Percy Jackson and the Olympians (2023) / Characters

http://tvtropes.org/pmwiki/pmwiki.php/Characters/PercyJacksonAndTheOlympians2023

For the book versions of the characters, see The Camp Half-Blood Series.

open/close all folders

The Trio

Percy Jackson

Perseus "Percy" Jackson

https://static.tvtropes.org/pmwiki/pub/images/pjo23_percy.png

"Am I a troubled kid? Yeah. You could say that."

Played by: Walker Scobell, Azriel Dalman (young)

Demigod son of Poseidon and Sally Jackson, and head counselor of the Poseidon Cabin. He is the second forbidden child of the Big Three to be born after Thalia Grace, daughter of Zeus.

Adaptational Angst Upgrade: The line "You shall be betrayed by one who calls you a friend" given to him by the Oracle initially haunts him a lot more than it does in the original novel and part of his initial Teeth-Clenched Teamwork with Annabeth or his caginess with Grover comes from the fact that he's Just a Kid who doesn't know who to trust, to the point that he has a minor breakdown about it when Grover pushes to know why Percy is acting the way he is. By the time he defeats Medusa, he seems to have chosen to bury the hatchet and fully trusts both Annabeth and Grover.
Adaptational Badass: In the original novel, Percy only wins the fight against Clarisse and the other members of the red team during Capture the Flag after he's forced into the river and gets a boost of strength. In the series, he's able to take them on three-to-one with little difficulty outside of his native element, and only gets shoved in the river by Annabeth after the fight is over so that his wounds can heal.
Adaptation Dye-Job: Percy is described in the books as having raven hair and sea-green eyes. Here, he is blond and blue-eyed.
Adaptational Intelligence: Percy is not dumb by any stretch of the imagination even in the first book, but this version of Percy seems to be considerably more on the ball about the mythological world, their follies, and their dangers than the ones in the original story, where he was mostly Locked Out of the Loop. This makes him more intellectually critical of the gods and allows him to show great sympathy towards those that have been victims of the gods such as Medusa and Hephaestus. However, he admits that he can still be slow sometimes. He also figures out from Grover nearly being dragged into Tartarus that Kronos is behind everything, and that Luke is in on it because he gave Percy the shoes, neither of which he figured out on his own in the book.
Adaptational Superpower Change: The novels portray Percy as being able to allow himself to emerge from water completely dry if he wants; however, Episode 5 depicts him as still being damp after emerging from water.^note
All-Loving Hero: Despite his flaws, Percy is a deeply compassionate person. He only wants the freedom of his mother from Hades and none of his friends getting hurt on his quest. In "A God Buys Us Cheeseburgers", he has nothing but the utmost sympathy for Hephaestus (already well aware of the god's dismal backstory) and seems to be utterly heartbroken at the fact that the gods treat each other like that, something he learned from his mother. Annabeth points out that maybe Sally essentially kept him separate from the mythological world as long as she did to make sure that Percy didn't grow up to be like the Greek gods and demigods, to be much more empathic and compassionate.
Berserk Button: Never speak ill of Sally Jackson, as Ares learns the hard way.
Beware the Nice Ones: Percy is normally a sweet, easygoing kid. But threaten him, put his loved ones in danger, or betray him in any shape or form... bad idea.
Blessed with Suck: As a demigod, Percy shares some of the powers his father Poseidon has (i.e. healing from water sources and hydrokinesis). However, like his mother tells him, half-bloods are drawn to terrible dangers as they grow older. Percy, being a child of one of the Big Three, the most powerful of the gods, makes him an even bigger target to their enemies (adding to the fact that he's a forbidden child, so he's also not safe from Zeus and Hades' wrath either).
Broken Pedestal: He loses a lot of respect for Luke when he learns he is the Lightning Thief and framed him.
David Versus Goliath: Basically, his fight against Ares has all the hallmark of this archetype: an incredibly powerful, looming of an inhuman powerhouse against a much smaller and seemingly weaker opponent whose only advantage is his quick wits and the skills the picked up. And thanks to the fact that the duel ended being Victory by First Blood, Percy (the David) actually manages to defeat Ares (the Goliath) in combat.
Deadpan Snarker: He wouldn't be Percy Jackson without his snarky moments.
Determinator: Even if the appointed time for finding the Master Bolt has already come and gone, Percy is determined to see the quest through despite being too late to stop the war.
Didn't Think This Through:
- He brushes off Annabeth's concerns about the impertinence of sending Medusa's head to Olympus, thus ticking off the gods.
- In "The Prophecy Comes True", even after returning Zeus's Master Bolt and getting said god's permission to return after revealing Kronos's involvement, Percy eggs on Zeus on how his family only obeys him out of fear rather than love or respect. Upon which Zeus decides to kill him via the Master Bolt, and it's only thanks to Poseidon's near-literal last second save that Percy isn't reduced to a pile of ash.
Dream Spying: Percy discovers he has this ability in "We Take a Zebra to Vegas". While recurring dreams is common for demigods, Annabeth's comments imply that Percy being able to eavesdrop on immortal deities is actually pretty rare and likely unheard of.
Friendless Background: Never had actual friends when he was young, until he met Grover, who became his first genuine friend.
Genre Savvy: When confronting his murderous half-brother, Procrustes, Percy knows his waterbeds are traps he uses to kill his "customers" as he's heard of his stories before.
Hair of Gold, Heart of Gold: A genuinely nice kid, if a bit snarky, and blond-haired.
Heal It with Water: Being knocked into water heals all his wounds, due to being a descendant of Poseidon.
Heroes Prefer Swords: During Capture the Flag, he discovers his natural talent with a sword, being able to hold off three Ares kids with little difficulty, only getting himself cut three times. He even manages to hold his own against Ares, the War God, and Luke, who's a Master Swordsman. However, it's clear Luke was somewhat toying with Percy since he was the one who taught him how to sword-fight.
Heroic Sacrifice: Briefly traps himself in Hephaestus' machine so Annabeth can claim Ares' shield. Thankfully, Hephaestus sets Percy free after Annabeth calls him and the gods out for their wrath towards the mortals and demigods.
How Do I Shot Web?: He admits he's still getting used to his powers and doesn't completely understand them yet.
Ironic Fear: Was initially afraid to swim when he was younger, despite being a child of Poseidon, and Sally had tried to help him get over it. When under the Mississippi River, Percy panics as he tries swim to the surface for air, but his foot is trapped. It takes encouragement from a Nereid sent by his father to help him overcome his fears and embrace his water powers.
Making a Splash: As the son of Poseidon, Percy possesses hydrokinetic powers.
Momma's Boy: A healthy example, just like the books. Percy is very close to his mortal mother and is incredibly torn up after losing her to the Minotaur. The only reason he agrees to go on his quest is to free his mother from Hades' hold. He even prays to her on his first night at camp, and trusts Medusa because his mom told him a version of her story that was sympathetic towards Medusa. When Ares disrespects his mother right in front of him, the son of Poseidon promptly responds by summoning a tidal wave.
Mythology Gag: In Episode 2, Annabeth nicknames him "Sunshine", which is ironic due the show's version of Percy bearing the spitting image of Will Solace.
New Kid Stigma: Percy ends up on both the forgiving and unforgiving ends of this trope during his first days at Camp Half-Blood.
Refusal of the Call: After being claimed by Poseidon, Percy flat out refuses to help his father find Zeus' stolen Master Bolt in the Underworld. He only agrees when Grover informs him that his mother is still alive and was actually kidnapped by Hades.
Shut Up, Hannibal!: Pulls off an epic one liner on Ares at the end of "A God Buys Us Cheeseburgers":
Percy: We're not gonna fail, and I'm getting pretty tired of you saying it. You think you know who I am, but you don't. And if you aren't careful... you're gonna find out.
Super Not-Drowning Skills: Being the son of Poseidon, he discovers that he can breathe underwater.
Turn the Other Cheek: While he was understandably peeved at Grover for getting him kicked out of Yancy, he quickly forgives him the moment he tells him that Sally is still alive and he has a chance to save her and find the Master Bolt.
Undying Loyalty: To his friends and family. When Annabeth volunteers to take a Last Stand with the Chimera, Percy, despite being poisoned, is quick switches places with her, being willing to sacrifice himself to protect his friends. Later on, while retrieving Ares' shield, he volunteers to trap himself in Hephaestus' machine so Annabeth can claim it.
Unskilled, but Strong: Despite not having formal training, Percy was able to hold his own against the Minotaur with nothing but his wits and sword. He even fought against three of Ares' kids without being empowered by the water. He's even strong enough to fight against Ares himself and win. However, when confronting Luke, it's clear he's still way out of his league as Luke was toying with him and he would've killed Percy had Annabeth not intervened.
Upbringing Makes the Hero: Being raised by Sally and being kept separate from the mythological world for as long as he was essentially made him a lot more empathic and compassionate than a lot of the Greek gods and past demigods. While this aspect was heavily implied in the books^note, this series makes it outright explicit that this is the main reason he's an All-Loving Hero.

Annabeth Chase

https://static.tvtropes.org/pmwiki/pub/images/pjo23_annabeth.png

"You still don't get where you fit in to all of this, do you?"

Played by: Leah Sava Jeffries

Demigod daughter of Athena and head counselor of the Athena Cabin. She has lived at Camp Half-Blood for five years and is regarded as one of its strongest warriors and most brilliant students.

