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Characters / The Camp Half-Blood Series: Camp Half-Blood

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The residents of "Camp Half-Blood" of The Camp Half-Blood Series (Percy Jackson and the Olympians, The Heroes of Olympus and The Trials of Apollo). The page contains a list of the staff, Camp/Head Counselors. Though the Council of Cloven Elders is also located in the camp, they can be found here. Other full time residents are also listed here. For the full list of characters, click here.

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    Campers in General 
Sons and daughters of the Greek gods. They have heightened senses and combat skills that take the form of ADHD and their minds are hard-wired to read Ancient Greek, which gives them trouble reading English. Their skills and personalities are inherited from their divine parents (children of Aphrodite will be Love Freaks, children of Athena will be highly intelligent, and children of Apollo will be musically and/or medicinally inclined, as well as a good shot with a bow).
  • Attention Deficit... Ooh, Shiny!: Thanks to their combat skills.
  • Age Lift: Applies to the major characters in the film series; instead of being 12-13 in the first book, they are in their late teens in the first film.
  • Badass Crew: They're a dozens of teenagers being pitted against monsters that are often twice their size. They still manage to throw down with the best of them and usually win.
  • Bastard Bastards: Played with in the evil demigods, most of them are fiercely loyal to their mortal parent but not to the rest of the Olympians, believing they mistreated their mortal parent. Percy tries to resolve this at the end of the series by forsaking godhood in favor of making gods swear on the River Styx to claim their children when they reach 13 and provide cabins to all of the Greek Gods, including the minor ones.
  • The Beautiful Elite: Aphrodite's children especially, although it's implied that this applies to most, if not all, the demigods due to their divine heritage and the gods' propensity for attractive partners.
  • Child Soldiers: Most of them are between the ages of 12 and 20. Though its somewhat subverted in that they are trained for their survival as oppose to being trained as soldiers. The children of Ares are literally born as this.
  • Combo Platter Powers: All demigods are able to dip into their parents' divine domains, meaning that they can have any number of powers depending on who their divine parent is. For instance, Apollo is the god of medicine, archery, the sun, healing, and prophecy, meaning that his children can inherit any number of these powers and specialties. Superhero Speciation is still in force though, so some children may inherit more of a particular aspect than others. So while all of Apollo's children are excellent archers, some, like Will Solace, are better at healing than shooting.
    • Demigods in general also tend to be physically stronger, faster, and tougher than normal humans once trained. This is more pronounced in the children of gods known to be warriors by nature (i.e. the children of the Big Three and the children of Ares). They also have the ability to eat ambrosia and drink nectar to help themselves heal (at the risk of killing themselves if they take too much of it), have built-in combat reflexes (their ADHD), and possess an innate ability to read Ancient Greek (their dyslexia).
    • This trope is a notable divergence from the original Greek myths, as many demigods, even those as powerful as Heraclesnote , had no access to their parents' domains and were instead just extremely talented at what they did. Alternatively, they would have a superpower, but it would be something subdued like Bellerophon's skill at riding horses for being the son of Poseidon.
  • Drives Like Crazy: Chariot races happen monthly at Camp Half-Blood, during which competitors ride Greek chariots pulled by horses while using various weapons to drive their opponents off the track. Penalty for killing someone is no s'mores at the campfire for a week.
  • Everything Trying to Kill You: Being a demigod is very dangerous. Monsters constantly trying to kill you, the gods getting mad at you, getting killed while on a quest, reckless chariot racing...some demigods don't even live long enough to make it to Camp Half-Blood.
  • Gang of Hats: As stated below, each demigod shares some parental-domain-related power with their half-siblings - Aphrodite's children are all ridiculously gorgeous, Hephaestus's children are good with machinery, etcetera.
  • Green Thumb: Demeter's children. Dionysus' twins, too - they work best with grapes, but since their dad isn't allowed to touch anything vaguely related to wine, they settle for strawberries instead (just them walking among the strawberry fields makes them of better quality already).
  • Heroic Bastards: The heroic demigods, anyway, since no one's godly and mortal parents are married.
  • Human Mom Non Human Dad: Played straight or inverted with the demigods' parentage.
  • Iconic Outfit: Their orange Camp Half-Blood T-shirts and bead necklaces, with each bead representing one completed year at camp. Sadly left out of the movie.
  • Kid Hero: Most of them are legally children, though some skirt the line by being in their late teens or cross it entirely by reaching 20 years of age.
  • Kissing Cousins: Due to how interrelated the gods are, almost every case of romance between demigods is this to one extent or another (i.e. Percy is a son of Poseidon and Annabeth is a daughter of Athena, meaning that they're first-cousins-once-removed). This gets a Hand Wave with the explanation that gods don't really have DNA. So while they're technically related relationship wise, there's no actual blood relation between anyone other than siblings.
  • "L" Is for "Dyslexia": Their brains are hardwired for Ancient Greek, making it difficult for them to learn to read and write in anything else, not that this stops the children of Athena from being straight-A students.
  • Magic Is a Monster Magnet: Demigods emit a scent that attracts monsters, which can have the side-effect of putting their mortal families and friends in danger.
  • Neurodiversity Is Supernatural: Their ADHD is due to their bodies acting on combat instinct while their dyslexia is due to being hardwired for Ancient Greek.
  • Ragtag Bunch of Misfits: Their ADHD, Dyslexia, and tendency to bring monsters and trouble wherever they go have made many of the demigods this.
  • Semi-Divine: Half-mortal, half-Greek god, with superpowers derived from their godly parent.
  • Superpowerful Genetics: Powers relating to the domains of their divine parentage. For example, Demeter's children will have Green Thumbs, and Athena's children will be crazy-smart.
    • Children of demigods, known as legacies, are unlikely to have powers (though they may retain personality traits) but their children with other demigods are likely to turn out even stronger.
  • Teen Genius: Children of Athena and Hephaestus. Athena kids are wise and spend their time reading and researching, while Hephaestus kids are good with machinery.
  • Teeth-Clenched Teamwork: Not all of the campers get along and many of them bear grudges against each other for one reason or another, particularly members of the Ares Cabin due to their naturally violent and aggressive tendencies.
  • You Can't Fight Fate: A running theme of the series, justifiable given its origins. However, prophecies being what they are, it's terribly easy to misinterpret one's fate.



Played by: Pierce Brosnan (The Lightning Thief), Anthony Head (The Sea of Monsters)
Introduced as Mr. Brunner, Percy's Latin teacher, Chiron is actually an immortal centaur keeping an eye on Percy. He serves as activities director of Camp Half-Blood and the Voice of Reason.

  • The Archer: Archery is his main form of fighting.
  • Antagonistic Offspring: To Kronos, as are all the Olympians.
  • Badass Beard: He's still rocking an Ancient Greek beard and is among the most badass immortals around.
  • Badass Teacher: He'll defend his students however he can, going so far as to battle the Drakon and Kronos when needed.
  • Bow and Sword, in Accord: He's best known for his talents as an archer, but is also an outstanding swordsman who managed to stalemate Kronos while defending Percy.
  • Cool Teacher: Head of Camp Half-Blood.
  • Gratuitous Latin: Chiron is fluent in Latin (having likely lived all the way through the Roman Empire) and was Percy's Latin teacher until he revealed himself.
  • Herald: Explains the magical world to Percy.
  • The Medic: He's a skilled healer, curing Percy of his pit scorpion bite.
  • Mr. Exposition: See Herald.
  • Multi-Melee Master: He's a master of every form of Greek warfare, including archery, swordsmanship, and Pankraton, having taught these skills to many Greek heroes, including Achilles, Perseus, and (of course) Percy.
  • Obfuscating Disability: We first see him as Mr. Brunner, Percy's wheelchair-bound Latin teacher. Turns out his wheelchair is merely a Hammerspace Hideaway for his horse legs.
  • Our Centaurs Are Different: They can masquerade as normal humans!
  • Parental Favoritism: He has a particular soft spot for some of the demigods under his care, treating Annabeth like his own daughter and teaching Thalia to control the Mist despite not doing so for the rest of the campers, even Percy, whom Chiron is also especially proud of.
  • Parental Substitute: To Annabeth. According to Percy, he's like a second father to her. She's crushed when he is temporarily exiled from Camp Half-Blood in the second book, due to being accused of poisoning Thalia's tree.
  • Really 700 Years Old: The immortal trainer of heroes and all that. At least until it is deemed that his services are no longer needed.
  • Reasonable Authority Figure: To the rest of the camp.
  • Spared by the Adaptation: In Greek Myth, he died after being shot with an arrow poisoned with hydra blood, leaving him in such excruciating agony that he willingly gave up his immortality to be free of the pain. Here he's very much alive and none the worse for wear. That said, All Myths Are True in the series, so it's unknown if this never actually happened or if he was simply revived by Zeus or Hades to train demigods.
  • Super Speed: By "bending distance", Chiron can travel across great distances in a relatively short amount of time.
  • Super Wheelchair: It's a Hammerspace Hideaway for his horse legs.
  • Team Dad: As camp director, this is pretty much his job, providing much needed moral support and leadership in the camp while keeping the superpowered teenagers from causing each other grievous harm.
  • Totally Not a Werewolf: Well, totally not a centaur. While other centaurs are born of Ixion and Nephele, a cloud nymph, Chiron was born of Kronos, making him much older, wiser, kinder, and more powerful than other "true" centaurs.
  • Voice of Reason: To the rest of the camp.

