Demigods: Main Characters (Percy Jackson) | Camp Half-Blood | Camp Jupiter
Gods: Major Gods | Minor Gods | Other Servants
Villains: Forces of Kronos | Forces of Gaia | Forces of Triumvirate Holdings
Others: Nature Spirits | Mortals | Monsters | Other | Demigods & Magicians
The various monsters seen in The Camp Half-Blood Series (Percy Jackson and the Olympians, The Heroes of Olympus and The Trials of Apollo) and companions like The Demigod Files and The Demigod Diaries. Please note that not all monsters are evil. For the full list of characters, click here.
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Gigantes
General
The giant children of Gaea and Tartarus, each one was meant to destroy and replace a specific god. They appear in The Heroes of Olympus, and most can be found here.
Damasen
The Giant counterpart to Ares. As Ares is warlike and bloodthirsty, Damasen is peace-loving and gentle. This put him at odds with the rest of his family, who exiled him in Tartarus. By the time our heroes encounter him, he has become bitter, but they find ways around that.
- Arch-Enemy: He was designed to be one to Ares, but this backfired because, by being the opposite of a violent war god, Damasen is by default a pacifist without desire to actually fight.
- Antagonistic Offspring: To Gaea and Tartarus, whose crusade he refused to take part in.
- The Beastmaster: He tames and rides the Drakon at the end of the fourth book. It certainly wasn't on good terms with him before, so it's likely he was exerting some kind of magical control over it... or it might have just been as eager to break their endless cycle of fighting as Damasen was.
- Big Damn Heroes: Appears during the fight with Tartarus to help Bob hold him off.
- Cynicism Catalyst: Inverted. Seeing the formerly brutal Iapetus rebel against Gaea convinced him that he, too, could change his fate.
- Dragon Rider: During his Big Damn Heroes moment, he rides on the back of the same drakon he fought for thousands of years.
- The Exile: He was trapped in Tartarus for eternity after a rather drastic falling out with the other Giants.
- Fate Worse than Death: He was exiled in Tartarus for thousands and thousands of years, forever locked in combat with the Maeonian Drakon.
- Heroic Sacrifice: He takes on Tartarus to buy Annabeth and Percy time to escape.
- Let's Get Dangerous!: He delivers an awesome speech to this effect whilst battling Tartarus.Damasen: Father, you wished for a more worthy opponent? I am one of the Giants you are so proud of. You wished me to be more warlike? Perhaps I will start by destroying you!
- Meaningful Appearance: Like the other Giants, but instead of trophies of war, he has grass, leaves and flowers braided in it, reflecting his peaceful nature.
- The Medic: He cures Percy of his gorgon-blood poisoning.
- Nice Guy: Because Ares was such a Blood Knight, Damasen ended up being this. His temperament seems to have soured somewhat in the present day, but really, can you blame him?
- No Good Deed Goes Unpunished: The other Giants exiled him to Tartarus for ending the Drakon's rampage through Maeonia (present-day Turkey).
- Red Is Heroic: He has rust-colored hair and cherry-red skin, and is the most morally upright and benevolent of the Giants.
- Token Good Teammate: To the Giants; he's the only one of their kind to have no interest in war and conquest.
- You Can't Fight Fate: He initially believes this, but Percy and Annabeth change his mind.
- You Shall Not Pass!: He does this against Tartarus, allowing Percy and Annabeth to escape through the Doors of Death.
Cyclopes
General
A cyclops (plural cyclopes) is a one eyed giant. The first ones were born from Gaea and Ouranos, though the majority of them are children of Poseidon. Many cyclopes work for the gods, either by being in their army or the forges of Hephaestus. The rest prefer to prey on wandering Demigods.
- Beware the Silly Ones: Their stupidity can often end up being pretty funny, but they're still dangerous, man-eating monsters.
- Cyclops: Of course. Mostly (but not always) of the Classical Cyclops variety.
- Dumb Muscle: Unless they're working with metal, they are this.
- Genius Ditz: They excellent with metal, in fact the first three cyclopes made the big three's symbols of power.
- Gonk: Most people consider them pretty ugly.
- Resurrective Immortality: A standard for monsters, killing them just sends them to Tartarus were they'll just reform.
- Super-Senses: Super hearing, it's often used in tandem with Voice Changeling, in order to help draw in unsuspecting demigods.
- Super-Strength: All of them have it to some degree.
- Voice Changeling: All cyclops have this power and it's creepy.
Tyson
Poseidon's cyclops son. His tropes can be found here.