Actually Pretty Funny: Despite trying to remain serious, Annabeth is clearly amused by Percy's fake British accent when pretending to be her mother in episode 4.
Adaptation Dye-Job: In the books, it was Percy who was the black-haired one while Annabeth was the smart blonde. Here, their hair colors are switched. In addition, her eyes are brown like an owl's instead of grey.
Adaptational Jerkass: Downplayed, but Annabeth is far more open about her irritation with Percy's naïveté at the beginning of their quest in the series than she ever was in the book.
Artificial Human: Annabeth, and all children of Athena, are divine thoughts made manifest and gifted to their mortal parent.
Badass Normal: In contrast to other demigods, children of Athena don't have any powers conferred onto them from their divine parent, so all Annabeth has going for her are years of training, her own wits, and a celestial bronze knife.
Big Damn Heroes: After learning of Luke's Face–Heel Turn, she saves Percy when he tries to land a killing blow.
Brainy Brunette: Has black hair and inherits her mother's wisdom.
Broken Pedestal:
- When Annabeth discovers that Athena had intentionally allowed Echidna and Chimera to enter the Arch, knowing her daughter was there.
- She eventually feels the same way when she figures out that Luke is the Lightning Thief and witnessed him trying to kill Percy in cold blood.
Brutal Honesty: When Percy asks if she's been stalking him, she just says, "Yes." When she reveals herself after Percy beats Clarisse and her goons, he asks her if she was just standing there watching him the whole time, she admits to that, too.
Dark and Troubled Past: Luke explains that he found a young Annabeth five years ago all alone and then lost her best friend, Thalia, on the way to camp.
Defrosting Ice Queen: Annabeth starts off quite stand-offish and cold towards Percy, to the point that he doubted that they would become friends. However, as they become closer on their quest, it's clear that she is slowly letting her guard down around him.
Jerk with a Heart of Gold: Annabeth initially comes off as rather cold, calculating, enigmatic, and brutally honest towards Percy, from using him as a pawn to distract Clarisse during Capture the Flag to bluntly admitting to have been stalking him ever since he arrived at camp. Luke, having known her the longest, explains to Percy that she has a good heart deep down; she's just always trying to stay six steps ahead of everyone and wants to find the demigod Chiron had promised her she'd accompany on a quest to prove herself to the others. She admits that she had to earn Thalia's friendship, which is implied to be why she initially acts distant around Percy.
Jumped at the Call: She's gotten all the glory she can at camp and is eager for her first quest. Ever since Chiron had promised her that she'll join three on an inevitable quest, she's made a habit out of stalking new arrivals to camp to see if they're the one she's waiting for. She eventually finds that demigod in the form of Percy Jackson, a forbidden son of Poseidon.
Like Brother and Sister: Luke affirms he sees Annabeth as a little sister. Though it's currently unclear how she herself feels about Luke, they still hold a lot of respect for one another. Annabeth even admits that Luke had accepted her without question, unlike Thaila, whom she had to earn with time.
Race Lift: Annabeth is black instead of white like in the books or the previous adaptations.
Signature Headgear: Athena gave her a New York Yankees hat that allows her to turn invisible when she puts it on.
Twofer Token Minority: She's Black and like Percy, has both ADHD and dyslexia, qualifying her as disabled.
Young and in Charge: She's the same age as Percy, but she's head of her cabin and Luke defers to her in Capture the Flag. With good reason, as she's a strategic genius who has also lived at camp for five years.

Grover Underwood

https://static.tvtropes.org/pmwiki/pub/images/pjo23_grover.png

Played by: Aryan Simhadri

A fellow satyr who resides in Camp Half-Blood. He is charged with protecting his best friend, Percy Jackson.

Adaptational Angst Upgrade: Unlike the books and the film, Grover is much more torn up when he discovers his Uncle Ferdinand's statue in Medusa's lair, explaining to the others that he was on a quest^notefor Pan and yet, unlike Medusa's other victims, Ferdinand doesn't look terrified.
Adaptational Attractiveness: Unlike his book counterpart, this Grover is clean-shaven, lacks acne, and is generally more convincing as a sixth-grader. It helps that Aryan Simhadri was 16 during filming.
Adaptational Badass: In the book, Grover's absolute loyalty and friendship with Percy is utterly uncontested and impossible to deny, but he was a Cowardly Lion who tended to be the most deferential of those in power (such as the gods) out of the trio. This Grover is a lot more self-assured and has very little problem in talking back against the gods if it helps Percy. We get to see this with these examples:
- In the books, Grover acts cowardly towards Mr. D and follows his orders without question. Here, he bravely goes against Mr. D's orders about not telling Percy that his mother is still alive, even while the God of Wine himself was giving the satyr a Death Glare.
- In the books, he was easily the most unnerved towards Ares when they met him. But as "A God Buys Us Cheeseburgers" shows us, Grover not only fearlessly agrees to be Ares' "collateral" so Percy and Annabeth will retrieve his shield, he masterfully uses that time to flex his very impressive interrogation skill between buttering up Ares in order to gain information from the War God.
- During the trio's audience with Hades in the books, he almost gets dragged down in Tartarus by the winged shoes, which leaves him utterly shaken and he's the one who speaks to Hades the least. Here, he point blank (if utterly erroneously) accuses Hades of stealing the Master Bolt out of jealousy when he rhetorically asks why he would want the Master Bolt.
Adaptation Dye-Job: Like Brandon T. Jackson before him, Grover has black hair instead of brown. He still carries over his brown eyes from the books, though.
Adaptational Modesty: Illustrations have depicted Grover being pantsless in his satyr form, only wearing them when in his human disguise. But here, he wears pants, or shorts in this case, both in and out of his human disguise.
Age Lift: At the start of the books, Chiron estimates him to be about 28. In the series, he explicitly states in the pilot episode that he's 24.
Guile Hero: In "A God Buys Us Cheeseburgers", Grover very impressively manages to butter up and actually built a rapport with Ares that allows him to pass the time without any problem and any kind of danger.
Hidden Depths:
- As shown in "A God Buys Us Cheeseburgers", Grover is surprisingly good at playing detective, using his Guile Hero antics to manipulate Ares into confessing that he knows more than he's letting on. Since Ares knows Percy isn't the thief because both he and Grover are well aware that the son of Poseidon wasn't on Olympus during the Winter Solstice, which is when the Bolt was stolen. But Zeus had likely ordered the god of war to retrieve his Bolt from Percy, but Ares didn't because he likely knows who the real Lightning Thief is.
- He might have been buttering up Ares, but as a satyr, he's well aware and fully accepts that Nature Is Not Nice. He goes as far as to quote Alfred, Lord Tennyson's "red in tooth and claw."
Laser-Guided Amnesia: Briefly went through this during his time in the Lotus Casino. He gets better once he leaves.
My Greatest Failure: Before he met Percy, he was Thalia, Luke, and Annabeth's protector. While he did led Annabeth and Luke to camp safely, he failed to save Thalia and even after five years, he still blames himself.
Older Than They Look: He's actually 24, but since satyrs mature half the rate as humans, he physically looks like a 12-year-old. It's implied that Grover is still considered an adolescent by satyr standards.
Race Lift: White in the books, Indian in the Disney+ series.
Screw the Rules, I'm Doing What's Right!: After learning from the Cloven Council that Sally Jackson may still be alive and held captive by Hades, Chiron and Mr. D strictly tell Grover not to say anything to Percy, believing it'd be too risky for his safety. Growing sick and tired of lying to his best friend, he bravely disregards their orders and tells Percy the truth about his mother, which was enough to motivate him to accept his quest.
Speaks Fluent Animal: Like all satyrs, Grover has the ability to talk to animals.
Undying Loyalty: To Percy. Even after getting him kicked out of school on purpose, Grover still travels to Montauk to warn him of the danger he is in, knowing how angry Percy is with him. Then, when Chiron and Mr. D order him not to tell Percy that Sally is still alive, he decides that he's done lying to his best friend and tells Percy the truth.

Camp Half-Blood

Staff

Mr. D

Dionysus

https://static.tvtropes.org/pmwiki/pub/images/pjo23_mrd.png

Played by: Jason Mantzoukas

A son of Zeus and god of wine, festivity, madness, and theater. Current director of Camp Half-Blood after he was punished by the King of the Gods for chasing after an off-limits nymph.

Adaptational Attractiveness: While he retains his black hair and purple eye color from the books, his body shape is the polar opposite of obesity, having been described in the books as resembling "a cherub gone to seed in a trailer park".
Adaptational Nice Guy: He's still as snarky and bored around demigods and especially rude around Percy, but shows shades of a Reasonable Authority Figure. Also, Mr. D never threatens to kill off Percy nor turn him into a dolphin when he's outed as Poseidon's forbidden child; he merely acts strict towards Percy when the latter refuses the quest and acknowledge himself as Poseidon's child. And with the world hanging in the balance, Percy — being "singular" amongst his kind — is the only demigod who's potentially powerful enough to put a stop to whatever sinister is at work.
Deadpan Snarker: Mr. D makes every opportunity he has to snark at people, even having some fun with Percy by lying to him that he's his godly parent. Chiron quickly arrives and assures Percy that Mr. D is not his father; he's just trolling him.
Loophole Abuse: Tried to pull this off by tricking Percy into believing he's his father to get him a bottle of wine. Chiron intervenes and explains that Zeus punished him from drinking alcohol. However, since demigods are not bound to the ancient laws that gods have to follow, Mr. D could take advantage of that. Percy is not amused.
Malicious Misnaming: Keeps calling Percy "Peter Johnson", and doesn't care when people correct him.
The Teetotaler: Not by choice. Zeus has forbidden Dionysus from drinking alcohol for a whole century, a very cruel fate for the god of wine.

Chiron

"When you're ready to hear what the gods have in store for you, they'll tell you."

Played by: Glynn Turman

Activities director of Camp Half-Blood and the immortal trainer of heroes. Goes under the alias "Mr. Brunner" while posing as Percy's Greek History teacher at Yancy.

Adaptational Job Change: In the novel, he posed as Percy's Latin teacher at Yancy. In the series, he posed as a Greek History teacher (according to a close-up of Percy's worksheet).
Adaptational Nice Guy: Downplayed. In the book, Chiron has always been a kindhearted and charming Cool Teacher, Team Dad and Big Good that all demigods can rely on, but a few of his interactions with Percy show that he can be Innocently Insensitive from time to time and his words had affected Percy negatively (not helped by the fact that when he has his confrontation with Percy, it's within earshot of Nancy, his bully). Here, he's a lot more gentle and encouraging during their conversation.
Big Good: Alongside Poseidon, Chiron is the Activities director and the "voice of reason" of Camp Half-Blood, providing much needed moral support and leadership to demigods in need.
Cryptically Unhelpful Answer: As he's been sworn to silence on certain important details, his response to Percy's questions is to dodge them with cryptic advice about how gods work on their own time or about how secrets will be revealed when the time is right. As soon as Poseidon claims him, he drops this and tells Percy everything.
Disabled in the Adaptation: In the Disney+ series, his left back leg has a brace on it. The creators have explained that this is a war injury, specifically from being injured by Heracles' poisoned arrow, though it will simply be a detail during Season 1.
Our Centaurs Are Different: Chrion is very much a classical centaur — human from the waist up, body of a horse from the waist down. He can pass as human due to the use of his magical wheelchair.
Race Lift: Official art connected to the books depicts him as being Caucasian with brown hair. Here, he's played by an African-American actor.
So Proud of You: Makes it abundantly and explicitly clear to Percy that after everything he accomplished and how much he has grown he's nothing but utterly proud of the younger boy and it's quite clear that Percy is incredibly touched by Chiron's pride in him.
Spared by the Adaptation: In the versions of the myths where Chiron is wounded by Heracles' arrow, the agony from the hydra venom is so intense that he relinquishes his immortality to end his pain. While the books simply followed the version of events where he survived and remained immortal, Word of God has confirmed this incident happened in the show's canon, and that Chiron still suffers the pain of the injury, but he's still alive and presumably immortal in the present day. invoked

Oracle

The Oracle of Delphi

Played by: Jennifer Shirley

A cursed mummy whose job is to reveal prophecies to demigods tasked with a quest.