    Mr. D 
For information on Mr. D or Dionysus the Olympian, see here.

The head of security for the camp.
  • Demoted to Extra: He was always an extra, but he hasn't appeared much after the first series.
  • Elective Mute: He can talk but chooses not to. A rumor around camp is that this is because he even has eyes in his mouth.
  • Eyes Do Not Belong There: He is covered in eyes, a hundred of them to be exact.
  • Oh, Crap!: When Morpheus puts all of Manhattan around the Empire State Building to sleep in The Last Olympian, Percy can tell he's freaking out.

    Oracle of Delphi 
The Oracle (real name unknown) that gave the first Great Prophecy. Not much is known about her other then that she was the oracle since she was at least 12. She has been cursed by Hades to never rest in peace and let the Oracle's spirit find a new host until after the Great Prophecy. After the Great Prophecy she has been replaced by Rachel Dare.

  • Fainting Seer: After she gives a prophecy she just becomes a corpse.
  • Glowing Eyes: Her eyes glow when she's about to give a prophecy.
  • Mummy: Is described as such and openly called one.
  • Only Mostly Dead: Had the Spirit of Delphi despite being a corpse.

A son of Athena who survived long to adulthood, eventually hired on by Camp Half-Blood as a teacher. He's also quite secretive about his past.
  • Actually, I Am Him: Pulls this near the end of Battle of the Labyrinth when revealing that he and Daedalus, the inventor of the labyrinth are the same person.
  • The Aloner: Is a rather lonely person in general, and claims to work only for himself.
  • Body Surf: He's put his consciousness into automatons several times.
  • Dirty Coward: Tends to run and hide from his problems rather than face them.
  • Heel–Face Door-Slam: He admits that one reason he betrayed Camp Half-Blood is that Luke promised he could make amends with Perdix for killing him. Luke mocks him for believing that and betrays him in turn, since even if Daedalus got a chance to apologize to his nephew, there's no guarantee Perdix would accept it. They do make up, while Hades has Daedalus working on the Underworld's worlds and basically putting him under undead house arrest.
  • Heroic Sacrifice: Dies to get the Labyrinth, which is tied to his life force, to collapse, and save Camp Half-Blood.
  • Karma Houdini Warranty: He made his escape from Minos, and didn't suffer consequences for creating the Minotaur or the labyrinth. Then he murdered his nephew Perdix, for the crime of surpassing him, and murdered Minos by violating Sacred Hospitality. Minos then became the newest judge of the Underworld and Athena branded him with a partridge that marks him as a kinslayer. Daedalus became obsessed with avoiding death, and couldn't resist temptation when Luke said they would overthrow the Underworld and allow him to make amends with Perdix and Icarus. Luke then rubs it in his face that I Lied and said Minos has dibs on Daedalus's soul when seeming to corner him. Whoops. Daedalus realizes he has to die to truly make amends, and does so.
  • Meaningful Name: Quintus means "fifth" in Latin, and it's the name for the fifth body of Daedalus.
  • The Smart Guy: A master inventor and a genius of his time.
  • What the Hell, Hero?:
    • Athena pulls this on him when he tricks his nephew into falling off a balcony. To be specific, she turns the nephew into a partridge and then brands him with a mark of said partridge, which would never fade.
    • Annabeth tells him that Athena's children are supposed to be wise, not just clever. He realizes she's right, leading to his Heroic Sacrifice and his entrusting of his laptop to her.

    Rachel Elizabeth Dare
"We have to work together to defeat Gaea."

A mortal girl Percy befriends, who is later revealed to be able to see through the Mist. In The Last Olympian, she becomes the host for the Oracle of Delphi.

  • Action Survivor: She isn't a fighter, but is pretty adept at surviving dangerous situations with monsters regardless.
  • Badass Normal: She hit the Big Bad in the eye with a hairbrush.
  • Betty and Veronica: The Veronica to Annabeth's Betty.
  • Bookworm: Mentioned in Battle of the Labyrinth.
  • Brick Joke: The blue hairbrush she used to thwack Kronos in the face with in the previous series makes a reappearance in The House of Hades when Rachel and Grover meet with the Romans.
    • And in The Tower of Nero, where she weaponizes it again as a projectile. She really likes throwing that thing.
  • Brought Down to Normal: The power of prophecy still isn't working by the end of The Blood of Olympus, leaving her without her powers.
  • Chekhov's Gunman: Makes her debut as a random bystander who saves Percy's bacon at Hoover Dam in The Titan's Curse, and becomes a key character in the next two books.
  • Clingy Jealous Girl: Acts like this towards Apollo upon finding out there are four other oracles aside from her.
  • Cloudcuckoolander: Treated this way by normal mortals, as she can see through the Mist. Ironically, this makes her the Only Sane Man, seeing real reality.
  • Does Not Like Shoes: Downplayed, but she's either in sandals or barefoot every time her shoes are mentioned at all. May overlap with Magical Barefooter since it gets more prominent after she takes the power of the Oracle.
  • Demoted to Extra: Has a far less important role in The Heroes of Olympus than in the previous series, besides getting some mentions, an appearance in the first book, and an appearance in a dream (alongside Grover) in the fourth.
  • Did You Just Flip Off Cthulhu?: Famous for hitting Kronos in the eye with a blue plastic hairbrush.
  • Fainting Seer: As of becoming the mortal host for the Oracle of Delphi in The Last Olympian. She zones out and the spirit of the Oracle takes over her body, using it to recite prophecies. Lampshaded when Rachel worries about this happening in the middle of class.
    • And then in The Tower of Nero, Python possesses her, being in control of the Delphic Oracle at the time.
  • Fiery Redhead: Spirited and passionate, with curly red hair.
  • Foil: To Octavian.
  • Full-Name Ultimatum: In The House of Hades, she addresses Reyna by her full name.
  • Genki Girl: A mild form, but she talks a lot and is very enthusiastic.
  • Heroes Want Redheads: Played with. She likes Percy, but so does Annabeth, making a Love Triangle. Ultimately, it's subverted, since Percy ends up with the blonde Annabeth instead of redhead Rachel.
  • Improbable Weapon User: Uses, of all things, a blue plastic hairbrush to smack Kronos in the eye with.
  • I See Them, Too: Can see through the Mist.
  • I Want My Beloved to Be Happy: See the below trope for elaboration.
  • Loving a Shadow: More or less, Rachel's attraction to Percy rooted from her inevitable destiny to become the next Oracle.
  • Out of Focus: Doesn't appear in the second and third books, although she returns in the fourth.
  • Plucky Girl: Roadtrip to almost-certain-death? Why not?
  • Rebellious Princess/Tomboy Princess: Modern version, as a business heiress. Prefers hanging in jeans with demigods, than attending the fancy academy her father has planned for her.
  • Romantic False Lead: To the Percy/Annabeth pairing.
  • Romantic Runner-Up: In the end, Percy gets together with Annabeth instead of her. She doesn't mind, though, becoming the host for the Oracle and all.
  • Secretly Wealthy: The Dares are loaded.
  • Ship Tease: With Percy.
  • Significant Green-Eyed Redhead: As an Ascended Extra who eventually becomes the next Oracle.
  • Unfazed Everyman: Until the The Last Olympian.