Polyphemus
The infamous cyclops that was blinded by Odysseus from The Odyssey. At some point he acquired the Golden Fleece, which attracted numerous satyrs to his Island and their demise. The heroes Percy, Annabeth, Grover and Clarisse eventually went on a quest to steal the fleece from Polyphemus to save Thalia's Tree and all of Camp Half-Blood.
- Berserk Button: The mention of "Nobody".
- Blind Mistake: Mistakes Grover for a female cyclops and tries to marry him.
- Classical Cyclops: THE Classical Cyclops (well, in Greek Mythology that is).
- Evil Cripple: Tricks numerous satyrs into coming to his Island to eat them and later on tries to eat the heroes of the story. He also tries to force Clarisse into marrying him. He also takes abuses the mercy Percy gave him.
- Handicapped Badass: Fights the heroes of the story and almost won.
- Hypocrite: Calls Percy, Tyson, and the others "fleece-stealers" when they try to claim the Golden Fleece from his island. Percy retorts that he stole the fleece from the demigods first, his intentions merely to lure satyrs to their deaths.
- Fat Bastard: Very fat from all the random things he's eaten - including humans and satyrs.
- Pride: Arrogantly believes that Poseidon will help him kill Percy due to being his son.
- Temporary Blindness: Zig Zagged; sometimes he appears to be blind, but at other times he can (abit with much difficulty).
Ma Gasket
A Hyperborean cyclops who is part of Gaea's army. Her tropes can be found here.
Sump and Torque
Ma Gasket's cyclops children. Their tropes can be found here.
Gorgons
General
Three sisters that were turned into hideous monsters by the goddess Athena after she caught Medusa having a affair with the god Poseidon.
- Fangs Are Evil: Both Euryale and Stheno are described as having tusks. Presumably Medusa has them too, but for obvious reasons no one looks at her face.
- Healing Serpent: It's stated that blood from their right side can heal anything, though only the blood of Euryale and Stheno are used and gained as spoils of war as opposed to Medusa.
- Medusa: Sort of a Double Subversion. Only Medusa can turn people to stone, the other gorgons can't.
- Snake People: As gorgons they are this.
- Wolverine Claws: All three of them have talons and know how to use them.
Medusa
Played by: Uma Thurman (films), Jessica Parker Kennedy (TV series)
- Adaptational Attractiveness: Due to Rick Riordan's preference of ability over appearance, Medusa is hardly the old and ugly crone she is supposed to be in the Disney Plus series, being portrayed by the young and attractive Jessica Parker Kennedy. The same applies to Uma Thurman, who played her in the Fox adaptation.
- Adaptational Villainy: The book version was a kind individual who just happens to have a few screws loose. The film version is a spiteful Femme Fatale with a side of Woman Scorned.
- Affably Evil: In the books, she's actually quite kind and reasonable as far as monsters usually go. It's left ambiguous how much of it is genuine and how much is an act for her victims to get their guard down, since she clearly has a soft spot for Percy due to his relation to Poseidon and has a rather understandable hatred of Annabeth due to her relation to Athena.
- I Banged Your Mom: In the movie, she bemusedly states she "used to date [Percy's] daddy" while trying to kill him.
- Love Father, Love Son: Carries enough of a torch for Poseidon in the books that she wants to keep Percy as her most prized statue.
- Medusa: The only gorgon to actually play this straight much like in the actually myth. She is the Trope Namer after all.
- Mercy Kill: She tells Percy the hardships and pain he'll face on his quest are such that it would much kinder to just turn him to stone here and now and remain her most prized statue.
- Parental Favoritism: Implied by Euryale.Euryale: "Heroes! They always bring that up, just like our mother! 'Why can't you turn people to stone? Your sister can turn people to stone.' Well, I'm sorry to disappoint you, boy (Percy)! That was Medusa's curse alone. She was the most hideous one in the family. She got all the luck!"
- Sins of the Father: Hates Athena so much she states she would shatter Annabeth's statue solely to spite her.
- Woman Scorned: In the film, planning to kill Percy just to spite Poseidon.
- Yandere: In the books, towards Poseidon.
Euryale and Stheno
Medusa's elder sisters and fellow gorgons. Unlike her, they are immortal, but lack the ability to turn things to stone through eye contact. First seen hunting Percy, they later join up with Polybotes's army to attack New Rome. Their tropes can be found here.