The Voiceless: She doesn't speak when Percy goes to talk to her, instead she communicates via green mist that takes the form of Percy's step-dad, Gabe.

Campers

Luke Castellan

https://static.tvtropes.org/pmwiki/pub/images/pjo23_luke.png

"Spend too much time trying to figure out why the gods do whatever it is they do, you'll drive yourself crazy."

Played by: Charlie Bushnell

Demigod son of Hermes and head counselor of the Hermes Cabin. He's regarded as the best swordsman in camp, as well as a surrogate brother to Annabeth. However, he's later revealed to be in league with the evil Titan Lord, Kronos, in their mission to destroy the gods.

Adaptational Dye-Job: In the books, it was Luke who was the blond one while Percy had the raven hair. Here, their hair colors are switched.
Adaptational Nice Guy: Played with. Luke's betrayal of Percy after the younger demigod realizes that he's the Lightning Thief is portrayed being a lot less cold and malicious that in the book, despite Luke is being utterly firm in his decision and unwavering to side with Kronos against the gods. Luke is legitimately troubled that Percy got caught in the crossfire of his plan, and clearly does not want to personally hurt him more than he has to and seems a lot more genuine in trying to recruit Percy to his side than in the books. That doesn't excuse the fact that he was willing to endanger and frame Percy for his crimes in the first place, and was very close to killing the son of Poseidon had Annabeth not intervened.
Berserk Button: The moment Percy mentions that he met his father, Hermes, Luke loses it and tries to kill him.
Big Brother Mentor: Takes up this role for Percy, helping him explore the camp's activities to find out where his talents lie and who his godly father is. He's also this to Annabeth, having raised her for five years. Sadly, that quickly goes downhill when Percy and Annabeth learn that Luke is working for Kronos.
Can't Kill You, Still Need You: Zig-zagged. Luke genuinely tried to kill Percy when he refused to join him and Kronos, and only left him alive because Annabeth intervened. Percy believes Luke doesn't actually want to kill him, a statement which deeply worries Chiron. The only reason Luke would truly want the son of Poseidon alive is because he believes he could be a powerful asset to Kronos, if only he could tempt him.
Dark and Troubled Past: Before camp, Luke lived on the streets alongside his best friend, Thalia, and the two took a young Annabeth in. On their way to camp, Thalia lost her life to protect him and Annabeth. Annabeth later reveals in "We Take a Zebra to Vegas" that his mother was a Seer, a mortal who can see through the Mist, yet her gift had apparently driven her insane through unknown means. She's also aware that Luke's very bitter when his father's brought up, as she quickly hangs up on Luke when Percy begins to ask him about Hermes.
Distinguishing Mark: He has a gnarly scar running down the right side of his face, starting from his eye.
Face–Heel Turn: He's the Lightning Thief, the demigod complicit in siding with Kronos in order to facilitate a war between Zeus and Poseidon and create chaos in Olympus. He follows up his betrayal by at first trying to recruit Percy to his side, then outright trying to kill him before fleeing camp.
Hypocrite: Luke claims to Percy that he never meant to betray him nor hurt him... and yet shamelessly gave him the cursed flying shoes meant to pull the son of Poseidon into Tartarus which would've killed him anyway (and he didn't seem too bothered about Grover, his former protector almost being pulled instead).
Like Brother and Sister: Luke firmly establishes he sees Annabeth as a little sister after he and his late friend, Thalia, found her all alone in an alleyway and took her in.
Master Swordsman: Luke's regarded as the best swordsman at camp. His skills are shown during the Capture the Flag event when a red team member was forced into submission. When he fights Percy after the younger boy realizes that Luke's the Lighting Thief, he uses the fact that he was Percy's main sword instructor to his full advantage and effortlessly keeps up with Percy (who had actually managed to wound Ares) and would have killed Percy if not for Annabeth.
Oh, Crap!: Has a big one when Annabeth shows up to save Percy upon discovering his Face–Heel Turn.
Race Lift: In the books, Luke is (presumably) fully white. Charlie Bushnell has Irish heritage on his father's side, but is Costa Rican and Japanese on his mother's side, making him mixed-race of white, Latino, and Asian.
Screw This, I'm Outta Here: Just as he was about to kill Percy, Annabeth intervenes after hearing everything. Luke, horrified and knowing fully well what Annabeth is capable of in combat, quickly escapes via his portal.
Villain Respect: While sparring with Percy when his betrayal is brought to light, the experienced Luke is clearly toying with Percy, but still recognizes the latter's confidence and improvement with his sword.
Luke: [to Percy] You did get better.

Clarisse La Rue

https://static.tvtropes.org/pmwiki/pub/images/pjo23_clarisse.png

"Glory's fine... revenge is more fun."

Played by: Dior Goodjohn

Demigod daughter of Ares and head counselor of the Ares Cabin. She is a bully who likes to pick on new campers who stand out.

Adaptational Attractiveness: Percy doesn't describe her as particularly attractive in the books, while the graphic novel depicts her as something of a Brawn Hilda. Here, she is much easier on the eyes, just like Leven Rambin before her. She still retains her brown hair and eye color, though.
Alpha Bitch: The resident popular girl at Camp Half-Blood who constantly bullies Percy and other campers over their newcomer status. It also helps that, unlike her book counterpart, she is beautiful and thin.
Beauty Is Bad: Clarisse is very pretty. However, she still tries to maim Percy as revenge for him stopping her from bullying him.
Barbaric Bully: She's this to Percy because she thinks he's lying about single-handedly slaying the Minotaur, attempting to give him a swirly alongside three of her half-siblings, and then deliberately trying to beat him up during Capture the Flag.
Big "NO!": Clarisse shouts one after Percy uses his agility to snap her electric spear in half. For those who have not read the books, it was given to her by Ares himself.
Death Glare: She and her cabinmates are the only ones who don't applaud for Percy when he returns to camp, instead glaring daggers at him after learning that he humiliated their father, Ares.
Mugging the Monster: She tries to bully Percy, who's smaller and weaker than her and has no combat training. Unfortunately for her, what he does have is control over water, incredible natural talent (especially with a sword), and quick wits, so she and her cronies get trounced both times.
Race Lift: Another character who is presumably white in the books, but is portrayed by a mixed-race actress who has a white mother and a black father.
Red Herring: The trio believed Clarisse is the Lightning Thief after Grover obtained information from her father, Ares, and ask Luke to report her... Except Luke didn't turn her in because he's the real Lightning Thief.
Revenge Before Reason: She chooses to go after Percy instead of focusing on the Capture the Flag Game. She outright states that revenge for the bathroom incident will be "more fun" than the glory of winning the game. In the end, however, she gets neither and even ends up losing her prized electric spear.

Chris Rodriguez

Played by: Andrew Alvarez

Demigod son of Hermes and Luke's half-brother/second-in-command.

Adaptational Early Appearance: In the books, Chris was mentioned briefly in The Sea of Monsters but didn't truly appear until The Battle of the Labyrinth. In the series, he's introduced in the second episode as Luke's cabinmate who accompanies him and Percy in finding something Percy's good at.
Ascended Extra: Unlike the first books, Chris gets more prominent screen time and dialogue alongside Luke.
Deadpan Snarker: Shows shades of this when rhetorically answering Percy's snark if there's a god of disappointment.

Other Half-Bloods

Thalia Grace

Demigod daughter of Zeus and the first forbidden child of the Big Three to be born after the Pact. She was Luke and Annabeth's best friend but lost her life protecting them from Hades' Furies.

Action Girl: Annabeth described Thalia as tough and that she didn't care she was a forbidden child. She even gave her life fighting off Alecto and her sisters to protect her friends.
Defrosting Ice Queen: Annabeth admits she had to go through this with Thalia to earn her friendship.
Heroic Sacrifice: She died protecting Luke and Annabeth to ensure they make it to Camp Half-Blood safely.
Posthumous Character: Like the book, she had died five years before the events of the series.
Transflormation: Technically speaking, Thalia isn't dead, though her human life is over. To prevent his dying daughter from facing his angry brother in the Underworld, Zeus turned Thalia into a pine tree on Half-Blood Hill. Annabeth regularly visits the tree to feel some connection to her fallen friend.

Monsters

Alecto

"It was only a matter of time before we found you."

Played by: Megan Mullally

One of the three Furies, the three chief servants of Hades, and the head torturers in the Underworld's ranks. Goes under the alias "Mrs. Dodds" while posing as Percy's pre-algebra teacher in Yancy Academy.