    Cleaning Harpies 
Three harpies named Aello, Celaeno, and Ocypete. The three work at the camp washing the dishes and eating any demigods they catch out sneaking out of their cabins at night.


Camp/Head Counselors

    Annabeth Chase 
For information on Annabeth go here.

A son of Iris.

A son of Hypnos.

  • Animal Motifs: He's described as looking like a baby cow.
  • Asleep for Days: Because of being a child of the god of sleep.
  • Butt-Monkey: To an extent. The last time we see him in The Lost Hero, Butch is trying to see how many pencils he can shove up Clovis's nose. Twenty.
  • Dream Weaver: As a son of Hypnos, he spends most of his time in dreams and has a lot of power over them.
  • Erudite Stoner: A Sleepy Head that has a lot of insight into the fluid nature of gods and the retention and retrieval of memory.
  • Heavy Sleeper: He's very difficult to wake up.
  • Really Fond of Sleeping: As the son of the god of sleep, Hypnos, Clovis is perpetually sleepy and frequently dozes off. Because of this, he's extremely knowledgeable about the nature of dreams and the gods, attempting to use his powers to restore Jason's missing memories before informing him that they were stolen by the gods rather than suppressed.
  • Running Gag: Constantly falling asleep.
  • Sleepyhead: He's perpetually sleepy and he dozes off all the time and almost anywhere.

    Connor & Travis Stoll
Sons of Hermes—not twins, but a year apart. They succeed Luke as co-counselors of Cabin Eleven and the main pranksters of Camp Half-Blood.

  • Breaking the Fellowship: Travis is off at college by the time of Trials of Apollo, leaving Connor as the sole Head Counselor of the Hermes Cabin. Connor is said to have mellowed out considerably because of this, but his younger half-siblings pick up the pranking slack.
  • Butt-Monkey: They frequently get retribution for their pranks. Annabeth nearly killed Connor after he slipped a tarantula into her bunk. The Aphrodite cabin forced Travis to wear permanent makeup that made him look like a clown while Connor's clothes were all shrunk two sizes. Connor also got poked in the eye after doing something that annoyed Meg.
  • The Cobbler's Children Have No Shoes: Their father is the god of thievery, but they're notoriously bad at stealth.
  • Human Mom, Non-Human Dad: Their dad is Hermes, so their mom is presumably a mortal woman.
  • The Gambler: Both of them love playing poker since their father is the god of money and wealth, meaning that they're very good at it and use it to get free stuff from the other campers.
  • Javelin Thrower: In The Sea Of Monsters, the brothers throw javelins at the Ares Cabin's chariot.
  • Identical Twin ID Tag: They're not twins but the only way to tell them apart is to remember that Travis is the older one and slightly taller than Connor.
  • Let's Get Dangerous!: Both brothers each lead half of the Hermes Cabin to battle Kronos' forces on the Brooklyn Bridge and Manhattan Bridge, surviving their battles with only minor injuries and few casualties on their side, implying that the Stoll brothers are surprisingly good fighters and leaders.
  • Meaningful Name/Punny Name: Lampshaded: their father is the god of thieves and their last name is Stoll (pronounced "stole"), which Percy found hilarious (not that they got the joke).
  • Messy Hair: They're said to have mops of curly brown hair that hang over their eyes.
  • Moment Killer: The brothers throw Percy and Annabeth into the lake just as Seaweed Brain and Wise Girl were about to kiss, but they just end up giving them the "best underwater kiss of all time".
  • Mr. Vice Guy: They're nice, loyal, and fun to be around, but are constantly plagued by their Sticky Fingers and insatiable need to pull pranks on others, which often gets them into more trouble than it's worth.
  • The Prankster: Just like their father, the god of thieves. They enjoy pulling pranks on other campers that can range from harmless (painting a mango gold and labeling it "for the hottest" to watch the Aphrodite's kids fight each other for it or filling a sleeping bag with shaving cream) to mean-spirited (handing Phoebe a T-Shirt sprayed with poisonous centaur's blood so that she would break out in painful hives), but this last one was at the behest of Aphrodite. Percy says that there's always a gleam in their eyes that made you think they were ready to drop a firecracker down your shirt.
  • Sibling Team: They always work together, stealing and playing pranks.
  • Skewed Priorities: In The Last Olympian, when Morpheus puts the entire population of Manhattan to sleep, Connor is delighted because he has an opportunity to loot a massive candy store. Katie Gardner has to remind him that they're in the middle of a massive war.
  • Sticky Fingers: They're nice and easy to get along, but Percy advises the reader to keep one hand on their wallet at all times while around them.
  • Trap Master:
    • Owing to their prankster ways, they're good at setting traps in preparation for oncoming enemies, though they don't always get them right where they want them.
      Travis: What do you mean we placed the land mines on the wrong hill?
    • Played straight from both ends, since they stole the land mines in question from where they had originally been planted around the Ares cabin.
      Clarisse: How do you steal live land mines?
  • Uncanny Family Resemblance: They look virtually identical to each other even though they're a year apart, causing others to mistake them for twins.
  • Those Two Guys: Always around to comment on the camps' goings-on.
  • With Catlike Tread: Even though they're the sons of the god of thievery, Percy says that they aren't particularly stealthy, stumbling over each other and cussing in the middle of Capture the Flag.

    Jason Grace 
For information on Jason go here.

    Katie Gardner 
Daughter of Demeter and counselor of Cabin 4 during the summer months.
  • Green Thumb: As part of her heritage. During the battle of Manhattan, she and her siblings turned an area into a veritable jungle to hold off Kronos's forces.
  • Meaningful Name: Her last name is Gardner and her mother is the goddess of plants. You do the math.
  • Sitcom Archnemesis: The Stoll brothers are hers. According to Percy, she's hated them ever since they decorated the grass roof of the Demeter cabin with chocolate Easter bunnies.

    Leo Valdez 
For information on Leo go here.

    Lou Ellen Blackstone 
Head counselor of Hecate Cabin at Camp Half-Blood. Makes a brief appearance in The Lost Hero, but gets an expanded role in Blood of Olympus.

  • Back for the Finale: Her appearance in The Lost Hero is extremely brief, but her role is expanded greatly in Blood of Olympus, where she fights right alongside Nico and Will during the climax.
  • Baleful Polymorph: Can inflict this on enemies with her "pig balls".
  • Black Magician Girl: Has the powers, and is definitely a bit of a Troll.
  • Cloudcuckoolander/Nightmare Fetishist: For one thing, at the end of Blood of Olympus she tries to keep the group of Roman soldiers that she'd previously Baleful Polymorphed into pigs as pets.
  • The Gadfly: Loves to troll her fellow campers. During the counselor meeting in Lost Hero, Jason notices her using magic to play "Got Your Nose" with a fellow counselor's actual nose.
  • Master of Illusion: Like, Hazel, she can manipulate the Mist, but isn't quite as good at it.
  • Squishy Wizard: Powerful magician, but not much of a close-range fighter.

    Miranda Gardiner 
Daughter of Demeter and head counselor of Cabin 4 during the winter months. She's missing at the time of The Hidden Oracle.

    Nico di Angelo 
For information on Nico go here.

    Perseus "Percy" Jackson 
For information on Percy go here.

    Piper McLean 
For information on Piper go here.

    Sherman Yang 
Son of Ares and the current counselor for Cabin 5.
  • Hidden Depths: It is revealed in Camp Half-Blood Confidential that he isn't all brute force and can be quite manipulative, as observed by his brother Ellis.
  • Manipulative Bastard: Somewhat parodied in Camp Half-Blood Confidential, where he manipulates several campers into doing his cabin's chores for them.
  • Official Couple: With Miranda Gardener.
  • Meaningful Name: Possibly named after William Tecumseh Sherman, a Civil War general previously stated to be a son of Ares.

    Thalia Grace 
Since the cabin of Artemis is empty most of the time Thalia can be found here.

    Will Solace 
A son of Apollo. Returning character from Percy Jackson and the Olympians.

