villains in the DCU. He even manages to trick Kanto, Darkseid's personal assassin!
- Badass Bystander: He is not a superhero, yet he has helped the Justice League take down many baddies over the series.
- Badass Driver: You’d have to be when you frequently run into and survive encounters with supervillains on a regular basis using only your driving skills.
- A Day in the Limelight: He's one of the most recurring characters, despite having no super powers and never becoming a member of the Justice League.
- Heroism Wont Pay Thebills: He's happy to help the Justice League, but still insists on getting his fare. It's his job, after all.
Mister Miracle
Mister Miracle
Voiced by: Roger Craig Smith
- Attention Whore: He's very desperate for attention from a loving audience. Batman even lampshades it when he finds him hidden inside a container:I don't have to be the world's greatest detective to know there was no way you were going to leave a standing ovation.
- Jerk with a Heart of Gold: For all he does to inflate his ego, he isn't hesitant to help Big Barda.
- Large Ham: He's pretty bombastic and over the top.
Big Barda
Big Barda
Voiced by: Laura Post
- Jerk with a Heart of Gold: She may have a temper, but she's also altruistic.
- Non-Standard Character Design: Even given the stylized designs on the show, Barda is drawn with huge, cartoony eyes that blend with her helmet, and a round comic-strip-esque face.
- Violently Protective Girlfriend: In "It'll Take A Miracle!", when one of Darkseid's minions is about to stab Mister Miracle, she angrily knocks him away after saying "That's my boyfriend!"
The Riddler
The Riddler (Edward Nygma)
Voiced by: Brent Spiner
A reformed supervillain-turned Private Detective.
- Adaptational Heroism: Based on the "Edward Nygma, Private Eye" period of the Riddler's life and therefore appears as a reformed crook who helps the Justice League.
- Evil Is Petty: He may be reformed, but he got into a feud with the Joker when he absentmindedly stole Joker's donut. Joker retaliated by stealing his gimmick, and Riddler retaliated by helping the League solve the riddles.
- Insufferable Genius: Even if he is on the good guys' side now, he looks down on Green Arrow and Wonder Woman for not being as quick at solving riddles as he is and even rubs it in their faces that they couldn't have saved Batman and stopped the Joker without the assistance of his intellect at the end of his episode.
Bizarro
Bizarro
Voiced by: Travis Willingham
A stupid, but well-meaning clone of Superman who seeks to join the Justice League, oblivious that none of the Justice League like him.
- Abhorrent Admirer: To Wonder Woman.
- Adaptational Heroism: While he's not an outright bad character in the comics, he usually ends up causing more harm than good. Here, Flash corrects Martian Manhunter's assumption that Bizarro is evil, and he actually helps the Justice League defeat Amazo.
- An Ice Person: He has freeze vision.
- Character Catchphrase: "Booray!"
- Cloudcuckoolander: As is usual for Bizarro. He thinks Space Cabbie is the world's greatest genius for giving him directions he didn't even follow and celebrates losing.
- Gretzky Has the Ball: He plays mini-golf by throwing his club, calls "Five!" instead of "Fore!", doesn't bother to hit any of the holes, swings his club like one would in normal golf, and celebrates a hole in hundreds.
- Hulk Speak: He still has his trademark mix of this and opposite-speak.
- Oddball Doppelgänger: Even putting aside his odd logic and reversed powers, he has a much deeper voice than Superman and wears a reversed S-Shield and Underwear of Power.
- Secondary Color Nemesis: Subverted. The red-and-blue parts of his costume are more purplish than Superman's, but he's not evil by any margin.
- Underwear of Power: Despite Superman himself not having those thanks to having a more New 52-inspired design, Bizarro keeps his. He can get away with it because, well...he's weird that way.
Cain
Cain
Voiced by: Trevor Devall
A mysterious bearded, bespectacled man associated with the House of Mystery.
- Breaking the Fourth Wall: He directly speaks to the audience and addresses them as "kiddies".
- Horror Host: Appropriate enough, given his role as the presenter of the House of Mystery comic's stories, the Halloween Episode "Trick or Threat" is done in the style of a horror anthology and has him serve as the narrator.
Supervillains
The Brothers Djinn
The Brothers Djinn
Abnegazar voiced by: Damian O'Hare
Rath voiced by: Jason O Hare
Nyorlath voiced by: Chris Diamantopoulos
Uthool voiced by: Diedrich Bader
Calythos voiced by: David Lodge (American Actor)
- Adaptational Badass: Ghast is left out of the original lineup, but when he does appear in a later episode, it's as a full-on kaiju-sized Eldritch Abomination.