Adaptational Attractiveness: Alecto's Fury form retains Megan Mullally's regular face, making her far easier on the eyes than her more traditionally grey visage, complete with Scary Teeth.
Adaptational Badass: Unlike the book, Grover had no idea Mrs. Dodds was a Fury as the Mist had kept her identity well-hidden, even from him and Chiron.
Adaptational Nice Girl: While Alecto is still an enemy of Percy's like in the book, she only pursues him due to following Hades' orders, and is far less malicious while trying to kill him. In fact, once Percy gets the Helm of Darkness from Ares and gives it to Alecto to return to her boss, she even wishes him luck with traveling to Olympus, something her book counterpart would have never done.
Adaptational Wimp: Her first fight with Percy was shorter in the show, as she was stabbed with Riptide almost as soon as she had Percy knocked to the ground.
The Dragon: While Hades is very much not a bad guy, as his main agent who works under his orders she falls into this classification, especially due to the fact that with the reveal of Hades' true personality she comes off as his More Despicable Minion despite arguing that she's Just Following Orders.
Just Following Orders: She's extremely loyal to Hades to the point that she never questions what her master really wants with Percy Jackson and just follows his every command to the letter.
Know When to Fold 'Em: She quickly gives up when confronted by Medusa, simply deciding to wait outside until the heroes are outside of her protection.
Oh, Crap!: She immediately panics when she realizes that she is in Medusa's territory and shields her eyes with her wings.
Pet the Dog: In episode 8, after Percy gives her Hades' Helm, she wishes Percy good luck on Olympus and ease his worries by implying that Hades will honor their deal and return Sally.
Poor Communication Kills: Had she revealed why Hades was after his nephew thus revealing the larger conspiracy at work, Alecto may not have been killed twice before completing her mission in getting the Helm back.
Taken for Granite: Percy uses Medusa's head to turn her to stone in Episode 3, keeping her from pursuing the trio for a while. She gets better by the season finale.
Telepathy: She to Percy via mind messaging after witnessing him use his powers on Nancy and reveals her true Fury form to him.

Minotaur

The infamous half-man, half-bull monster from Greek mythology. He is the first monster Percy fought.

Hoist by His Own Petard: Dies after getting stabbed by Percy with its own severed horn.
Impaled with Extreme Prejudice: Is defeated this way after Percy stabs it in the head with its horn, disintegrating it.
Naked People Are Funny: PG-13 variation; the Minotaur is inexplicably wearing a set of underwear during his fight with Percy, which slightly detracts from his scare factor.
Sins of the Father: Given the throughline of the series that the gods are flawed parents, there's something to note in a monster Poseidon is responsible for creating that is threatening the lives of his lover and his child.
Starter Villain: The Minotaur is the first monster Percy actively fights and defeats after learning of his divine heritage.

Medusa

"We are not our parents, unless we choose to be."

Played by: Jessica Parker Kennedy

One of the three gorgon sisters who has the power to petrify any being with her gaze. Owner of "Aunty Em's Garden Gnome Emporium" and goes under the alias "Aunty Em".

Adaptational Attractiveness: Medusa is hardly the old and ugly crone Percy saw her as in the books. Here, she's younger, pretty, and dressed extremely glamorously.
Adaptational Consent: The lack of consent on Medusa's part in her relationship with Poseidon is at least alluded to in her telling of her story in the show, in contrast to the books where it was described in a more consensual manner.
Adaptational Sympathy: Medusa has been more fleshed out than in the books, which while not enough to make her heroic, is at least enough to have a sympathetic background that she's also a victim of the gods. She tells her story to the trio, namely that she was a devoted worshipper of Athena until she was seduced by Poseidon in the goddess's temple, an offense for which Medusa was punished instead of her divine victimizer.
Creepy Blue Eyes: She's shown to have these after removing her veil.
Dies Differently in Adaptation: She is beheaded after Annabeth sticks her cap of invisibility on her head, in order to keep the show PG-13.
The Dreaded: Alecto immediately freaks out and shields herself with her wings when she realizes she has entered Medusa's territory and sees her getting closer. Considering this is Medusa we are talking about, her reaction is fully understandable.
Faux Affably Evil: Stay on her good side and she is polite and helpful. Unfortunately, it is very easy to get on her bad side, as Percy learns.
Freudian Excuse Is No Excuse: For all of Medusa's justified anger towards Poseidon and Athena for the horrible things they did to her, she still turned hundreds of innocent people to stone and didn't hesitate in trying to kill the main trio the minute they refused her offer of help. This drives Percy to kill her in the end.
No Eye in Magic: She wears a veil so she can interact with people without turning them to stone. It is possible to see her eyes through the veil, but having something over them is apparently enough to disrupt the stone gaze.
Tragic Villain: Medusa's feelings of absolute betrayal towards Athena and Poseidon are explored a lot more deeply and sympathetically in this version and her sympathy towards Percy's situation in this quest comes off as far more genuine, even admitting that she sees Sally as something of a kindred spirit to herself due to attracting the attention of Poseidon, whom she calls "a monster". Basically, the series portrays her as a very embittered victim of the gods who rightly has negative opinions about them. None of this, however, changes the fact that she has turned to stone countless victims and was all for killing Percy, Annabeth and Grover in the end.
Villain Has a Point: Medusa is a monster in the literal and metaphoric sense, but she's right that the gods are fallible and have not adequately served their worshippers nor their demigod children, and most of time even punishing them for the most trivial of reasons. Medusa's words are proven true when Athena revokes sanctuary from one of her temples (the Gateway Arch) and had likely even sent Echidna to attack her daughter and her friends because Annabeth had committed an "act of impertinence", which was allowing Percy to mail Medusa's head to Olympus to "embarrass her".
Villainous Rescue: Outright intervenes in Alecto's chase of Percy, Annabeth and Grover on her territory and makes no bones about the fact that she's perfectly willing to take direct action against the Fury if need be.

Echidna

"You should run now."

Played by: Suzanne Cryer

Mother of all monsters, such as the Hydra, Cerberus, and the Chimera.

Adaptational Attractiveness: Echnida was described and previously depicted as an overweight hag. Here, her human form appears as a pretty middle-aged woman.
Faux Affably Evil: At first she presents herself as a kindly mortal woman to the main trio, before revealing herself for what she really is. It quickly becomes clear that she's there to deal with Percy, Annabeth and Grover and her gleeful delight at having the Chimera hunt them down is all stated with a disturbingly pleasant tone and volume, making her quite the Soft-Spoken Sadist.
Humanoid Abomination: Being that she quite literally gave birth to almost every monster in Greek mythology (except for some, like Medusa, who were cursed by the gods), she's one of these.
Humans Are the Real Monsters: She's of the opinion that the monsters she birthed exist to stand in the way of demigods, whom she says are the real monsters.
Hypocrite: Echidna believes that Humans Are the Real Monsters, especially demigods, because they're always causing trouble and spreading disaster everywhere. Yet she has no qualms spreading disaster herself and sending her children to cause trouble for heroes.
Menacing Stroll: Unlike the Minotaur or Alecto, Echidna never travels faster than a calm stroll when chasing Percy, Annabeth and Grover. All this does in the end is making her far more terrifying because she's clearly in no hurry to hunt them down and it makes it clear that she's greatly enjoying their fear as they try to escape her. She's taking her time to make her hunt something both her and the Chimera can enjoy.
Mind over Matter: With a simple gesture, she's able to tear a large hole in the Gateway Arch.
Mother of a Thousand Young: Being that she's the mother of all monsters, she's this by default.
Nice Job Fixing It, Villain: The blame could also be given to Athena for allowing it to happen, but it's Echidna letting Percy fall from the Arch that motivates Poseidon to save his son and teach him to embrace his divine abilities.
One Bad Mother: The Mother of All Monsters absolutely delights in helping her "children" hunt down demigods due to her Humans Are the Real Monsters mentality and treats their hunt as a twisted right of passage for all of her children. The sadistic delight she shows at Percy, Annabeth and Grover's fear of her and her "child" just makes her a more obvious example of this.
Perpetual Smiler: Throughout her whole conversation our heroes she has a wide toothy grin as she delights in thier horror and more than once said smile delves into the Slasher Smile territory.
Sadist: Judging by the wide grins she wears as she gleefully rhapsodies about how the Chimera is going to hunt down Percy, Annabeth and Grover and how they being afraid just makes the hunt more interesting, she's very clearly getting an emotional enjoyment out of this.
Telepathy: She uses this to tell Annabeth that her mother thinks she's impertinent.
Wake-Up Call Boss: A rare case of being a non Video Game version of this. The Minotaur, Alecto and Medusa were all incredibly dangerous enemies for Percy to face, but thanks to his inherent skillset, and Grover and Annabeth's help, he managed to one way or another take down all three beings. The Mother of Monsters, however, is on a completely different level and the fact that she has the Chimera helping her make the task all the more difficult to the point that the only thing Percy, Annabeth and Grover can do is basically run in order to escape her. Shortly after their encounter with Echidna, the trio would encounter Ares, almost be permanently trapped in the Lotus Casino, and would need to go to the Underworld. This narratively marks Echidna as the moment were the dangers drastically ramped up for our heroes, which makes it fitting she ended up being undefeated, unlike those that that came before her.

Chimera

Played by: Baby (as a Chihuahua)

A lion, goat, snake hybrid monster and daughter of Echidna who travels alongside her mother to try to kill the questing trio on their journey to find the Master Bolt.

Beware My Stinger Tail: Has a vaguely scorpion-like stinger at the tip of her tail which she uses to poison Percy.
Breath Weapon: Like in the source material and original myth, she can breathe fire.
Classical Chimera: In an overhaul from her appearance in the original books and myths, she heavily resembles a scaly green and gray skinned lioness with goat-like horns on her head, a cobra-like hood in the place of where a male lion's mane would be expected to be present, a vaguely crocodile or snake-like tail (with coral snake-like stripes) with a vaguely scorpion-like stinger at the tip, and the ability to breath fire.
Gender Flip: Male in the books, female in the Disney+ series. Her head is even that of a lioness, rather than the maned head of a male lion in the books and original myths. Then again, this is more faithful to how it was depicted in Greek myth, 'Chimera' being Greek for "she-goat".
Mister Muffykins: To regular humans, she appears as a fluffy puppy owned by a woman who's slightly too nosy.
Mix-and-Match Critters: As is traditional for most mythically inspired chimeras, she has a mixture of lion, goat, and snake traits. For a unique added bonus, she also has a vaguely scorpion-like stinger at the tip of her otherwise reptilian tail.
Panthera Awesome: Heavily resembles a lioness with some elements of goat, snake, and scorpion added in, and is a dangerous monster.
Playing with Fire: Breathes fire.

Procrustes

Played by: Julian Richings

Son of Poseidon and killer of travelers. He owns a waterbed shop called "Crusty's Waterbed Palace", where he also guards an entrance to the Underworld.