Automatons
General
Technically not really monsters, but robots only more developed (likely due to magic). Despite this they are often treated as monsters due to how dangerous they can become if they are broken or activated incorrectly. Not to mention many were built for combat. They can also be used as vessels for souls and other bodiless spirits, such as Daedalus and Eidolons have shown. Many were built by Hephaestus.
- Annoying Arrows: Arrows rarely if ever affect them since they're made out of metal.
- Clockwork Creature: Those described in more detailed are described as such, possible meaning that they all are.
- Nigh-Invulnerability: Normal attacks rarely work on them since they're made of metal.
- Steampunk: In combination with Clockwork Creatures above, though instead of a Victorian flavor it's usually Greek or Roman if not the society it was built in.
Talos Prototype
The automaton protector of Hephaestus' junkyard. Its tropes can be found here.
Hank and Chuck
A pair of automatons shaped like angels that have spent the past few decades posing as statues on the Hoover Dam. Their tropes can be found here.
Chyrseae Celedons
Backup singers made by Hephaestus for Apollo. Their tropes can be found here. here.
Colossus Nerosus
A titanic statue of Nero which he sends to destroy Camp Half-Blood. Its tropes can be found here.
Empousai
General
Formed from animal, bronze and ghosts with the use of dark magic. They feed on the blood of young men and they posses flaming hair, white skin, red eyes, fangs, one prosthetic bronze leg and one donkey leg. They claim to be the basis for the vampire legend.
- Charm Person: According to Annabeth, empousai are able to charmspeak.
- Chrome Champion: But only for one of their legs, which is bronze.
- Cute Monster Girl: Thanks to their Shapeshifting.
- Face of an Angel, Mind of a Demon: When disguised as human.
- Fangs Are Evil: Fittingly since they drink blood.
- Flaming Hair: All of them have it.
- Glamour Failure: Percy notes they smell like roses and horse fur even when disguised.
- Mix-and-Match Critters: They all have a single donkey leg.
- One-Gender Race: All of them are female.
- Our Vampires Are Different: Often compared to or even openly called vampires, which makes sense since they're the basis for the myth.
- Red Eyes, Take Warning: All of them have red eyes and are incredibly dangerous.
- Servant Race: To Hecate, their creator. This trope was however later on subverted in The House Of Hades, ironically by Kelli, the empousai that first appeared in The Battle Of The Labyrinth who declared her race as this.
- Older Than They Look: Many are over a thousand years old, but appear to be teenagers or young women.
- Shapeshifting/Master of Disguise: They often assume the form of a attractive girls/women. This seems to be the extent to this ability.
- To Serve Man: The feed on the blood of men.
Kelli
An empousai who serves Kronos first and Luke second. Trainer of her sister Tammi and a senior empousia, being over a thousand years old. Later on revealed to have actually been serving Gaea, the serving Kronos was just a means to help wake Gaea. She was later on seen leading a group of other empousai through Tartarus. Her tropes can be found here.
Tammi
A blonde empousa who attacked Percy while seducing and feeding on students. She was Kelli's student, but unlike her mentor she has yet to reform after her death. Her tropes can be found here.
Serephone
One of many empousai that were following Kelli in Tartarus to get to the Doors Of Death in order to get back to the mortal world. She was eventually killed by Kelli when she tried to take control of their group after finding out that Hecate sided with the Olympians.
- The Older Immortal: She refers to Kelli as "young one", despite Kelli being at least a thousand years old.
- Undying Loyalty: To Hecate; she refuses to remain on the Giants' side when she finds out Hecate is siding with Olympus, and fights Kelli to the death over this.
- We Hardly Knew Ye: She has a total of six lines before she's killed.
Scythian Dracaneae
In general
Scythian dracanae (singular dracaena) are women with a serpent's body in place of each leg.
- Cute Monster Girl: When you get past the slit pupils and snake tail legs they are in fact rather beautiful.
- Mooks: Their role in Kronos's army.
- Silly Walk: It comes with having snakes for legs. They move like they're perpetually on skis.
- Sssssnake Talk: They talk like this. One is even named Sssssarah which is explicitly spelled with 5 s-es.
Queen Sess
Queen of the Scythian Dracnae. Her tropes can be found here.
Sssssarah
A Scythian Dracaena formerly enslaved by The New Hercules. After being freed she joined Apollo and the others who defended The Waystation.
- Balloon Belly: Naturally, for someone half-snake she gets one after swallowing a barbarian whole.
- Burp of Finality: While trying to deny that she ate a barbarian, she burps in Apollo’s face, then playfully admits that "perhapsss" she did.