- Ascended Extra: Calythos, Uthool, and Nyorlath are seen as actual characters here for the first time in anything ever. In the comics, The Green Bell of Uthool, the Silver Wheel of Nyorlath, and the Red Jar of Calythos are the artifacts needed to summon the Demons Three (Abnegazar, Rath, and Ghast, two of which appear in part four. Ghast would turn up later down the line.) but just who or what the names Calythos, Uthool, and Nyorlath mean has yet to come up.
- Demonic Possession: Uthool's ability. He's able to boost the strength of his host to the degree that he becomes as strong as Superman.
- Power Copying: Calythos' ability, further enhanced by taking over Superman villain the Parasite. Unfortunately (for him; fortunately for the world) he, like Parasite, he takes on the weaknesses too.
- Starter Villain: They're a lot more powerful than most starter villains, to the point that you'd have to go all the way up to Darkseid-class heavy hitters to come up with villains who outrank the Djinn at full strength. In fact, the use of such powerful foes right from the get-go is quite surprising given the Lighter and Softer nature of the series, and it makes almost every other villain seem weaker by comparison. However, they get the cast onscreen and working together, demolish the Hall of Justice in a big battle so the Watchtower that will be the base for the rest of the series will be created, and never show up again after being banished from this reality by John Constantine.
- What Happened to the Mouse?: Done deliberately; Constantine was suffering from an "Accent Exaggeratus" spell, he was pretty unintelligible when saying just where he sent the Djinn. As such, we will never know their final fate.
Darkseid
Darkseid
Voiced by: Jonathan Adams
- Archnemesis Dad: He acts as an adoptive version to Mister Miracle in "It'll Take A Miracle!"
- The Comically Serious: Darkseid remains completely within character even when doing things like riding a taxi and giving Space Cabbie a coin with his face on it.
- Evil Sounds Deep: As in basically all of his other televised experiences, he has a deep, menacing voice.
- Not So Stoic: He looks visibly shocked when Mister Miracle manages to steal his Mother Box and is preparing to boom-tube him away.
Granny Goodness
Granny Goodness
Voiced by: Cloris Leachman
- Adaptational Comic Relief: While earlier versions had her funny moments as well, they were mostly for he grandmotherly pet naming and insults. This version leans more into Deadpan Snarker territory, the type her actress was known for.
- Deadpan Snarker: When Kalibak asks if Sid Sharp (whom the Parademons have kidnapped thinking he's Superman) isn't the Man of Steel, she quips "This little fish isn't even the man of oatmeal.".
- Evil Old Folks: She's very old and works for Darkseid.
- Paper-Thin Disguise: When she tags along on Booster Gold's tour of the Watchtower, she doesn't bother disguising herself beyond a pair of sunglasses, which she herself lampshades by addressing that it is barely a disguise.
Steppenwolf
Steppenwolf
"Once I beat you, I will forever be the warrior who bested Superman. Even Lord Darkseid will be impressed."
Voiced by: Peter Jessop
- Dirty Coward: For all his bloviating, Steppenwolf isn't interested in a fight unless he has an enormous advantage.
- Egomaniac Hunter: Steppenwolf abducts Superman to play The Most Dangerous Game and prove his superiority.
- Wolverine Publicity: Steppenwolf's appearance early on in Justice League Action served to acquaint viewers with his character before he showed up in Justice League (2017). In previous non-comic media, most of Darkseid's supporting cast have only been Easter Eggs.
- X-Ray Sparks: He tries to best Superman by teleporting him to a planet with a red sun in "Under a Red Sun", but Supes manages to beat him without his powers anyway and the villain is subjected to the old "skeleton revealed by electrocution" gag for his troubles.
Kalibak
Kalibak
Voiced by: Piotr Michael
- "Well Done, Son" Guy: In "Superman's Pal, Sid Sharp", he hopes to get a hug from his father Darkseid for capturing Superman.
- You No Take Candle: This is his default mode of speech. Case in point: when Sid Sharp insults his and Granny Goodness's appearances, he says "Mother say I very handsome."
The Joker
The Joker
Voiced by: Mark Hamill
- Actor Allusion: He and Trickster are both voiced by Mark Hamill. In "Missing the Mark", the two villains kidnap the man himself and get fooled when he impersonates their voices to give them misleading directions.