  • Anger Born of Worry: At the end of Blood of Olympus he's upset that Nico hasn't stopped to rest after the battle with Gaea.
  • Ascended Extra: He's a minor character in The Last Olympian, but makes a return as a more prominent supporting character. Taken Up to Eleven in the last portion of The Blood of Olympus, where he partners up with Nico throughout the last battle and afterward. He's given more focus in The Trials of Apollo due to his relation to the main protagonist and accompanies Apollo on his quest in the finale.
  • Back for the Finale: Along with the rest of the Camp Half-Blood crew in The Blood of Olympus, he shows up during the war scenes.
  • Belligerent Sexual Tension: His bickering with Nico in the final book comes off as this.
  • Big Damn Heroes: In The Tower of Nero, he shows up with Rachel, Lu and the troglodytes to rescue Nico and Apollo. But mostly Nico.
  • Combat Medic: Besides the medical skills, he's also an active participant in the final battle against Gaia and the battles in the previous series.
  • Catchphrase: Downplayed, but twice now he's used "Doctor's orders" to boss Nico around.
  • Fanboy: For Star Wars. Implied to also be one for Star Trek, if his conversation with Jason and Leo during Leo's claiming was anything to go by.
  • Full-Name Ultimatum: Receives one from Nico in The Tower of Nero.
    William Andrew Solace,” Nico said, “do you have something to confess?”
  • Lampshade Wearing: Played for Laughs in The Tower of Nero, where the troglodytes make him wear one as a Nice Hat.
  • Light 'em Up: It is revealed in The Tower of Nero that he can glow in the dark.
  • Make Me Wanna Shout: His father's role as the god of music lets him whistle in the ultrasonic range. It's bad enough to stun the entire Twelfth Legion.
  • Meaningful Name: His surname, Solace, contains the word "sol," which suitably for the son of Apollo, is Latin for "sun." Also, "solace" can be read as a verb, meaning that he is someone who "will solace," which corresponds with the potential of his healing talents. He also brings solace to Nico di Angelo, child of death, who is perhaps more in need of comfort, appreciation, warmth, and sunshine than anyone else.
  • The Medic: As a child of Apollo, he's skilled with healing. He even delivered Mellie and Hedge's baby, though he was squicked out by it.
    • He runs Camp Half-Blood's infirmary for a reason. Apollo admits that Will is the better healer between them.
  • Nerves of Steel: By necessity. As head counselor, he tries to keep his siblings calm.
  • Nice Guy: Although he has to force Nico to accept his kindness most of the time. He manages to keep his cool under all types of tight situations, never losing his cool with Apollo.
  • No Badass to His Valet: Will being the valet; he's not afraid to tell off either his formerly-divine dad or his scary powerful boyfriend if he thinks they're being stupid. Even in Heroes of Olympus, he refuses to buy Nico's badass-loner schtick and doesn't hesitate to order him around.
  • "No. Just... No" Reaction: Basically, the look on his face when a hyper Leo asks him when he will have the chance to use a sword.
    • A more serious version occurs when he more or less orders Nico not to use his shadow-traveling ability.
  • Non-Action Guy: Admits he lacks many of Apollo's combat skills and his tactic when encountering hostile Romans is to run away and cause a diversion. It's implies this status bothers him.
    Will: "I wish I was a better archer. Actually I wish I could use any of my father's gifts to stop this war. Unfortunately I'm just a healer."
    • Even in his finest hour, he uses Refuge in Audacity instead of anything badass with a weapon, and makes no attempt to provide offensive action against the enemy.
  • Official Couple: With Nico as of The Hidden Oracle.
  • Power Glows: This turns out to be a power of his, as shown various times throughout The Tower of Nero. He even gets compared with a lamp at least twice throughout the book.
  • Second Love: To Nico, after Percy.
  • Ship Tease: With Nico di Angelo, as of the end of Blood of Olympus.
  • Surfer Dude: Has the look, though his personality is more Dr. McCoy Jr.
  • Team Dad: To his cabin mates. Gets kind of awkward when their actual dad is present.
  • Tsundere: His bickering with Nico makes him come across like this.

Cabin 4 (Demeter)

    In General 

  • Green Thumb: They have the power to make plants grow. Percy grumbles that they have the advantage during cabin inspection because they can cover their cabin with plants and flowers just by snapping their fingers.
  • Out of Focus: Demeter's children are primarily background characters in the first series. They get more spotlight in The Trials of Apollo, when Meg becomes a central character.
  • Supreme Chef: It's part of their mother's domain.

    Billie Ng 
A daughter of Demeter.

    Meg McCaffrey
A demigod daughter of Demeter, whom Apollo must serve, and one of the primary characters of The Trials of Apollo.
  • Abusive Parents: Nero was this to her. It helps explain a lot of her stranger behaviors.
  • Affectionate Nickname: Called "Sapling" by her mentor and legal guardian, Lu.
  • Do Not Call Me "Paul": Prefers not to be called "Margaret."
  • Familiar: Meg has the rare ability to control karpoi, specifically one she calls Peaches.
  • Dual Wielding: Meg can summons two scythes to do battle, and does so quite effectively for an untrained Half-Blood.
  • Green Thumb: As the first major child of Demeter, Meg can commune with plants and summon agrarian monsters like Peaches to help her do battle.
  • Heel–Face Revolving Door: She betrays Apollo for Nero, only to help Apollo defeat Nero after discovering the terrible atrocities the latter is planning to commit. Then she leaves Apollo to go back to Nero, only to later run away from Nero's henchmen and rejoin Apollo.
  • Improbable Weapon User: Meg is introduced using her powers to pummel two thugs with a rotting apple.
  • Ironic Allergy: Despite being a daughter of Demeter, she is allergic to oaks, which poses slight complications when there is an oak tree planted smack in the middle of the Demeter Cabin.
  • Kiddie Kid: Often acts and dresses in ways that make her come across as younger than she is - wearing bright, multicolored dresses and socks, being a messy eater, shamelessly picking her nose, doing random cartwheels as she walks, etc. Apollo sometimes describes her as seeming like an overgrown kindergartener.
  • Little Miss Badass: She's no more than 12 years old, yet she kicks an Ares cabin member in the crotch, fights off two street thugs in an alley with nothing but garbage, and can fight giant ants despite being afraid of bugs.
    • Apollo notes she's higher caliber than most of Demeter's offspring being able to summon a karpos.
  • Mood-Swinger: Meg's normally extremely high energy and can even be a pest, but she'll shut down immediately if she gets uncomfortable or is forced to remember the lesser parts of her past.
  • More Than Mind Control: A particularly horrific case is employed on her by the Beast. Meg is terrified of him from her previous encounters on the streets of New York, and Nero convinces her the Beast is an entirely different person from him, leaving her both terrified and completely loyal to her abuser.
  • The Not-Love Interest: Meg is Apollo's closest friend during his latest expulsion from Olympus, but there's no suggestion of anything romantic between them (obviously, since he's immortal and she's 12). Not only is he utterly devastated when she betrays him to Nero, but a lot his motivation for fighting Nero and the Triumvirate is to free Meg from their grasp.
  • Pokémon Speak: Meg's karpos only repeats his own name; Percy describes it as "Groot speak."
  • Teleportation: Much like Nico and shadow-travel, she can transport herself quite a distance away. All she needs is a plant, even a single dandelion will do.
  • Street Urchin: Meg spends most of her time wandering the streets rather than sticking to one place to attract monsters.
  • Wicked Stepfather: Has one of these. Deconstructed as her characterization throughout the series involves her coping mechanisms from having to live with his abusive and gaslighting behaviour, and she eventually confronts and snaps back at him, and helps Apollo realize the abusive behaviour of his own father and learn to distance himself from Zeus ultimately.
  • Why Did It Have to Be Snakes?: Fittingly, bugs petrify Meg and she's not pleased to hear of the giant ants roaming Camp Half-Blood's woods.

Cabin 5 (Ares)

    In General 

    Clarisse La Rue 

Played by: Leven Rambin

Voiced by: Marisol Romero (Latin-American Spanish), Mutsumi Tamura (Japanese)

Daughter of Ares and head counselor of Cabin Five, Clarisse frequently bullies new campers and her first appearance involves trying to shove Percy's head in a toilet. She and Percy never get along, but they do develop respect for one another.