Adaptational Wimp: In the book, he manages to trick Grover and Annabeth into trapping them in his beds while Percy resorts to using his wits to kill him. Here, he's unable to trick the trio into laying on his waterbed traps as the kids are more Genre Savvy with his traps.
Cain and Abel: The first of his murderous half-siblings that Percy meets.
Daddy Issues: His dialogue with Percy suggests some issues living up to the expectations of being a child of a god.
Hoist by His Own Petard: Percy and Annabeth manage to trick him into being trapped by his own beds, though unlike the books they don't go so far as to kill him.
In-Series Nickname: Prefers to be called Crusty over his full name.
Serial Killer: As in the legends, he has a hobby of luring unsuspecting victims into laying in his booby trapped beds, upon which he kills them by dismemberment or stretching if they don't match its six foot length exactly.
Spared by the Adaptation: Unlike the book, Percy doesn't chop off Procrustes' head while saving his friends. The trio instead keep him encased in his own waterbed trap.
Threshold Guardian: His role is expanded from the books to make him also the overseer of a gateway to Hades. This morbidly ties into his hobby of serial killing, as one way or another visitors can get to Hades.

Cerberus

A giant three-headed Rottweiler that guards the gates of the Underworld.

Angry Guard Dog: At least at first. Eventually, he comes to see Annabeth not as an intruder, but as a playmate, but this introduces a new problem of a half-human preteen having to outrun a monster that doesn't realize she's alive and that he could easily hurt her.
Animalistic Abomination: A child of Echidna, Cerberus is a massive three-headed Rottweiler who keeps the living out of the Land of the Dead, and keeps the dead from leaving.
Big Friendly Dog: If you know the right tricks, he can be a delightful puppy who loves ear scritches and chasing after red rubber balls.
Canis Major: So big a human teenager can fit inside one of his mouths.
Extreme Omnivore: Attempts to eat Grover, a satyr, and swallows one of the key McGuffins no problem.
Hellhound: The Trope Maker in mythology.
Right-Hand Attack Dog: Charon, the boatman who ferries dead souls into the Underworld, keeps on him a dog whistle to summon Cerberus when living people find their way into the land of the dead. Either Cerberus will chase the living intruders back to where they came from, or he will kill them and then they can get in line with everyone else looking to cross the River Styx.

The Greek Gods

In General

A race of divine immortal beings who control the forces of nature and rule large portions of the Earth.

Alien Blood: As in the original Greek myths, the Olympians have golden blood, as seen on Ares when Percy manages to cut his leg during their duel.
Big, Screwed-Up Family: The Olympians are described as a family who will fight, betray, and backstab each other to get ahead. Ares lampshades this by telling Percy, Annabeth, and Grover the story of how the Olympians first came into power. Percy calls Zeus out for this in "The Prophecy Comes True" for failing to realize that the Olympians don't actually love him, as proven when Ares the War God had allied with Kronos into starting a war that would've put the entire world into jeopardy.
The Ghost: The gods are portrayed as a powerful and deadly ultimate force. Also, Zeus and Poseidon are noticeably absent from the picture until the final episodes.
Jerkass Gods: Even downplaying the worst portrayals, the series doesn't hide how terrible the gods are to everyone. It focuses on their backstabbing and petty nature along with their willingness to abuse their power to get back at each other. They treatment of their children ranges from neglect to using them as pawns to one-up each other. They aren't above turning on them for trivial reasons. Their treatment of other gods or mortals isn't any better.
Parental Neglect: The gods sire many children but are hardly ever part of the demigods' lives. Percy is very displeased with this, especially with his father Poseidon. Subverted for Poseidon, as he's been watching Percy from afar through the seas as he was growing up, since he really couldn't speak to his son directly.

The Big Three

Zeus

https://static.tvtropes.org/pmwiki/pub/images/lance_reddick_110393.jpg

"Thank you for the news. It is the only reason I'm letting you leave alive."

Played by: Lance Reddick (Season 1)

Lord of Mount Olympus and god of the sky, lightning, justice, and oaths. He is also Percy Jackson's antagonizing uncle as he blames the young demigod for stealing the symbol of his authority, the Master Bolt.

0% Approval Rating: As pointed out by Percy, no one likes Zeus and only obeys him out of fear, meaning they will turn on him the moment someone stronger or scarier like Kronos comes along. He does not take this well.
Adaptational Dye-Job: Zeus lacks his iconic long hair and beard from both mythology proper and the books, instead opting for a Bald of Authority and clean-shaven face. Of course, the gods do possess the ability to choose how they appear in the Riordanverse.
Adaptational Intelligence: In the books, Zeus is notorious for his Head-in-the-Sand Management, refusing to address the return of Kronos and forbidding discussion of the subject amongst his fellow gods until the evidence was too much to ignore. In this series, Zeus acknowledges the threat Kronos faces the minute he learns about it from Percy, and is quick to call for a council meeting to handle the "family business" it entails, albeit not without smugly declaring his victory against Poseidon beforehand.
Adaptational Nice Guy: Slightly. When Percy gives him his master bolt and informs him of the looming threat of Kronos, Zeus genuinely thanks his nephew for his actions, and even allows him to go free with his life without any restraints. In the book, Zeus is too prideful to do any of this, with his final words being a death threat to Percy if he ever attempts to fly in an airplane again.
Adaptational Villainy: Book Zeus is bad, but had the sense to call off the war once it was clear Poseidon and Percy were innocent. This Zeus insists on pursuing the war regardless, until Poseidon personally surrenders, and tries to kill Percy for calling him out on his crap, and decides to gloat about his "victory" afterwords all due to pride.
Badass in a Nice Suit: Wears a classy business suit as part of his default wardrobe, and is the king of all the Greek gods.
Cold Ham: In contrast to the Large Ham that is his literary counterpart, he conveys his trademark arrogance in a considerably more subdued yet no less dramatic manner.
Evil Is Petty: His conflict with Poseidon comes off as this. Even after Percy returns the Master Bolt, the war continues and Zeus would have killed Percy for his backtalk if not for Poseidon's intervention. Ultimately, the only punishment for "losing" the war Poseidon suffers is being forced to admit in front of all the other Olympians that he lost the war, giving the impression that Zeus is just trying to prove he's better than his brother.
Evil Uncle: Towards any of his brothers' "forbidden children" (minus his own descendants, like Thalia). Grover and Annabeth make it super clear to Percy that Zeus will be out for his blood because he's not supposed to be born. And if Percy were to travel by plane, he'd be in his uncle's domain, right where he can blast his nephew to bits.
Hypocrite: Zeus scowls at Poseidon for fathering Percy after they had sworn to a Pact. Poseidon counters that he had broken the Pact first when he fathered Thalia.
I Control My Minions Through...: Fear, a point made is the other gods and mortals obey him not out of any respect, but due to being afraid of what he will do to them. This bites him when it is made clear they will turn on him at the first opportunity, like Ares.
King Incognito: Zeus first appears as a man at the desk in the Empire State Building lobby. Percy doesn't realize who he is until he arrives on Olympus and sees the same guy.
Not So Stoic: When Poseidon offers his unconditional surrender to him, Zeus looks genuinely baffled that the God of the Sea is willing to do such a thing. And only a few seconds earlier, his Cold Ham persona briefly breaks when he finally has enough of Percy's "The Reason You Suck" Speech, and attempts to strike his nephew down with murderous intent.
Perpetual Frowner: There's no facial expression Zeus wears other than a stern glare. Given his sole interactions so far have been with Percy and Poseidon, it only makes sense.
Pet the Dog: While Zeus is an arrogant and selfish ruler, he does show some kindness on occasion.
- As Thalia was dying after helping Grover, Luke and Annabeth escape to Camp Half-Blood, Zeus took pity on his daughter and transformed her into the tree that guards the border of the camp.
- Though he makes no secret of how much he despises Percy, Zeus has just enough gratefulness for getting his Master Bolt back and hearing the news of Kronos's return to allow to his nephew to leave Mount Olympus with his life, despite Annabeth's belief to the contrary. It's only when Percy starts pushing his buttons does Zeus attempt to obliterate him where he stands.
Race Lift: Unlike his older brothers and his book counterpart, Zeus takes on the appearance of a black man in the first season.
Scary Black Man: Zeus is played by the African-American Lance Reddick in this show, and is a vengeful, angry god who few people want to mess with.
Tranquil Fury: He only raises his voice once, when cuts Percy off, but his expression, tone of voice, and the thunder crashing behind him make it very clear how furious he is at Percy's existence. Once Percy starts running his mouth, he stops talking and tries to kill him.
Would Hurt a Child: When Percy warns Zeus of Kronos' return, he coldly dismisses him, much to his nephew's annoyance. Percy digs into his skin further, leading Zeus to try to strike him with his reunited Master Bolt before Poseidon intervenes.

Poseidon

"One day... one day, when he's ready. When he knows who he is... and where he belongs. And fate has revealed to him his true path. On that day... I'll be right by his side."

Played by: Toby Stephens

King of Atlantis and god of the sea, oceans, storms, earthquakes and horses. He is also Percy Jackson's benevolent father who asks for his help in stopping a war between him and his brother before it begins.