- Made a Slave: Like the others found in the arena, she was enslaved to be a gladiator.
- Swallowed Whole: The swallower in this case, as appropriate for someone part snake. She aprently eats all her food whole and even eats barbarians whole.
- Token Heroic Orc: She is the only dracaena in the series that doesn't seem to be evil. She even remains at the Waystation after defending it from Commodus.
Hellhounds
Hellhounds
Large monster dogs from The Underworld. They are highly feared by half-bloods, but are relatively safe for children of Hades/Pluto.
- Adaptational Species Change: In the books, they are said to resemble giant mastiffs. In the films, they instead resemble gargoyles with grayish lion-like faces and fur, and in the graphic novels, they resemble wolves. The graphic novel change also applies to Mrs. O'Leary.
- Canis Major: Any were between that of a grizzly bear to a garbage truck.
- Glowing Eyes of Doom: Their eyes are stated to glow.
- Hellhound: What do you expect, they are hellhounds.
- Mooks: In Kronos's army.
- Red Eyes, Take Warning: All have red eyes.
- Shadow Walker: Called shadow travel. They can end up tired with over exertion and will need to rest afterwards.
Mrs. O'Leary
A friendly hellhound owned by Daedalus (and later Percy) who resides in Camp Half-Blood. Her tropes can be found here.
Tauri Sylvestres — unmarked spoilers
Tauri Sylvestres
Red-furred, blue-eyed cattle twice the size of a normal bovine with indestructible hide. Natural enemies of the Troglodytes. Also known as Forest Bulls.
- Arch-Enemy: They're a species-wide one to the troglodytes.
- Brutish Bulls: They are vicious bovines.
- Creepy Blue Eyes: They have blue eyes and are malevolent creatures.
- Nigh-Invulnerability: Their hide is indestructible and no weapon can pierce through it. The only way to kill them is to trap them in a pit, where they would choke to death with their own anger.
- Red Is Violent: They excel at charging their victims down.
- Riddle for the Ages: How they, a species of angry, smart bulls with impenetrable hides got a species of underground hat-loving frog men as an Arch-Enemy goes unexplained and is even questioned in-universe.
Troglodytes — unmarked spoilers
Troglodytes
Cave-dwelling frog-like humanoids who enjoy eating lizards and other small reptiles. Their enemies are the Tauri Sylvestres. They play a crucial role in The Tower of Nero.
- Adaptational Ugliness: In Roman accounts, the trogs are described as a tribe of people, indicating they are human, or at least part of the Homo genus. Here, they're described as looking amphibian.
- Beyond the Impossible: They somehow make tents out of the hides of tauri silvestres, which are described as having impenetrable skin.
- Fast Tunnelling: They can burrow through the hardest of materials, and are even said to have the ability to dig into Tartarus itself.
- Frog Men: Are described as looking "vaguely froglike" when first seen, though Screech-Bling's official artwork generalizes them to straight-up looking like anthropomorphic amphibians.
- Glowing Flora: The caverns where they dwell are lit up by bioluminescent mushrooms.
- The Hilarity of Hats: They consider only hat-wearing species to be civilized, and insist that their human and demigod guests put one on. This segues into a lampshaded Take That! to the New York Mets and an instance of Lampshade Wearing.
- In-Series Nickname: They're often called "trogs", even when referring to themselves.
- It's All About Me: As a species, they do not care for what goes on above the surface that does not affect their species. Rachel exploits this to help convince them to fight against Nero by mentioning that their destiny would be controlled by Python, a giant reptile, i.e. their primary food source. It isn't the main reason the questers list why they should help them defeat Nero, but it probably helped.
- Pet the Dog:
- Apollo's heartfelt ukulele song about what the demigods have lost and what's at stake moves them to tears, though Screech-Bling says it was "horrible" to hear. Apollo notes that previously he had confused "disable" with "eat", so he may have meant to say "wonderful".
- Despite being pissed at Nico and co. for accidentally leading the tauri silvestres to their home, they still follow the plan to disable the Greek fire vats and even help Camp Half-Blood assault Nero's tower.
- They remove all of their hats as a form of respect to Apollo as he moves underground to face Python, when all the odds are against him.
- Riddle for the Ages: How they, a hat-loving froglike species that lives underground got angry impenetrable bulls as an Arch-Enemy goes unexplained and is even questioned in-universe.
- The Sneaky Guy: They are capable of incredible stealth and manage to dismantle Nero's Greek fire catapults to stop him from destroying New York, among other things.