  • Achilles in His Tent: In a particularly brilliant History Repeats example, Clarisse refuses to let the Ares campers join the Battle for Manhattan because they believed they deserved a chariot they and the Apollo campers had been fighting over (which eventually went to the Apollo cabin). Just when they're on the losing side, Silena impersonates Clarisse and leads them into battle, getting killed in the process. Hence her subsequent Roaring Rampage of Revenge. Guess who did this before? Achilles, after his beloved best friend/cousin/lover Patroclus's death. Then she dragged the Drakon's skeleton behind her chariot, like Achilles did with Hector's corpse.
  • Action Girl: She isn't the head counselor of the war god's cabin for nothing.
  • 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. In the film, she's played by the classically beautiful Leven Rambin.
  • Animal Motifs: The boar and, less flatteringly, the pig.
  • Badass Boast: "I AM CLARISSE, DRAKON-SLAYER! I will kill you ALL!"
  • The Big Girl: Of all the female characters in the series, Clarisse is the most adept at physical combat, thanks to her masculine physique.
  • Blade on a Stick: Her Weapon of Choice is a barbed spear that electrocutes its targets.
  • Blood Knight: Takes after her papa.
  • Boyish Short Hair: Hacks off most of her hair during her quest in The Titan's Curse, though she grows it back out in The Battle of the Labyrinth.
  • Brawn Hilda: She has the body of a huge, musclebound, size XXXL male rugby player, thin stringy-looking hair, foul body odor, and (if Percy's "female(ish)" comment in The Demigod Files is anything to go by) a rugged, manly face.
  • The Bully: Initially. She begins to mellow out as the series goes on and she gets a boyfriend.
  • Cool Helmet: Wears a uniquely boar-shaped helmet, presumably to symbolize her status as head counselor of the Ares Cabin. It becomes a plot point later when Selena impersonates Clarisse to lead the Ares Cabin into battle.
  • Face of a Thug: She's huge, built like a swole man, and has a brutish, manly face that is heavily scarred and only capable of emoting "evil sneer[s]". She's also Silena Beauregard's best friend and nursed Chris Rodriguez back to (physical) health after rescuing him from the Labyrinth.
  • The Friend Nobody Likes: The other campers may fear her, but they don't seem to respect or like her that much. Someone tapes a "You Moo, Girl!" note to her back in the second book, and everyone calls her electric spear "Lamer" behind her back.
    • The second book also implies that nobody in her cabin wanted to accompany her on her quest, despite its being vital to saving Camp Half-Blood and pretty much guaranteed to win them glory if they succeed.
  • Full-Boar Action: Owns a set of boar-themed armor with an appropriately-shaped helmet.
  • Gag Nose: Has a huge, aquiline nose in the graphic novels.
  • Glory Seeker: Seeks fame and glory, much like Ares's War Is Glorious mindset.
  • Hidden Depths: She turns out to be a Jerk with a Heart of Gold. She's also secretly afraid of disappointing her father, as shown in The Sea of Monsters.
  • History Repeats: See Achilles in His Tent above.
  • Human Mom, Non-Human Dad: Her father's Ares so her mom is presumably a mortal woman.
  • Human Popsicle: For a short while during the battle of Manhattan.
  • I Call It "Vera": She calls her second electric spear "Maimer". (Everyone else calls it "Lamer".)
  • Jerk Jock: Initially, she's the brawny kind who stuffs peoples' heads down toilets.
  • Jerk with a Heart of Gold: Matures into this around the fourth book.
  • The Lad-ette: She just as tough, possibly even more, than the other sons of Ares.
  • Lady Looks Like a Dude: Implied in the books. The graphic novel takes this Up to Eleven to the point that her face is indistinguishable from an adult man's in close-up shots, minus the facial hair.
  • Large Ham: Clarisse would like you to know that she is CLARISSE, DRAKON-SLAYER!
  • A Mother to Her Men: Clarisse may be a big mean bully, but even she cares about her soldiers. In The Sea of Monsters, she stops yelling at Annabeth to go look after her campers after they're wounded fighting giant bronze bulls.
  • Muscles Are Meaningful: Unlike the slender-yet-toned Annabeth and Thalia, Clarisse is introduced as the resident fat girl with Stout Strength who builds up muscle mass during the last two books. By the start of The Last Olympian, she's "as big and beefy as a [male] rugby player" and has the athleticism to match.
  • Odd Friendship: With Silena.
  • Official Couple: With Chris.
  • OOC Is Serious Business:
    • In book 4, whatever happened to her in the Labyrinth made her so terrified of it that not even Travis Stoll calling her chicken could make her go back in.
    • In book 5, she is so angry at the Ares cabin being dissed that she and her cabin refuse to join the other demigods in defending Olympus. We repeat: Clarisse refused to join what could have possibly been the biggest and most monumental battle of her life.
  • Pet the Dog: Her concern for and friendship with Chris and Silena.
  • Put on a Bus: Mostly absent from the events of The Titan's Curse.
    • In The Trials of Apollo she has stepped down as a counselor and left Camp Half-Blood to attend the University of Arizona.
  • Red Is Heroic: Subverted. She wears bright red armor and is one of the best fighters at Camp Half-Blood but is (to everyone not named Chris or Selena) a selfish Jerkass bully who at her worst will abandon her allies for the sake of pride or glory.
  • Red Oni, Blue Oni: She's the red oni any time she works with anyone else, period. Which is not often.
  • The Rival: To Percy.
  • Roaring Rampage of Revenge: When the Drakon fatally wounds Silena.
  • Shock and Awe: Likes to use electric spears in combat.
  • Stout Strength: Implied to be obese in the first book and has "hands like iron" (referring to her grip strength); even after building up muscle over the course of five books, she's still more burly than ripped.
  • Tomboy and Girly Girl: Tomboy to Silena's girly girl.
  • "Well Done, Son!" Guy: Like Percy, she's a sucker for her father's good opinion.

    Ellis Wakefield 
A son of Ares. He's gone missing at the time of The Hidden Oracle.
  • Distressed Dude: When Apollo finds him.
  • Recognizable by Sound: As a son of Ares, he can recognize the sound of anything meant for conflict. This extends to knowing the relative distance, size, and identity of a giant automaton.

A son of Ares.
  • The Ghost: He's never been individually pointed out, though he has appeared in groups along with the other Ares cabin members.
  • Meaningful Name: Mark is a derivative of Mars, Ares's Roman form.

Cabin 7 (Apollo)

    In General 
  • Combo Platter Powers: Their father is the god of music, poetry, archery, and healing, meaning they could have one of these skills or any combination of them.
  • Healing Hands: One of their father's domains is healing magic.
  • Improbable Aiming Skills: Apollo's sons and daughters are amazingly good at anything projectile-based thanks to the fact that their father is the god of archery. They can shoot baskets as easily as they can nail bullseyes.
  • It's All About Me: Implied to be a common character flaw among them, given that it's one of Apollo's main traits pre-Character Development. When Austin and Kayla hear that Apollo has become mortal, their first concern is for how it might affect their respective music and archery skills.
  • The Medic: Thanks to their father being the god of medicine.
  • Musical Assassin: Some children of Apollo have power over music.
  • The Straight and Arrow Path: Their Weapon of Choice are bows and arrows.

    Lee Fletcher 
Son of Apollo, and the former counselor of Cabin 7 before his death during the Battle of the Labyrinth.
  • Bludgeoned to Death: The cause of his death was being smashed on the head by a giant.
  • Meaningful Name: The act of fletching refers to attaching the feathers to the arrow shaft, and a fletcher is a person who makes arrows. Apollo is a god of archery. You do the math from there.
  • We Hardly Knew Ye: He dies in the book where he is introduced, Battle of the Labyrinth.

    Michael Yew 
Son of Apollo, and the former counselor of Cabin 7 before his death during the Battle of Manhattan.
  • Meaningful Name: Yew is a wood popular in the use of bows, befitting a son of Apollo, who is associated with archery. Yew trees are also associated with graveyards and the dead, foreshadowing Michael's (presumed) death later on.
  • Never Found the Body: All that was left of him was his bow.
  • Sacrificial Lion: He is the first named character to die in the Battle of Manhattan.
  • Sonic Stunner: An archery variation. Apollo gifted him sonic arrows at some point, which emit a screaming sound when released and generate shockwaves that can destroy lesser monsters.
  • You Are in Command Now: Was Cabin Counselor of Cabin 7 after Lee Fletcher was KIA in Battle of the Labyrinth. It didn't last long.