Adaptational Early Appearance: Downplayed as it's via a flashback and within the same book/season, but Poseidon doesn't appear in person until Chapter 21 of The Lightning Thief, whereas here he shows up in Episode 7 of Season 1; corresponding to Chapters 17 to 19 of said book.
Adaptational Dye-Job: Due to the production team choosing to keep Walker Scobell's blonde hair intact, Poseidon's hair is blond, but in a muddy shade.
Adaptational Nice Guy: Downplayed. Both the book and show versions of Poseidon genuinely love Percy, but this Poseidon is more active in helping Percy with his quest. In the books, he didn't help until Percy prayed to him; and his help was softening Percy's fall into the river. He also only gives Percy three pearls for his trip to the Underworld despite knowing about Percy's desire to save his mother. In the show, he helps Percy unprompted by sending a waterspout to grab Percy as he's falling and pull him into the river, and gives him four pearls, with the extra pearl being intended for Sally.
Big Damn Heroes: Poseidon summons a giant waterspout to save Percy when he falls from the Gateway Arch. He also stops Zeus from blowing his son to bits when he argues about Kronos' return.
Big Good: Alongside Chiron, Poseidon asks for help from his demigod son, Percy to stop the upcoming war between him and his brother, Zeus before it even begins and save his mother in the process.
Commonality Connection: Has an implied one with Hermes, as they both greatly dislike the fact that they are Powerful and Helpless when it comes to protecting and helping their children. As Hermes tells Percy and Annabeth, the hardest thing about being a parent is having to sit back and let your child risk being hurt so they can learn to overcome obstacles on their own and not being able to do anything for them despite being powerful gods. Hermes outright tells Percy that Poseidon himself commiserated with Hermes in his frustration, but told him the only thing they could do to stand back and watch their children as much as they could even when they were in dangerous situation even if they really didn't like the situation.
Good Parents: Much like Sally, Poseidon shows how much his son's life means to him, by saving him from his fall from the Arch, and then summoning a water spirit to help Percy learn of his abilities. The water spirit even reveals that the God of the Sea has always watched over Percy, contrasting to how he initially believed his father ignored him his entire life. He also "surrenders" his war with Zeus to spare Percy's life and allow his arrogant brother to gloat about his "victory".
Lord of the Ocean: He's god of the sea and oceans with abilities to match said title as seen when he summons a giant waterspout to save Percy when he falls from the Gateway Arch.
Papa Wolf: Percy has feared that his father wouldn't protect him after ignoring him his entire life. Then, in Episode 4, when Percy falls from the Gateway Arch after Athena allows Echidna to do so, Poseidon sends the giant waterspout to save his son. When he notices that Percy is still in distress, he quickly sends a water spirit (a Nereid) to help him to embrace his powers. When the deadline unfortunately elapses, due to Percy's stay in the Lotus Casino, he sends the same nereid with his message to Percy to return to camp for his own safety (which Percy refuses).
- This even continues to the finale, where Poseidon defends Percy from Zeus himself! He even goes so far as to surrender the war and deal with his brother gloating about the victory if it meant keeping Percy safe from his much crueler uncle.
So Proud of You: Even if Poseidon himself could not meet Percy in Santa Monica due to the fact that the deadline for the quest to find the Master Bolt has unfortunately passed and he's currently preparing for war, the very first message he has the Nereid relay to Percy once the boy arrive in Santa Monica is that nothing about the situation was Percy's fault, that Percy is brave, strong and made Poseidon proud.
You Are Better Than You Think You Are: In the Flashback B-Plot of "We Find Out the Truth, Sort Of", we learn that Sally contacted Poseidon once during Percy's childhood, knowing that she'd have no one else to talk to, and wants to tell him why she doesn't want to take Percy to Camp Half-Blood at an early age. Poseidon is nothing but utterly respectful, gentle and understanding towards Sally and in their conversation he makes it quite clear that the has the highest esteem for both her and Percy.
Sally: I want him to know who he is... before your family tries to tell him who they want him to be. He is better than that. He has better things in him than that.
Poseidon: Then I think you have your answer. He's going to go to school... and he is gonna learn things that you can't teach him there. And it's gonna be hard for the both of you. It's gonna be torture for the both of you... but he will be stronger for it on the other side. His mother raised him well.
Sally: ...Do you want to talk to him? I know you shouldn't, but... maybe just to hear your voice.
[Poseidon turns to a young Percy sitting alone at the table, unaware of his presence. A long pause, then thunder can be heard.]
Poseidon: One day... one day, when he's ready. When he knows who he is... and where he belongs. And fate has revealed to him his true path. On that day... I'll be right by his side.

Hades

https://static.tvtropes.org/pmwiki/pub/images/0x0_4.jpg

Played by: Jay Duplass

Ruler of the Underworld and god of the dead and riches. Percy Jackson's second uncle and main obstacle in his quest to get his mother back.

Adaptational Nice Guy: In the books, Hades is very cold, antisocial, and hostile, especially towards demigods that weren't his own children. In fact, Hades' first meeting with Percy in the books culminates in him threatening to murder his nephew and force his skeleton to lead his army into the battle that causes World War III. Here, while he did believe Percy stole his Helm of Darkness, he openly hears him out and is very willing to hand him back Sally Jackson in exchange for his Helm. And when Percy realizes that the true mastermind was, in fact, Kronos all along, Hades is unnerved by this news and wants Percy to hand him the Master Bolt to protect the Underworld and is willing to give Percy, Grover and Sally sanctuary for what is to come.
Black Sheep: Per the whole Everyone Hates Hades thing, Hades is something of an outcast from the rest of the Olympians and when he's accused of being responsible for the theft of the Master Bolt no one objects to the idea. Interestingly, he seems to enjoy this status, as it keeps him out of all the drama that comes with the rest of his Big, Screwed-Up Family, and he is perfectly content keeping to his domain and letting everyone else deal with their own business.
The Chessmaster: Despite being much friendlier than his book counterpart, Hades still retains his cunning. By rescuing Sally from being killed the Minotaur, he engineered a way to get Percy to come to the Underworld while giving him the perfect bargining chip to get what he wanted. The only problem was that Percy didn't have his Helm, but even then he's able to shift his plan to get Percy under his protection from his father, with the only option being for Percy to accept his hospitality at the cost of giving him the Master Bolt, which he only now wants for the coming battle with Kronos… which would have succeeded if not for Poseiden's pearls. What keeps him from being a Card-Carrying Villain is the fact that he's actually fairly reasonable, given the circumstances.
Dark Is Not Evil: The Lord of the Dead, as it turns out, is nowhere near as malicious as his reputation might have people believe. While some Adaptational Nice Guy elements is very much in play, Hades proves himself not only to be a perfect example of Reasonable Authority Figure (calmly hearing Percy out and being legitimately very willing to hand him back Sally Jackson in exchange for his Helm he believes Percy stole), but when Percy informs him that Kronos is returning and plotting against the gods, one of the first things he tells his nephew is "Ask me for sanctuary", making it very clear that he's perfectly willing to give Percy, Sally and Grover sanctuary for what he believes is to come.
Don't Fear the Reaper: Part comes from being an Adaptational Nice Guy compared to his more solemn and antisocial version the books, but this version of Hades is incredibly affable and down to earth in temperament, almost coming off as a calmer version of a Perky Goth. Yes, he might not be pleased that his Helm of Darkness has been stolen and believes that Percy might be responsible for that, but he's a Reasonable Authority Figure willing to hear people out and displays a genuine dry fondness for Percy even as he's mistakenly asking for the Helm that he erroneously believes Percy might have. He's far from the cold, foreboding and terrifying image one might have of someone who is The Lord of the Dead.
Everybody Hates Hades: When Zeus' Master Bolt is stolen, everyone immediately suspects Hades is the mastermind behind the theft to send Zeus and Poseidon to war. It turns that's not the case and he's never had any intention in messing with his brothers or destroy the world; it's Kronos.
Everyone Has Standards: Like the book, he never had any intention of overthrowing Zeus nor Poseidon; he's actually quite happy having his own living space in the Underworld, especially to stay away from all the Big, Screwed-Up Family drama above. And then Percy informs him that Kronos is plotting his revenge and turned Ares against the Olympians, and he's very unnerved by the very thought of his evil father returning.
Evil Uncle: Subverted, somewhat. It's implied he sent his Furies after his niece, Thalia, and they were the ones who killed her.^note In Percy's case, however, he sent Alecto and her sisters after his nephew because he believed he stole his Helm of Darkness. Despite that, he's shown a mutual decency towards his nephew, being willing to hear him out and is more than okay handing him back his mother if he returns his Helm.
Flat "What": After hearing Percy accuse him of working with Ares to steal the Master Bolt and incite a war between his brothers out of jealousy, his response is a confused "Huh?"
Good All Along: After being thought to be the main antagonist of the series behind the theft of Zeus' Master Bolt as everyone suspected, it eventually turns out that Kronos is behind the theft, using Ares for his purpose. Hades actually thought Percy stole his Helm; he has no interest in starting a war between his brothers.
I Gave My Word: He might not have the best relationship with his family, but Hades is a god of his word. It might have not be instantly, but Hades absolutely held his part of the deal to return Sally to Percy once his Helm of Darkness was returned to him.
Not So Above It All: While he isn't malicious and is far more reasonable than some of the other gods, his first reaction to hearing that Kronos is rising and trying to turn Zeus and Posideon against each other is to attempt to take the bolt for himself to defend his kingdom, rather than try to help Percy and Grover stop the coming war.
Oh, Crap!: Has a major one when Percy realizes that Kronos is returning.

Major Gods

Ares

https://static.tvtropes.org/pmwiki/pub/images/heyitsedge.png

"It's like people only see what they wanna see, and ignore anything at all that doesn't fit the story they like to tell themselves!"

Played by: Adam Copeland

God of war and violence. He is Clarisse's father from whom she's trying to gain attention through acts of glory.