- Adaptational Comic Relief: While still fairly dangerous, the series significantly plays up the goofy prankster aspect of the character, to the point that his reason for stealing Riddler's shtick is because Riddler ate his donut.
- Adaptational Nice Guy: While Joker is still a villain, he is made into more of a prankster rather than a maniacal Serial Killer that most works portray him as.
- Affably Evil: Flits between this and Faux Affably Evil. There are many instances where his politeness seems to be genuine, such as his feelings of friendship with Lex.
- Batman Gambit: Pulls two of these.
- In "Best Day Ever", when he acquires a Mother Box, he uses it to teleport him and Lex all over the world, banking on the many superheroes giving chase, where he would lure them all.. straight into the blast radius of a bomb.
- In "E. Nigma, Consulting Detective", he pulls one on Riddler, setting up a death trap which is activated only by answering a riddle, knowing fully well that Riddler couldn't resist the urge to answer.
- The Chessmaster: Has pulled off some impressive manipulations of both heroes and villains alike and has had several Near Villain Victories.
- Evil Has a Bad Sense of Humor: Previous incarnations of the Joker were funny in a Black Comedy sort of way. In "Galaxy Jest," he gets an actual chance to perform comedy for an audience, and can't come up with a single joke less than forty years old.
- "Oh, Crap!" Smile: When Mongul orders him to make the warriors of Warworld laugh, he eventually succeeds by using a joy buzzer on Mongul, but then smiles nervously after seeing that he's just pissed Mongul off.
- Reused Character Design: His look is, barring some color modifications, very similar to his DC Animated Universe incarnation.
- Villains Out Shopping:
- He breaks Luthor out of prison and takes him out on a holiday, though the latter isn't remotely pleased.
- He infiltrates Booster's tour of the Watchtower alongside Granny Goodness and Toyman disguised as a woman via Latex Perfection. And unlike the other two, he had no sinister intent beyond sneaking in.Booster Gold: Are you kidding me?! I suppose you brought some kind of poisonous gas?
Joker: No, I just really came for the tour! Got this idea from an old Bugs Bunny cartoon! (Evil Laugh)
Harley Quinn
Harley Quinn (Harleen Quinzel)
Voiced by: Tara Strong
- Affably Evil: She may be a bad guy, but she's still very jovial and personable.
- Composite Character: She takes Lois Lane's role as Titano's Morality Pet.
- Pet the Dog: "Harley Goes Ape" shows her most sympathetic side to date. note
- Plucky Comic Relief: She provides a lot of the show's humor.
- Villainous Friendship: Just like in the comics and in several adaptations, she gets along with Poison Ivy.
Black Adam
Black Adam (Teth-Adam)
"It's Black Adam now, old man, and I'm taking your throne. What’s it look like?"
Voiced by: Gary Cole
- Adaptational Badass: In this series, not only does he still have his usual powers, he can now cast spells and use his Black Lightning as an Imagination-Based Superpower.
Sinestro
Gorilla Grodd
Gorilla Grodd
Voiced by: David Sobolov
- Four-Fingered Hands: And feet, Grodd — and all gorillas in the show — are depicted like this.
- Killer Gorilla: As usual in any media.
Klarion
Klarion the Witch Boy
Voiced by: Noel Fisher
- Evil Is Petty: In "Supernatural Adventures in Babysitting," Klarion's fatal mistake is refusing to keep an easy promise to a child.
- Psychopathic Manchild: Klarion indulges his sadism on a regular basis.
- Squishy Wizard: He's more powerful than Constantine, with the latter conceding in "Supernatural Adventures in Babysitting" that his magic is no match for Klarion's. On the other hand, his fist very much is.
Trickster
Trickster (James Jesse)
Voiced by: Mark Hamill
- Actor Allusion: He and Joker are both voiced by Mark Hamill. In “Missing the Mark”, the two of the, kidnap the man himself and get fooled when he impersonates their voices to give them misleading directions.
Killer Frost
Killer Frost (Caitlin Snow)
Voiced by: Mena Suvari
- Anti-Villain: Is ultimately just a fangirl proven Eviler than Thou by Mister Freeze, and so she remains sympathetic.
- Ascended Fangirl: Was a huge fan of Mister Freeze and was honored to work with him. This turned out to be an awful idea when Freeze ends up using her as a living battery, forcing her to help take him down.
- Composite Character: Is visibly Caitlin Snow, but much like the CW's Caitlin takes Crystal Frost's shtick of being into Firestorm (though, like the CW, Ronnie as opposed to Stein).