    Austin Lake

"What's going on? Also, where is my saxophone?"

Son of Apollo and Latricia Lake, a music theory teacher. His main gift inherited from his father is skill with music; he favors the saxophone, but he'll challenge himself with other instruments.

  • Ascended Extra: Even more minor than Will— Will at least had dialogue occasionally. Pre-Trials of Apollo, he is mentioned once in The Last Olympian, and... that's it.
  • Cool and Unusual Punishment: Threatens to curse people to speak in rhyming couplets. It's quite possible that he's the one to blame for one Ares camper's predicament in an earlier book.
  • Instant Web Hit: His last music video got 500,000 views in a week.
  • Musical Assassin: He can cause a stampede by playing Pop Goes the Weasel on his sax, among other things.
  • Skewed Priorities: Shares this with Kayla. Wants to keep his videos up.
  • Signature Instrument: The tenor saxaphone, which doubles as a Swiss Army Weapon due to the various attachments it has.
    Apollo (narrating): [Austin] carefully removed a long brass rod from the body of his sax. He had all sorts of nonstandard attachments on his instrument, including a bag of exploding reeds, tone-hole cleaners that doubled as zip-ties, and a stiletto knife for stabbing monsters and unappreciative music critics.

    Kayla Knowles

"I can't even qualify for the Olympics until I'm sixteen!"

Daughter of Apollo and archery coach, Darren Knowles. Kayla is the archery instructor at Camp Half-Blood.

  • Ascended Extra: Even more minor than Will— Will at least had dialogue occasionally. Pre-Trials of Apollo series, she is mentioned once in The Last Olympian, and...that's it.
  • Canada, Eh?: Her mortal father, Darren, is Canadian, making her the second Canadian to appear in the series after Frank Zhang.
  • Has Two Mommies: Or, in her case, two daddies.
  • Homosexual Reproduction: She is the biological child of Apollo and Darren Knowles. Apollo was a god, so regular reproductive laws might not apply.
  • Skewed Priorities: Seems more concerned with Apollo's mortality possibly costing her abilities, making her unable to try out for the Olympics.
  • The Straight and Arrow Path: She leads Apollo's archery class and is shocked by his ridiculous standards for his own archery skills.
  • You Gotta Have Blue Hair: Her short ginger hair is described to be "dyed with a shock of bright green".

    Jerry, Gracie, and Yan 
Three children of Apollo introduced in The Tower of Nero.

Cabin 8 (Artemis)

    The Hunters 
While not permanent residents, Cabin 8 is kept for their use during their infrequent visits. For tropes on them, see the Servants of the Gods page.

Cabin 9 (Hephaestus)

    In General 

  • Gadgeteer Genius: Experts at forging weapons and building machines.
  • Wrench Wench: Daughters of Hephaestus are just as good with mechanics as his sons.

    Charles Beckendorf

Son of Hephaestus and constantly hanging out in the camp's metal forges. Can build bombs.

  • Affectionate Nickname: His girlfriend calls him "Charlie."
  • Beware the Nice Ones: He's a great guy to have around, but he is absolutely brutal when it comes to chariot racing.
  • The Big Guy: Expected from a son of Hephaestus.
  • Black Guy Dies First: The first half-blood to die in The Last Olympian.
  • Brother–Sister Incest: Averted in the case of his and Silena's relationship, considering the fact that in the fifth book, it is explained that gods do not have DNA, and thus makes any arguments against inter-camp relationships null and void; with the one exception of two people from the same cabin.
  • Fatal Family Photo: He just had to show off a picture of his girlfriend right before he raids the Princess Andromeda...
  • Cool Big Bro: To Percy. He's older and an experienced demigod, but has no problems befriending Percy. Unlike Luke, he remains this trope throughout the series.
  • Gadgeteer Genius: As a son of Hephaestus, he's very talented with machinery.
  • Genius Bruiser: As a son of Hephaestus, Beckendorf has mad engineering skills.
  • Gentle Giant: Large and well-built, but a down-to-earth Nice Guy.
  • Heroic Sacrifice: Blows himself up in order to land a hit on Kronos.
  • Human Mom, Non-Human Dad: His dad's Hephaestus, so his mom is presumably a mortal woman.
  • Last-Name Basis: Is referred to as Beckendorf by virtually everyone (except Silena).
  • Nice Guy: One of the friendliest camp counselors, and looked up to by everyone. He's even kind to Tyson when no one else is, showing him how to forge weapons.
  • Official Couple: With Silena.
  • Outgambit: He manages to play Kronos, the Big Bad, like a fool. Beckendorf my man, you get mad props for that.
  • The Quiet One: Percy notes that Beckendorf was a guy of little words, but when he spoke everyone tended to listen and respect what he was saying.
  • Sacrificial Lion: Killed to show just how dead serious Kronos and co. are.
  • Scary Black Man: A heroic version; Percy describes him as the type that monsters would run from.
  • Together in Death: With Silena.


An 8-year-old son of Hephaestus.

  • Death Course: Designed one for the campers to complete.
  • Determinator: See I Will Find You below.
  • Genki Guy: One thing that Apollo notices about him all the time is that he jumps up and down constantly. He obviously doesn't do it when the Three-Legged Race goes into disarray.
  • The Heart: Apollo notes that it's just take one look at Harley to find why anyone would even bother to do all his games: he's just too damn cute, adorable, and happiness-bringing.
  • I Will Find You: He is quite adamant on using his beacon to call to Festus, even after six months of Leo being missing.
  • It's All My Fault: When Austin and Kayla went missing during the race, he breaks down and starts to blame himself.
  • My God, What Have I Done?: After finding out Kayla and Austin went missing during his death race.
  • Nightmare Fetishist: Seems rather excited at the prospect of people dying during his death course through the reformed Labyrinth. Subverted later when two campers actually do go missing during the race.

    Jake Mason 
The head counselor of Cabin 9 after Beckendorf's death.
  • Bandage Mummy: When he's first introduced.
  • Field Promotion: How he got his job. Averts it himself, as he willingly gave the position to Leo after the discovery of Bunker 9.
  • Meaningful Name: A mason is a builder, albeit one of buildings rather than machines.

    Nyssa Barrera 
Daughter of Hephaestus and temporary head counselor during Jake Mason's injuries.

Cabin 10 (Aphrodite)

    In General 

  • The Beautiful Elite: Noted to be supernaturally beautiful.
  • Charm Person: A rare few of Aphrodite's children have the ability to "charmspeak".
  • The Fashionista: The worst punishment they can imagine is having to wear ugly nurse shoes that don't go with anything.
  • Gossipy Hens: They spend most of their time spilling the tea and doing their hair instead of participating in camp activities.
  • Non-Action Guy: Aphrodite's children prefer to stay out of combat. Before the battle against the Titan forces in The Battle of the Labyrinth, they are seen straightening everyone's armor and offering to comb the tangles out of other campers' horsehair plumes.
  • Valley Girl: Almost all of them fit the trope to some degree, regardless of gender. They tend to be very fashion-conscious with a preference for designer brands, and their sentences are usually peppered with "like", "totally", "so", and "oh my gods". The only complete exception is Piper, who ironically actually does live just a few miles outside the San Fernando Valley when not at camp.

    Drew Tanaka 
A daughter of Aphrodite and also former head counselor of her cabin. She also appeared in The Serpent's Shadow.