Adaptation Dye-Job: He's still muscular and his eyes are still flame-colored as in the books, but his hair is a very dark brown instead of black.
Adaptational Mundanity: In the books, he had an obviously inhuman Red Right Hand in the form of his eyes being miniature nuclear explosions. Here, he has normal eyes.
Adaptational Nice Guy: Very downplayed. Ares is still a jerk in the show, but unlike his book self, he doesn't lay a curse on Percy after their battle, he simply warns Percy that he has earned a lifelong enemy and retreats. Riptide seems to be free from the "your weapon will fail you when you need it most" curse, at least for now.
Badass Biker: Like in the books, his preferred form is a grizzled man riding a black Harley-Davidson.
Big Eater: When Percy, Annabeth and Grover meet him in the diner, he has around a dozen burgers stacked in one plate and several orders of fries on the other.
Blood Knight: He's absolutely giddy at the idea of a war between Poseidon and Zeus due to the missing Master Bolt and as he talks about how much a Big, Screwed-Up Family the Olympians as a whole are (willing to backstab, betray and be cruel to each other so they can get their way) he sounds like a little kid in a candy store, utterly overjoyed with the fact. He even needs to hold back Tears of Joy at the idea of a fight between the Olympians. Being the War God among the Olympians means that all of this is his bread and butter. It also turns out that he is "the god who has turned" all along. He plotted with Kronos, not Hades, into starting a war amongst the gods.
Child Hater: Self-admitted. Even towards his own children, as he points out that he hates them less, not that he does not hate them at all.
David Versus Goliath: Basically, his fight against Percy has all the hallmark of this archetype: an incredibly powerful, looming of an inhuman powerhouse against a much smaller and seemingly weaker opponent whose only advantage is his quick wits and the skills the picked up. And thanks to the fact that the duel ended being Victory by First Blood, Percy (the David) actually manages to defeat Ares (the Goliath) in combat.
The Friend Nobody Likes: Even amongst the Olympian pantheon themselves, it's clear that Ares isn't particularly well-liked. Ares himself admits that he and Athena don't get along in the slightest, and Hephaestus creates a trap for him to spite him for stealing his wife Aphrodite away from him. Even Poseidon doesn't think too fondly of him, outright calling him a moron when Percy asks about him.
Face–Heel Turn: Granted, how much of a "Face" a bloodthirsty, warmongering War God can be a good question, but Ares used to nominally be on the side of the Olympians for millennia. Until its revealed in "We Find Out the Truth, Sort Of" that he, not Hades, was "the god who has turned" in Percy's prophecy all along, is in cahoots with Kronos, and complicit in the theft of the Master Bolt.
Hidden Depths:
- Despite being a virulent and bloodthirsty War God, he legitimately seems both impressed and touched that Grover recognizes his work on The Lobster War, Three Hundred and Thirty Five Years' War and The Turbot War. When Ares points out that hardly anyone died in those wars, Grover points out that's exactly why he likes them, saying "There is something cool about overwhelming force and a quick surrender", which actually seems to strike a chord with Ares.
- He's also aware that Athena acts like an Insufferable Genius all the time, an observation you wouldn't expect the typical meathead god of war to pick up on.
Mood-Swinger: Being the God of War and Violence means that his personality and mood tends to be pretty volatile and mercurial, to say the least. He can switch between being jovially Affably Evil to legitimately threatening while snarling that he has no trouble killing three children to pleasantly Affably Evil again within one whole conversation.
Saying Too Much: Ares confesses to Grover that he knows Percy is not the Lightning Thief and has nothing against Zeus. Grover bluntly points out that Zeus believes to the contrary, so Ares was likely ordered to retrieve the Bolt from Percy, yet he's known all along that the son of Poseidon never had it... so that means Ares must know who the real Lightning Thief is. Ares quickly clams up.
Sibling Rivalry: Judging by the fact that he's utterly vindicated when Grover makes a comment about Athena "always making things more complicated that they need to be so people will think she's smarter than you", it's made clear that he and Athena do not get along. It might also explain why he loses his cool with Annabeth a lot faster than with Percy or Grover.
Sore Loser: After losing the duel against Percy, Ares makes one final attempt to kill the main trio by briefly assuming his true form while teleporting away. Luckily for Percy, Annabeth, and Grover, they are Genre Savvy enough to catch on and cover their eyes in time to not be incinerated by looking directly at a god's true form.
Troll: Being a War God in modern times, he has found new and inventive ways to create conflict. He outright implies that he takes great delight in starting Flame Wars on the internet just because he can.
War God: The god of violent, bloody and brutal war and conflict among the Olympian Pantheon. And as such, conspires with his grandfather, Kronos, and the Lightning Thief into starting Zeus and Poseidon's war.

Hephaestus

Played by: Timothy Omundson

God of forges, fire, technology, craftsmen, sculptors, volcanoes, and blacksmiths.

Adaptational Attractiveness: Hephaestus is described as ugly and misshapen in both the myths and books. In the show, he's much more average and dorky-looking than hideously deformed like in the source materials.
Adaptational Early Appearance: His first proper appearance^note in the books is in The Battle of the Labyrinth (Book 4), yet here he appears in the first season (based on Book 1).
Adaptational Nice Guy: When he appears in the fourth novel, he's somewhat curt with Percy; in the show, he has the attitude of Being Evil Sucks with regards to how the gods carry out their wrath on mortals and demigods, and frees Percy from his trap and says he'll try to put in a good word with Athena for Annabeth's sake.
Being Evil Sucks: If his own backstory is anything to go by, he hates how the gods are just one Big, Screwed-Up Family willing to fight, betray, and backstab each other, and carry out their wrath on mortals and demigods.
Everyone Has Standards: Even he believes that Athena allowing Echidna into the Arch to hunt down Annabeth purely out of Disproportionate Retribution was pretty extreme, even for her.
I Just Want to Be Loved: It's implied he created the chair that trapped Hera in hopes that being given Aphrodite as a wife would mean her giving the love he was denied from his mother. Sadly, Aphrodite rejected him as well and had an affair with Ares.
Secret Test of Character: What he ultimately puts Percy and Annabeth through during their side quest into his Tunnel of Love. Percy volunteers to trap himself in Hephaestus' machine while Annabeth retrieves Ares' shield and continue the quest without him. Annabeth finally drops her guard and doesn't want to be like the gods anymore, because Percy is nothing like them. Hephaestus congratulates her, sets Percy free, and allows them to leave with the shield, no strings attached.
True Craftsman: The god of these, and one himself.

Hermes

Played by: Lin-Manuel Miranda

God of messages, travelers and thieves. He is also Luke's father.

Actually Pretty Funny: While delivering Medusa's head to Olympus after Percy sent it there in a show of impertinence, he cannot hold back his wide smirk and when he utters, "You guys are not going to believe this," he sounds more amused than anything else.
Adaptational Early Appearance: In the books, he makes his first proper appearance^note in Book 2. In the show, he is in the first season, based on Book 1.
Adaptational Wimp: Subverted. Annabeth, a 12-year-old with an invisibility hat, pickpockets the god of thieves to steal his car keys... but it turns out he knew what had happened, as he leaves a note for the "dumb kids" on his taxi.
Commonality Connection: Has an implied one with Poseidon, as they both greatly dislike the fact that they are Powerful and Helpless when it comes to protecting and helping their children. As Hermes tells Percy and Annabeth, the hardest thing about being a parent is having to sit back and let your child risk being hurt so they can learn to overcome obstacles on their own and not being able to do anything for them despite being powerful gods. Hermes outright tells Percy that Poseidon himself commiserated with Hermes in his frustration, but told him the only thing they could do to stand back and watch their children as much as they could even when they were in dangerous situation even if they really didn't like the situation.
Hyper-Awareness: As the god of thieves, there is very little that actually escapes his perception. He knows that both Percy and Annabeth are in the Lotus Casino in order to ask for his help to get into the Underworld, Annabeth seemingly pickpocketing the god of thieves to steal his car keys without being detected turn out to be a bust on her part because Hermes was well aware of the act and he seems to be fully aware how time passes outside the Lotus Casino, as he wryly hints to both Percy and Annabeth that their deadline is over. He all but states that the fact that he exist outside of space and time is why he's so aware of what happens around him.
Muggle–Mage Romance: Was in one with Luke's mother, who was capable of seeing through the Mist. Luke blames Hermes for his mother's current state... whatever that may be.
Mundane Utility: As he wryly points out, existing "outside of space and time" made him the perfect candidate for being the Messenger of the Gods.
Parents as People: Hermes seems to legitimately want to be a good parent towards Luke, but the fact that Luke viscerally blames Hermes for his mother's current condition and every time that they meet they always fight has made him both heartbrokenly morose and pretty cynical about finding ways to be a good parent. He truly sounds like he's holding back tears when mourning his situation and explaining to both Percy and Annabeth the fact that every time Luke and he meet up they just end up emotionally hurting each other and he very clearly does not want to hurt his son like that. It's almost tragic, how he wants to connect with Luke in a healthy, positive way, but their history and emotions between them stops them from connecting with each other in any meaningful way.
Race Lift: Hermes in the books was a god, so he could manifest theoretically as any race, but we only ever saw him take a Caucasian one. Lin-Manuel Miranda is mixed-race of primarily Puerto Rican descent.
Space Master: He describes himself as existing "outside of space and time", and has the ability to teleport.
Stepford Smiler: Turns out that there is a lot of emotional pain hiding behind that genial attitude and playful grin/smirk of his, being almost broken by the fact that he cannot be the father Luke deserves and being brought almost to tears as he recounts this.

Athena

Goddess of wisdom and battle strategy. She is Annabeth's mother who gifted her the invisibility hat.

Abusive Parent: It's eventually revealed in Episode 4 that she's not above endangering her own children if it meant setting an example to those she believes have wronged her, even removing sanctuary from her temples.
Adaptational Jerkass: In the books, Athena was a fairly affable goddess who genuinely cares for Annabeth and all her children, with her only unpleasant moments being when she threatened Percy if he were to harm his friendship with her daughter in any way, and when she was suffering from divine schizophrenia with her Roman counterpart Minerva. In the series, Athena is nowhere near as supportive, as she withdraws the protection of her temple out of spite towards Annabeth after Medusa's head is mailed to Olympus (even though it was Percy who actually did the deed), and is described by others as being much more prideful and egotistical.
Disproportionate Retribution: Intentionally allows Echidna and the Chimera into the Gateway Arch because her daughter, Annabeth, had "wounded her pride" by mailing Medusa's head to Olympus. Percy points out that it was all his idea and the box was under his name. Annabeth states that she knows that, but doesn't care because her daughter allowed it to happen and now she also wants her daughter to face the consequences.
Insufferable Genius: Grover and Ares both complain about how she over-complicates things just so she'll look like the smartest one in the room.
The Owl-Knowing One: Discussed; Ares claims she has a companion owl and thinks it's a dumb symbol for a goddess of wisdom.
Ares: She talks to it, like, all the time. This fat, nasty little feathered rodent. And it's like her best friend. And we're so sure that she's a genius and I, no owl, am not?
Race Lift: She hasn't been cast yet, but the Creative Closing Credits show Athena as having dark skin, like Annabeth. This also is due to Rick Riordan's preference of ability over appearance, as well as the justified fact that gods can shapeshift.

Mortals

Sally Jackson

https://static.tvtropes.org/pmwiki/pub/images/pjo23_sally.png

"Hold fast. Brave the storm."

Played by: Virginia Kull

Percy Jackson's beloved mother and ex-lover of Poseidon. A selfless, funny, kind and hardworking woman who is a staple in Percy's life. The young demigod's main goal of the quest, besides taking the Master Bolt to Olympus, is freeing his mother from the Underworld.