- Dating Catwoman: "Dating" may be taking it far, but she does seem to reciprocate Firestorm's feelings.
- Enemy Mine: Helps Firestorm fight Mister Freeze when their partnership stops working out.
- Hazy-Feel Turn: She may or may not have switched sides at the end of her first episode, but either way she decks Firestorm in the eye and runs.
Solomon Grundy
Solomon Grundy
Voiced by: Fred Tatasciore
- Adaptational Nice Guy: This version of Grundy pulls a Heel–Face Turn of sorts with a big Pet the Dog moment.
- Adaptational Intelligence: He's typically been shown as a Dumb Muscle henchman for most of the more brilliant villains, but he was able to make a really good plan in "Zombie King".
- Pet the Dog: In the Christmas episode, he sees on TV (at Green Arrow's Christmas party - It Makes Sense in Context) that he scared a little girl when she was going to ask Santa for a teddy. He's been given a little five dollar teddy as part of a Secret Santa mix-up (and to calm him down), and promptly escapes the entire League to apologise to the little girl and give her the teddy.
Calculator
Calculator (Noah Kuttler)
Voiced by: Ely Henry
- Adaptational Badass: He managed to split Firestorm back into Ronnie Raymond and Martin Stein. For bonus points, the Calculator is usually an Ineffectual Sympathetic Villain when in costume and only ever succeeds as a Knowledge Broker, but this version has no problems busting out a costume and going after a superhero directly.
- Composite Character: His design (a black full body suit with tron lines), the fact that he fights Firestorm and managing to separate Ronnie Raymond and Martin Stein, makes him a composite of the hero's arch nemesis Multiplex. He also performs a Doppelgänger Spin using holograms which seems to be a Mythology Gag to Multiplex's Self-Duplication abilitiy.
- Expy: He's basically Multiplex but without the Self-Duplication.
- Psychopathic Manchild
- Tron Lines: Has this on his costume.
Lex Luthor
Lex Luthor
"This should contain enough firepower to launch "big blue" into the black!"
Voiced by: James Woods
- Adaptational Comic Relief: This may be the first version of Lex Luthor since the Gene Hackman real estate mogul version to have this much of a sense of humor.
- Adaptational Personality Change: He's also a much more hands-on villain this time, thanks to a Powered Armor that turns him into an evil Iron Man.
- Arch-Enemy: As always, to Superman. Most episodes where he's the villain usually have him trying to defeat the Man of Steel.
- Bald of Evil: As usual, Luthor is a bald supervillain.
- Charlie Brown from Outta Town: Pulls this off as the super-powered villain "Repulse."
- Chronic Backstabbing Disorder: He's teamed up with Circe, Chronos, and the Joker, and betrayed all of them (though in his defense, the latter did drag him into a partnership without his consent).
- Deadpan Snarker: Whenever he teams up with the Joker or Chronos.
- Evil Is Petty: In "Race Against Crime", he betrays Chronos because of his annoying voice.
- Insufferable Genius: Extremely confident in his intelligence, to the point he makes Mr. Terrific look modest by comparison.
- Skewed Priorities: He likes having hair more than he likes the powers of Zeus.
Poison Ivy
Poison Ivy
Voiced by: Natasha Leggero
- And Now You Must Marry Me: "Garden of Evil" has her try to make Swamp Thing her husband.
- Green Thumb: As usual for Ivy, she has control over plants.
- Villainous Friendship: Just like in the comics and in several adaptations, she gets along with Harley Quinn.
Lobo
Lobo
Voiced by: John DiMaggio
- Adaptational Nice Guy: This Lobo's villainy is greatly toned down for the setting of a kid's show, with him mostly seeking to collect bounties but otherwise tends to avoid killing anyone.
- Butt-Monkey: This version of Lobo rarely accomplishes his tasks and is often on the receiving end of humiliaton.
- Badass Biker: As always, rides his trusty space hog.
- Fourth-Wall Observer: He is able to push a screen cutaway with his hand.
- Expy: Lobo and Flash's roles in one episode are clearly taken from, and an homage to, Wile E. Coyote and the Road Runner
- Fantastic Racism: He doesn't think much of Thanagarians, calling Hawkman a "chicken"
- No Celebrities Were Harmed: He looks and talks like Randy Savage.
Mr. Mind
Mr. Mind
- Voiced by: Oliver Vaquer
- Cute Is Evil: Is called "cute" for his small size in his bio, and is certainly cartoonier than his other iterations. However, this does nothing to undermine his cunning.