- Super-Speed: They are very fast and get people from deep underground to the surface of Midtown, Manhattan in a very short time.
- To Serve Man: They have no qualms against eating humans and demigods. They would much rather have skink, but it doesn't stop them from eyeing up human and demigod guests, other than perhaps a few exceptions.
- Trademark Favourite Food: They consider lizards a delicacy.
- Weakened by the Light: Living deep underground, they tend to avoid crust-dwellers and sunlight, though they still make use of other light sources for visibility.
Screech-Bling
The Chief Executive Officer of the Troglodytes.
- Gorgeous Period Dress: It is mentioned that he dresses like George Washington.
- Interspecies Friendship: He gets along surprisingly well with Nico and respects him.
- No Historical Figures Were Harmed: He models himself after George Washington.
Others
Antaeus
A red-skinned giant, son of Gaea and Poseidon, and master of an arena in the Labyrinth.
- Battle Trophy: His massive, publicly displayed pile of skulls from all those he's slaughtered in Poseidon's name.
- Cain and Abel: He is one of Percy's half-brothers, as they're both sons of Poseidon. The young demigod ends up fighting and killing him.
- Healing Factor: He boasts that he never loses a fight because of Gaea healing him, making him impossible to kill.
- Logical Weakness: His Healing Factor works by summoning dirt from the earth to heal his wounds, but it doesn't work when he's not touching the ground. Percy exploits it by getting him tangled up in chains above the arena and stabbing him until he dissolves into nothing.
- Misaimed Fandom: In-universe Poseidon expresses disapproval to Percy the killing Antaeus has done in his name.
- Repulsive Ringmaster: He gets entertainment from watching monsters and half-bloods slaughter each other in the arena.
- The Tooth Hurts: His teeth are etched in wave patterns. Percy comments that it must make brushing after meals a real pain.
Typhon
- Arch-Enemy: As the father of all monsters, Hermes explains that Typhon is the gravest threat the Olympians ever faced and got closer to destroying Olympus than anybody else.
- The Dreaded: He's feared by the Olympians more than any other threat, even Kronos.
- Eldritch Abomination: More so than anyone else. His body is constantly shifting between every type of monster and new ones and looking at him for too long would drive a demigod insane.
- Father Of A Thousand Young: He fathered nearly all of the major monsters.
- Greater-Scope Villain: The progenitor of the monsters that hound the characters, from ancient times up until the present. While villains like Kronos and Gaia play the role of The Chessmaster and enact long term schemes to rise back to power, Typhon has not been shown to have that level of cunning. Or any cunning at all. He is merely a force of completely alien destruction and relies on his sheer strength to tear through his enemies.
- The Juggernaut: It took the combined might of most of the major Olympians battling him for weeks and the last minute arrival of Poseidon and his own army to bring him down. When he first showed up to battle the Olympians in ancient times, every god except Zeus ran at the sight of him.
- Laser-Guided Tyke-Bomb: He was created to avenge the Titans' defeat and bring down the Olympians.
Echidna
Played by: Suzanne Cryer
The daughter of Gaea and Tartarus and the wife of Typhon, also referred to as the "Mother of Monsters." Zeus allowed Echidna and her children to live on Earth as challenges to the demigod heroes.
- Adaptational Attractiveness: Due to Rick Riordan's preference of
Ability over Appearance, Echidna's human disguise is hardly the rotund woman we see in the book and the graphic novels. - Adapted Out: Doesn't appear in the film.
- Berserk Button: Bring up the fact that she's the namesake of an Australian anteater at your own risk.Percy: Isn't that a kind of anteater?
Echidna: I hate it when people say that! I hate Australia! Naming that ridiculous animal after me. For that, Percy Jackson, my son shall destroy you! - Fat Bastard: Her human disguise is a plus-sized woman.
- Morphic Resonance: Even in human form, she still has a reptilian tongue and slitted eyes.
Chimera
Played by: Baby (as a chihuahua)
One of Echidna's children, disguised as a chihuahua.- Adapted Out: Doesn't appear in the film.
- Gender Flip: Is female in the original myths ('Chimera' being ancient Greek for "she-goat"), but male in the books. The Disney+ series makes the Chimera female, bringing it more in line with its mythological counterpart.
- Mister Muffykins: In chihuahua form, complete with the rhinestone collar. He still has the collar in his true form.
- Shapeshifting: Can transform into a chihuahua.
- Poisonous Person: His snake-headed tail secretes deadly venom, and poisons Percy this way.