Adaptational Badass: In the books, she's a loving mother, but was fairly passive and endured Gabe's abuse. In the first episode, she fully displays Mama Bear traits, not letting Gabe put her down and even trying to side-swipe the Minotaur.
Empathic Environment: Many of Sally's scenes involve the rain, representing her connection to Poseidon as his ex-lover and mother of their son. In the first episode, she is introduced standing in the rain, and is "killed" by the Minotaur in the rain as well. In the episode 7 flashback, when she summons Poseidon, he sends a rainstorm to confirm that he received her offering. The final scene of Season 1 has her and Percy leaving their apartment as it's raining.
Good Parents: Sally doesn't question Percy's account of what happened when he's expelled from Yancy Academy as she hugged the boy the moment she saw him. They have an incredible bond to the point that Percy would go to the Underworld itself just to free his mother from Hades. Annabeth even realizes that the reason Sally kept Percy in the dark about the mythological world as long as she did was to keep him out of the Dysfunctional Family of the Gods and help her son become more empathetic and compassionate when he was ready to be in his father's world.
Heroic Sacrifice: She volunteers to stay behind and distract the Minotaur so Percy and Grover can safely get to the camp boundaries.
Mama Bear: Sally is fiercely protective of her son.
Struggling Single Mother: Much like the books. This is prominently fleshed out in flashbacks shown in Episode 7, where she's struggling to get Percy to school, with many reluctant to enroll him due to his poor track record. It was so bad that she had considered telling Percy the truth about his heritage, but she doesn't want to burden him with his father's Big, Screwed-Up Family. Poseidon encourages her to keep raising their son until he's strong enough to face his destiny.

Gabe Ugliano

Gabriel "Gabe" Ugliano

https://static.tvtropes.org/pmwiki/pub/images/gabe23.png

Played by: Timm Sharp

Sally's lowlife of a husband and Percy's obnoxious stepfather. He is unemployed and "earns" money through online gambling.

Adaptational Attractiveness: Gabe is hardly the fat walrus Percy described him to be in the book. He also has a full set of hair instead of being bald.
Adaptational Job Change: In the novel, he "managed" an appliance shop. In the series, Percy mentions Gabe is unemployed and plays online poker, and Sally's the one who pays the bills.
Adaptational Modesty: He's not seen with a "grief counselor" whom he's obviously cheating on Sally with during his interview.
Adaptational Nice Guy: Downplayed to make the show more appealing to younger audiences. He's still very much the same world-class Jerkass as in the books, especially towards Percy, but cuts the Jacksons some slack and allows them to take their yearly trip to Montauk. He's still shown to be emotionally abusive towards his stepson, though, and still brands him a fugitive for his own personal gain.
Adaptational Relationship Change: With Eddie, the super of the apartment. In the books, Gabe and Eddie were poker buddies while the latter displays sympathy for Percy. Here, Eddie despises Gabe (apparently arguing about a "toilet problem" and the way Gabe eats) and gives his full pity to Percy when he returns from Yancy.
Adaptational Wimp: In the books, he treats Sally like a servant. Here, Sally's able to stand her ground with him and he's clearly unable to force her around and Sally makes it very clear that she's the one running things in their apartment.
Blatant Lies: During his interview, Gabe brands his stepson a dangerous criminal for destroying his Camaro and that he's a violent child who's responsible for Sally's disappearance.
Percy: I'm gonna kill him.
Demoted to Extra: Gabe using the media to label Percy as a dangerous criminal is a major subplot in the book that impedes their quest. Here, it's only given a single mention, thus Gabe's presence in the story is only truly at the beginning and end of the season.
Dies Differently in Adaptation: While he still dies by getting petrified by Medusa's head, Sally doesn't kill him directly like in the books. Instead, like in the film, he dies to his own stupidity, finding the box containing Medusa's head and foolishly opening it.
Lazy Bum: An unemployed lowlife who "earns money" through his online poker games.
Taken for Granite: In The Stinger, after Sally divorces him, he discovers the box containing Medusa's head outside his former apartment. He opens the box, managing to say "That's gross!" as he's turned into a statue.

Others

The Voice in the Dream (Spoiler)

Kronos

Played by: Nick Boraine

The malevolent ruler of the Titans who once ruled the Earth with an iron fist until Zeus overthrew him. He is also Percy Jackson's malevolent grandfather and arch nemesis. The Crooked One appeared as a voice that haunts Percy in his dreams, mocking him by calling the Son of Poseidon "Little Hero".

Abusive Parents: He ate his oldest five children as soon as they were born and would have done the same to Zeus if he hadn't been sent away by his mother, Rhea. When Hades hears his father is returning, he's terrified by it.
Arch-Enemy: Even through he's the original Six Olympians' arch nemesis, especially for the Big Three, he takes a particular interest in Percy, his descendant from Poseidon's side.
Big Bad: The true mastermind behind the theft of the Master Bolt, so the Crooked One attempted to start a war between his sons, Zeus and Poseidon as well as trying to temp his grandson to his side so Percy can return him to the power he once had long ago.
Dark Is Evil: Like his oldest son, Kronos also has a notable motif that has to do with darkness. He manifests in Percy's nightmares, his cloak and utterly untamed beard are black, whenever he appears in Percy's nightmares, it's nighttime, and during the last conversations via dream Kronos has with Percy in "The Prophecy Comes True", he blows out the light in his lantern after showing that he has a very nefarious interest in the boy. Unlike Hades, Kronos is an utterly monstrous being willing to potentially throw the whole world into a war with catastrophic repercussions just to get revenge.
The Dreaded: Hades, the God of the Dead himself, is horrified when he realizes his malevolent father is returning and plotting for revenge.
Evil Sounds Raspy: His dark and ominous words to Percy are all stated in a gravely tone of voice that sounds almost inhuman as well as showing that he is still weakened by his children.
Fate Worse than Death: Both Ares and Hades (the latter who actually took part in the war against his father and might have seen said punishment being delivered first hand) state that, after the Olympians first defeated him, he was literally ripped into a thousand pieces and essentially left to rot in Tartarus. The fact that he has recovered enough that he's capable of masterminding the theft of the Master Bolt in order to get both Poseidon and Zeus to fight each other deeply unnerves Hades.
A Form You Are Comfortable With: In "We Take a Zebra to Vegas", he appears in the form of Percy's old Yancy Academy headmaster when speaking to the Lightning Thief in his dream.
Gruesome Grandparent: Percy's paternal grandfather and 1000% not only willing to try enticing his grandson into helping him strike back against the Olympians, but the fact that he's utterly unrepentant about taking actions that will have cataclysmic repercussions on the world (facilitating the thief of the Master Bolt) out of brutal revenge means that Kronos is pretty vicious and monstrous as grandfather figures go.
In the Hood: His features are obscured by a hooded cloak.
Manipulative Bastard: He is cunning enough to know that stealing the Master Bolt would create great strife between the Olympians (Zeus immediately blames both Poseidon and Percy for the theft while everyone at Camp Half-Blood believes that Hades is the one responsible for the theft) and is perfectly willing to capitalize on the chaos his action will create in order to take revenge on his children.
Poke in the Third Eye: Kronos seems to have the ability to not only detect when someone is spying on him via their dreams, but he has the ability to shape the dreams itself to how it feels like it's assaulting to the observer.
Villain Takes an Interest: As seen in "The Prophecy Comes True", Kronos considers his grandson an important piece in his return to power and all but states that his survival is only beneficial for Kronos. Chiron points out the fact that Luke tried to recruit Percy to his side makes it clear that Kronos has quite a vested interest in the Son of Poseidon.

Nereid

Played by: Jelena Milinkovic

A water spirit who serves under Poseidon's court.

Meaningful Echo: She gives Percy the same advice Sally gave him years ago, which allows him to discover that he can breathe underwater.
Mouth of Sauron: A heroic example. She is sent by Poseidon to speak to Percy after he is pulled into the Mississippi River to help him to embrace his powers. She appears to Percy again in Santa Monica to deliver another message from Poseidon and gives him four pearls for his journey to the Underworld.

Charon

Played by:

The Ferryman of the Underworld who leads deceased souls through the River Styx.

Adaptation Expansion: Inverted. In the books, Charon had a brief side-plot where he expressed dissatisfaction with his job and allowed the trio to pass the River Styx on the condition that they request Hades to give him a raise. None of that is brought up in this series, with Charon immediately siccing Cerberus on the kids the second they try to bribe him.
Adaptational Seriousness: Charon in the book was characterized as a sleazy record executive type obsessed with Italian suits and only agreed to let the kids through if they promised to beg Hades to give him a pay raise, to which Hades responds with exasperation that Charon has become insufferable ever since they moved to America. Here, he's depicted like how he typically is as a dark, serious figure guiding the dead to the Underworld (as opposed to book Charon, who had a pileup of souls waiting to be led across due to his own laziness).
In the Hood: Charon is seen wearing a black hood over his face when he meets our trio.
Screw the Money, I Have Rules!: Unlike the book and the film, Charon is not happy to see three living kids in his presence and when they try to bribe him with golden drachmas, he summons Cerberus to chase them off.
Truer to the Text: Unlike the self-serving, flashy and unmotivated being he was in the original novel, this Charon bears a closer resemblance to to his classical mythological depiction, being a Grim Reaper-esque figure who takes his job ferrying souls through the afterlife very seriously.

Fates

Played by: Joyce Robbins, La Nein Harrison, and Cindy Piper

Consisting of Clotho, Lachesis, and Atropos, the Fates are the Greek personifications of destiny; Clotho spins new yarn, Lachesis weaves it, and when it's a mortal's time to die, Atropos cuts their thread.

Adaptational Context Change: In the book, Percy watches Atropos cut the thread. Here, it's Annabeth who sees the string get cut instead.
Adaptational Late Appearance: They appear in the second chapter of The Lightning Thief, but don't show up until Episode 5, which covers Chapters 14 and 15.
Portent of Doom: They appear to Annabeth and Grover under the arch, with Atropos cutting a thread.
Race Lift: In the original novel, all three Fates are White. In the episode, one of the Fates stays White, while another is Asian and the other is Black.

Characters / Percy Jackson and the Olympians (2023)

The Trio

Perseus "Percy" Jackson

Annabeth Chase

Grover Underwood