- From a Single Cell: Being a worm, he is able to regenerate as long as a portion of him remains intact, as seen in "Follow That Space Cab!".
- Talking Lightbulb: His radio transmitter glows green when they translate his brainwaves in this iteration.
Felix Faust
Felix Faust
Voiced by: Jon Cryer
- Adaptational Attractiveness: Deliberately invoked. His first appearance involves summoning a creature of destruction to attack this plane of existence which restores his youth.
- Berserk Button: You can destroy his other evil minions, but leave the one who's carrying his snacks alone.
- Deadpan Snarker: By far the snarkiest version of Faust, to the point that half is fight with Zatanna is simply him hurling insults at her"What have we learned? My kung-fu is better than your kung-fu!"
- Laughably Evil: He rides around on a segway. That is all.
- Lost Food Grievance: In "Forget Me Not", when Firestorm turns his army of stone golems into cars, he is especially pissed when it happens to the golem who was carrying his sandwiches.
Toyman
Toyman (Hiro Okamura)
Voiced by: Ken Jeong
- Adaptational Villainy: The Hiro Okamura Toyman was an ally of Superman in the comics. Here he's just as much of a villain as previous incarnations.
- Blush Stickers: Has these on his face which make him look even more childish.
- Composite Character: He's Hiro Okamura's version of Toyman, but is more evil much like his mainstream counterpart.
- Jerk with a Heart of Jerk: Toyman forces the heroes he's captured into a Deadly Game but gets Endearingly Dorky throughout it, and starts complimenting Cyborg as a Worthy Opponent before abruptly cheating outrageously and smugly rubbing in his victory.
- Marionette Master: He has an army of robotic toys fight on his behalf.
- Mythology Gag: One of his robots has the same color scheme as the Jack Nimball version of Toyman.
- Paper-Thin Disguise: He wears a fake mustache to impersonate a tourist in "Watchtower Tours".
- Playful Cat Smile: Sports a villainous version of this after he jumps on Cyborg's gaming console and forces him to choose Batman and Cyborg is upset due to the unfair matchup.
- Psychopathic Manchild: He's a demented and dangerous felon obsessed with toys and games. Superman even calls him "maturity-challenged."
- Rogues' Gallery Transplant: Toyman is mostly a Superman villain, though here he's treated as one for Cyborg. However, Superman does refer to him as an old nemesis.
- Wicked Toymaker: As expected of him, he uses weaponized toys in his schemes.
General Zod
General Zod
Voiced by: Jason J. Lewis
- Comic-Book Fantasy Casting: Visually, he's based most off of Michael Shannon's version.
- Kneel Before Zod: The trope namer himself says this in "Phased and Confused".
Atrocitus
Atrocitus
Voiced by: Michael Dorn
- Adaptational Heroism: He's a Reasonable Authority Figure who teams up with the Justice League against Lobo in his debut appearance, while most other continuities would have it the other way around.
Parasite
Parasite (Rudy Jones)
"This appetizer beats prison food, Superman. And now, here you are, the main course!"
Voiced by: Max Mittelman
- Adaptational Ugliness: While in the comics Parasite wasn’t particularly handsome, this Parasite is laden with Body Horror and barely resembles a man. Only his post-Crisis self comes anywhere close to being as monstrous as this version.
- Body Horror: He barely resembles a man, and can sprout tentacles to absorb people’s powers.
Red Velvet
Red Velvet (Margo Montgomery)
Voiced by: Dania Ramirez
Booster Gold's fiancee from his time. He left her at the altar, which lead to her becoming a supervillainess, fueled by revenge.
- The Bad Guy Wins:She succeeded in preventing her past self from marrying Booster. May count as a Pyrrhic Victory, as it also resulted in her supervillain self being erased from the timeline.
- Canon Foreigner: She was made for the show.
- Expy: Of Star Sapphire, in that she's the love interest of a hero who has become his enemy and uses a Ring of Power.
- Final Boss: The last villain to be faced in the series.
- Hero Killer: The Watchtower crashes with several members of the League in the future because of her.
- Last Episode, New Character: As mentioned above, she appears in the last episode.
- Ret-Gone: After she succeeds in convincing her past self not to marry Booster Gold, she's immediately erased from the timeline.
- Spicy Latina: She's implied to be a Latina because of her tanned skin and Dominican voice actress. Booster outright says Margo has "that fiery blood."
- Woman Scorned: The League assumes she's after Booster because he left her at the altar and she had no idea that he left because he wanted to make enough money to support them in their marriage. Well... he did come back…but he was a horrible husband, and that's why she became evil.