  • Alpha Bitch: She fits the general trademarks: snotty, beautiful (she is one of Aphrodite's daughters, after all), and always gets her way. Until the end of The Lost Hero, where Piper kicks her out of the role as head counselor of the Aphrodite cabin.
  • Asian Airhead: She isn't the sharpest tool in the shed, to say the least, and she's specifically described as Asian (presumably Japanese because of her surname).
  • Bitch in Sheep's Clothing: Acts nice, but it's a only a front for her rather nasty personality.
  • Charm Person: She and Piper are the only known demigods capable of charmspeaking as of now.
  • Evil Counterpart: To Piper. They're both daughters of Aphrodite and have the rare "charmspeak" ability, but Drew uses it to bend the other Aphrodite campers to her will, as opposed to Piper.
  • Gender-Blender Name: A female camper named Drew.
  • Girl Posse: Outside of camp, she has one at her school in The Serpent's Shadow of The Kane Chronicles.
  • Jerkass: She deliberately antagonizes everyone who isn't on her side.
  • Jerkass Has a Point: No one contests her when she mentions Silena betrayed them because it was true.
  • Popular Is Dumb: Drew is the Alpha Bitch at camp, but doesn't have the smarts to back it up.
  • The Rival: To Piper in The Lost Hero.
  • Speak Ill Ofthe Dead: She's the only one who calls Silena Beauregard a traitor.
  • Took a Level in Kindness: Possibly. Although Piper describes her as bratty, she's apparently become at least less enough of a jerkass to be relieved at Piper's survival and return in the final book, though it's also mentioned it's "probably because [Piper] could run things and give Drew more time for gossip and in-cabin beauty treatments".

A daughter of Aphrodite. Along with Drew, she appears briefly in The Serpent's Shadow.

A son of Aphrodite.

  • Nice Guy: He's friendly to Piper and helps her settle in at the Aphrodite cabin, even when Drew antagonizes her.

    Silena Beauregard

Daughter of Aphrodite, ergo stunningly beautiful and in love with love. Extremely talented with handling pegasi. Hooks up with Beckendorf between the fourth and fifth books.

  • Anti-Villain: In the final book, she turns out to be The Mole for Kronos, but only because she'd been charmed by Luke into telling him everything and then blackmailed into keeping it a secret.
  • The Beastmaster: Pegasi, although we never see her use it in an actual fight.
  • Berserk Button: Children of Aphrodite don't usually participate in capture-the-flag. But when it's against the Hunters...
    "I'll show them 'love is worthless'. I'll pulverize them!"
  • Death by Disfigurement: Her face is burned off by acid. Ouch, Silena.
  • Death by Irony: A daughter of Aphrodite dies as a result of horrific acid burns.
  • El Cid Ploy: Disguises herself as Clarisse in order to fool the Ares cabin into fighting in the war. It works, but at the cost of her own life.
  • Go Out with a Smile: She dies with a smile on her face, thinking of Beckendorf.
  • Hard Work Hardly Works: For all the combat training they go through at Camp, Silena's not that great in a fight. Attributed to her being a daughter of Aphrodite.
  • Heroic Sacrifice: As mentioned, she sacrificed her life to trick the Ares cabin.
  • History Repeats: Fulfills the Patroclus role in the Trojan war. See Achilles in His Tent above for elaboration.
  • Human Mom Non Human Dad: Inverted; her mother is a goddess while her father is a mortal.
  • Karma Houdini Warranty: She was The Mole, but didn't tell anyone that Luke had blackmailed her. Then her boyfriend Beckendorf dies protecting the camp. Silena dies making up for being The Mole by posing as Clarisse despite not being a good fighter. And at least some campers refuse to see her as a hero considering she nearly got everyone killed.
  • Killed Mid-Sentence: Manages to eke out "See Charlie..." just before dying.
  • Lovable Alpha Bitch: Head counselor of the Aphrodite cabin and daughter of a rich man, yet Percy describes her as one of the nicest Aphrodite girls.
  • Love Freak: Comes with being a daughter of the love goddess.
  • Maybe Magic, Maybe Mundane: When she says Luke charmed her, it's unclear if he actually seduced her or cast a spell on her to be the The Mole. Given she was wearing a bracelet that she shakes off when dying, there are hints towards the latter.
  • Meaningful Name: Although it literally translates as "handsome gaze", her name means "regarded highly".
  • The Mole: She was the reason Kronos knew exactly what Camp Half-Blood was planning: she had been charmed by Luke into telling him everything.
  • Neat Freak: The Aphrodite cabin is always spotless.
  • Nice Girl: Nice and amiable to everyone, in contrast to the other Aphrodite girls.
  • Odd Friendship: With Clarisse.
  • Official Couple: With Beckendorf.
  • Redemption Equals Death: Zig-Zagged. She dies and is remembered as a hero, despite being The Mole the whole time. Except her replacement counselors mention that she was a failure for that reason.
  • Tomboy and Girly Girl: The girly girl to Clarisse's tomboy.

    Valentina Diaz 
A daughter of Aphrodite.
  • Dreadful Musician: In her hands a clarinet, sounds like a whimpering dog.
  • Meaningful Name: Daughter of Aphrodite and has a name one letter away from Valentine.

Cabin 11 (Hermes)

    In General 

  • Ragtag Bunch of Misfits: This cabin contains all the campers who are undetermined or children of minor gods, as well as the actual children of Hermes.
  • Trash of the Titans: The Hermes cabin is always a mess, which doesn't do them any favors when it comes to cabin inspection.

    Cecil Markowitz 
A son of Hermes. He's missing at the time of The Hidden Oracle.

    Chris Rodriguez 

Played by: Grey Damon

Son of Hermes and boyfriend of Clarisse. He's introduced as working on Luke's side and having gone insane when he went on a mission into the Labyrinth, but Dionysus heals him at the end of Battle of the Labyrinth.

Other Campers

A wheelchair-using demigod of unknown parentage. He first appears in The Tower of Nero.

    Chiara Benvenuti 
"C'è un karpos!"
Daughter of Tyche.

    Damien White 
Son of Nemesis.

    Paolo Montes

Son of Hebe.

  • Good Thing You Can Heal: Or, in this case, adjust to having reattached limbs.
  • Informed Attractiveness: When he's not bleeding out from dismemberment, according to Apollo.
  • Language Barrier: Claims to be able to understand English fluently, but only speaks Portuguese, which none of the others understand, except apparently Nico.

Surrounding Woods

    Grove of Dodona 
A grove of oaks planted by Rhea that give prophecies. Burned down in ancient times, it has since regrown in the woods surrounding Camp Half-Blood.
  • Mad Oracle: They're not all there, often talking about irrelevant or nonsensical things.
  • Voice of the Legion: When they focus and give a specific prophecy they all speak at once.
  • Wise Tree: When they aren't babbling incoherently.

A nest of giant ants.

    Pete and Paulie 
A pair of palikos, spirits of geysers and sacred oaths, who live in the woods.
  • Ambiguously Gay: Pete refers to Paulie as his partner, but the exact meaning is unclear. Given how close they seem, it could easily be in a romantic sense.
  • Making a Splash: As geyser spirits, with the bonus that it's hot enough to broil their foes alive.
  • Monochromatic Eyes: Their eyes are solid white.

Other Residents

Percy's trusty horse, who he rescued from slavery in Luke's ship. Percy can talk with him because he's a son of Poseidon, who made horses.

"The gods have placed ancient magic on this island to keep me here. A hero can leave. I cannot."
Atlas's daughter, who was punished after the first Titan War by being imprisoned on the island Ogygia. She looks after Percy when he washes up onto her island, and gives him moonlace before he leaves. She has become somewhat embittered and angry after the gods bailed on their promise to release her from her isolation. She was occasionally visited by demigods who couldn't leave until she fell in love with them. The most recent of these was Leo Valdez, who has rescued her.

  • Adaptational Heroism: She's much kinder than she is in the original mythology, where she's a seductress who kept Odysseus prisoner for years.
  • Amicable Exes: Not that they have ever actually formed a relationship, but she is very civil to Percy here, even when she flat-out hates him in the previous series. She even manages to give him a peck to the cheek as a parting gift. Towards Apollo, on other hand...
    • Justified, as Percy did petition for Calypso's release, and Leo probably told her how Percy felt guilty for not doing enough to help her.
  • And I Must Scream: Has been trapped on a island for 5,000 years with no company. The only visitors she ever mentions? Hermes, Hephaestus, Odysseus, Sir Francis Drake, Percy Jackson and the unmentioned one she is telling this to: Leo Valdez. Odysseus was around 1000BCE, Drake the late 1500sCE, Percy and Leo in the early 2000s. Yeah.
  • And the Adventure Continues: The very last scene of Heroes of Olympus is her and Leo departing Ogygia for parts unknown. Subverted when they arrive at Camp Half-Blood in The Trials of Apollo.
  • Ascended Extra: She's officially joining Apollo's Trial Team at the end of the first book. Compare to her previous two appearances in the last two quintets, where she serves only in romantic sidequests.
  • Broken Bird: This side of her is explored more than in the previous series; as she's clearly quite bitter after centuries of being alone and under a curse, even after the gods promised to free her from it.
  • Brought Down to Normal: Leaving Ogygia caused her to lose her immortality and magical powers.
    • Her magic begins to return in The Dark Prophecy.
  • Curse: Indirectly inflicts one on Annabeth in The House of Hades due to her jealousy over Percy leaving her for Annabeth and bitterness over him not keeping his promise to get the gods to set her free.
  • I Lied: Has this inflicted on her between the first and second series, since no one has freed her even though Percy ordered her release.
  • Irony: She curses the gods for sending her someone who she hates, and for not releasing her from her punishment despite their promises to do so. In fact it's implied the Gods arranged for Leo to free her, using the nature of her curse to ensure she winds up with someone she loves. It's even possible they couldn't free her themselves, due to the nature of Gods in this series. But that's what they have heroes for.
  • "Leave Your Quest" Test: The island of Ogygia, which is basically a paradise meant to trap heroes.
  • Lotus-Eater Machine: Discussed, when she says that "time flows differently" on Ogygia.
  • Mad Scientist's Beautiful Daughter: She's the daughter of Atlas and supported her father in the first war, which is why she's in exile on an island in the first place.
  • Mayfly–December Romance: Once, she's the December to Leo's Mayfly. But not anymore.
  • Misunderstood Loner with a Heart of Gold: Is kind-hearted and empathetic despite the lack of company.
  • Nice Girl: Is depicted as genuinely caring and kind, despite her awful punishment. The sequel series plays around with this set-up.
  • Noodle Incident: Apollo once tried to prevent her petition to get an early release from Ogygia because of...some drama. She presently doesn't like him because of this, among other reasons.
  • Official Couple: With Leo.
  • Really 700 Years Old: She appears to be fifteen or sixteen, although she's been around for millennia. Though she does lose her immortality permanently.
  • Satellite Love Interest: In the first series, she has basically no characterization besides being a Nice Girl who falls in love with Percy. Averted in the second and third series, where her personality and desires are explored much more.
  • Significant Wardrobe Shift: For over 5,000 years her fashion sense didn't change from wearing an ancient Greek-style white robe with a golden belt. After Leo Valdez shows up on her island she switches to jeans and red t-shirts because she realised how much more practical they were.
  • Smite Me, O Mighty Smiter: Starts doing this once Leo lands on her island, ranting about how the gods are apparently trying to make her suffer even more by sending someone who can't leave and she hates, rather than one who can (and does) but she loves. She may have engaged in this before then too. She isn't happy that the gods haven't set her free yet.
  • Slap-Slap-Kiss: With Leo Valdez.
  • Took a Level in Jerkass: Downplayed from her previous characterization, with the harsh Tsundere tendencies she displays initially.
  • Tsundere: Turns out to be a Type B. From what's seen of her in the previous series, she's a sweet and helpful Nice Girl, but she shows a cranky side towards Leo. Weirdly enough, Leo is the first person to fall in love with her.
  • Unrequited Tragic Maiden: Enforced. She's doomed to always fall in love with the hero who washes up on her island, but never have her affections returned, and the heroes cannot leave until she falls in love with them. It's finally subverted when she falls for Leo, who actually reciprocates her feelings.
  • Walking the Earth: The Blood of Olympus ends with her and Leo flying off on Festus together to see the world.
  • What Could Have Been: In-universe. After turning down her offer to stay with her on the island, Percy wonders what would have happened if he'd accepted it. His narration even calls her his biggest what-if.
  • Wrench Wench: On Ogygia, her divine strength and intuition means she can outpace Leo when it comes to working on constructing mechanical devices. She's good enough that Leo suggests they should open an Auto Repair Shop together when they leave Ogygia.

A dragon automaton and returning character from The Bronze Dragon, an ancillary story from the previous series. At the beginning of the series, he's gone haywire as a result of Beckendorf's death. Currently the figurehead and AI of the Argo II.

  • A.I. Is a Crapshoot: In his first two appearances, he's crazed and violent as a result of his damaged control disk. This problem is mostly remedied by Leo later on.
  • Breath Weapon: As one might have guessed, he breathes fire.
  • Fluffy the Terrible: A giant, firebreathing, flying dragon automaton...named, what is essentially, "Happy." Lampshaded by Jason.
    Jason: You named him Festus? You know that in Latin, 'festus' means 'happy'? You want us to ride off to save the world on Happy the Dragon?
  • Gem Tissue: Has ruby eyes.
  • Grew Beyond Their Programming: Piper's charmspeak managed to bump him up to full sentience.
  • Impossibly Compact Folding: Can somehow compact himself into a box the size of a suitcase for ease of transport. Unfortunately, it's still just as heavy as a sixty-foot-long bronze mecha-dragon... which is why it also has a carry-on handle and wheels.
  • It Can Think: When Cabin 9 was trying to capture him, they found he was more intelligent than initially assumed.
  • Living Ship: Seems sentient. Piper manages to temporarily charmspeak Festus's head into proper sentience in The House of Hades, after which the crew notes he seems more alive.
  • Only Mostly Dead: Sliced to pieces by lasers when he crash-lands on Midas's lawn, but this doesn't stop Leo from having Hephaestus take his head back to Camp Half-Blood so he cam become the Argo II's living figurehead.
  • Our Dragons Are Different: A robotic one.
  • Red Eyes, Take Warning: When first introduced, he was an uncontrollable mechanical monstrosity with glowing red eyes. His eyes are still red, but the rest no longer applies.
  • Shock and Awe: He can electrify his outer plating to dislodge enemies.
  • Team Pet: Jason, Piper, and Leo see him as one.
  • This Is a Drill: His teeth are drill bits.
  • Transforming Mecha: Can fold into a suitcase-sized box for convenience. And the framework of the Argo II.

    Mrs. O'Leary
Quintus's dog. Later becomes Percy's after Quintus/Daedalus dies.

  • Action Pet: Loves to give licks and kisses to those she cares about. She's also bigger than a tank and can barrel through monsters and demigods alike and went to take on the Drakon before injuries forced her to retreat.
  • Big Friendly Dog: Emphasis on big. She's at least the size of an SUV.
  • Dark Is Not Evil: She's a hellhound and also a Big Friendly Dog.
  • Face of a Thug: She's definitely a Big Friendly Dog, but she looks just like any other hellhound. Percy actually hesitates during the Battle of Manhattan while fighting a hellhound, forcing him to remind himself that the hellhound he was fighting was a killing machine and not Mrs. O'Leary.
  • Fluffy the Terrible: A hellhound that can chew apart bronze constructs with her teeth and play with shields designed to protect against the attacks of other monsters the way most would play with a Frisbee. She's also named "Mrs. O'Leary."
  • Glamour: Like most other supernatural things in the Riordan books, the Mist hides her from mortal eyes. As a result, she looks like a large poodle to Percy's schoolmates rather than a hulking beast the size of a tank.
  • Hellhound: Is one.
  • Just Whistle: In the fourth book, she can be summoned by a whistle made of Stygian Ice. But It Only Works Once, since said whistle shattered after a single use.
  • Mighty Roar: Her barks are louder than artillery cannons.
  • Pet Monstrosity: To Quintus and later Percy.
  • Thinking Up Portals: Like the children of Hades, Ms. O'Leary can open up portals to Shadow Travel across vast distances, but doing so tires her out.

A dragon bought by Chiron to protect the Golden Fleece.
  • Breath Weapon: He's never been seen to use it, but the smoke he produces indicates fire.
  • MacGuffin Guardian: For the Golden Fleece.
  • Snakes Are Sinister: He's serpentine in appearance and quite dangerous. Averted if he knows you, as he'll let campers walk right up to him.
  • Stronger with Age: He's fairly young, less than a decade old, but he's constantly growing.

Alternative Title(s): The Camp Half Blood Series Greek Demigods


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