Two-Face
Two-Face (Harvey Dent)
Voiced by: Robert Picardo
- Adaptational Comic Relief: This is the most humorous version of Two-Face, thanks to his personalities getting into arguments repeatedly.
- And I Must Scream: Harvey is able to see all the illegal activities Two-Face partakes in, but is unable to do anything more than protest.
- Evil Sounds Deep: Two-Face speaks in a gruff voice, which really stands out from Harvey's softer tone.
- Split Personality: As per usual. However, the Harvey personality is shown to be able to be able to briefly take over, while most media depicts the evil personality as having total control.
- Two-Faced: He just wouldn't be Two-Face without his face being asymmetrical because of disfigurement.
Deadshot
Deadshot (Floyd Lawton)
Voiced by: Christian Slater
One of the world's greatest assassins, who offers his services to whoever can afford him.
- Butt-Monkey: He's frightened by Superman and Batman's reversed Good Cop/Bad Cop routine and is scared into spilling without the Lasso of Truth just by seeing its effects on Booster.
- Family-Friendly Firearms: He's shown here using lasers instead of traditional guns.
- Go-Karting with Bowser: Tries to join Booster and Wonder Woman in getting ice cream. Wonder Woman has none of it.
- The Stoic: Nothing breaks his cool demeanor.
- Not So Stoic: Seeing Batman and Superman reverse their Good Cop/Bad Cop routine in one of the shorts freaks him out so much he immediately gives them the information they need to make it stop.
Kanjar Ro
Mr. Freeze
Mr. Freeze (Victor Fries)
Voiced by: Peter Stormare
- Adaptational Jerkass: This version lacks the usual Tragic Villain angle with his wife being Adapted Out and is more of a standard "muhaha" power-hungry villain.
- Kick the Dog: Imprisoning Killer Frost to use as a power source was a dick move, especially since she was a huge fan of him and had been completely loyal and helpful.
- Knight of Cerebus: One of the most serious villains in a usually quite silly show, who pulls an Eviler than Thou on others.
Brainiac
Braniac
Voiced by: John de Lancie
- Adaptational Comic Relief: His Control Freak status is Played for Laughs here.
- My Brain Is Big: His head is massive compared to the rest of him.
Others
Space Cabbie's GPS - UNMARKED SPOILERS for "Barehanded"
GPS/Aya
Voiced by: Grey Griffin
Space Cabbie's GPS app, who seems to have a mind of its own...
- Canon Character All Along: Although it is never explicitly confirmed, it is obvious by her green color scheme, her voice, her familiarity with Hal, being an amnesiac AI, and that she feels like she should be looking for something or someone (likely Razer) that she is Aya after the events of Green Lantern: The Animated Series, or at least from a Broad Strokes of it.
- Determinator: After her encounter with Hal, she is inspired by his unwillingness to give up to leave Space Cabbie to go on a journey of self-discovery.
- Foreshadowing: Space Cabbie's GPS is glows green and shares her voice actress with Aya... hmm...
- Fully Absorbed Finale: Aya appearently survived the series finale of Green Lantern: TAS, in which she created a virus which deleted all copies of herself.
- Have We Met?: After Hal leaves, Aya confides to Space Cabbie that something felt familiar about him.
- I Will Find You: Before she leaves Space Cabbie, she says that she feels like she should be looking for something... or someone.
- Identity Amnesia: She's not a navigational app as Space Cabbie may be mistaken to believe, but a disembodied artificial intelligence with no memory of her origin.
- The Lost Lenore: Her encounter with Hal makes her feel that she must search for something…or someone.
- Missed Him by That Much: Neither Hal or Aya recognized each other while Space Cabbie was giving Hal a ride.
- Walking Spoiler: It's hard to talk about "Barehanded" without talking about her last scene.
- Wham Line: At the end of "Barehanded", what she has to say indirectly reveals her true identity and puts Justice League Action and Green Lantern: The Animated Series into a new perspective...GPS: That passenger [Hal]. There was something familiar about him.
Space Cabbie: The Green Lantern? That's a strange thing for a navigational app to say, GPS.
GPS: I'm not a navigational app. I am a disembodied artificial intelligence with no memory of my origin.
Space Cabbie: That's okay! We make a great team! You can stay here in my cab forever!
GPS: Negative. I feel compelled to search for something... or someone. That Green Lantern did not lose hope, and neither will I. [leaves]
Space Cabbie: [Beat] …
Well, that was weird.
