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1[[WMG:[[center: [- ''Literature/TheCampHalfBloodSeries'' '''[[Characters/TheCampHalfBloodSeries Main Character Index]]'''\
2'''Demigods:''' [[Characters/TheCampHalfBloodSeriesMainCharacters Main Characters]] ([[Characters/TheCampHalfBloodSeriesPercyJackson Percy Jackson]]) | [[Characters/TheCampHalfBloodSeriesCampHalfBlood Camp Half-Blood]] | [[Characters/TheCampHalfBloodSeriesCampJupiter Camp Jupiter]]\
3'''Gods:''' [[Characters/TheCampHalfBloodSeriesMajorGods Major Gods]] | [[Characters/TheCampHalfBloodSeriesMinorGods Minor Gods]] | [[Characters/TheCampHalfBloodSeriesServantsOfTheGods Other Servants]]\
4'''Villains:''' '''Forces of Kronos''' | [[Characters/TheCampHalfBloodSeriesForcesOfGaia Forces of Gaia]] | [[Characters/TheCampHalfBloodSeriesTriumvirateHoldings Forces of Triumvirate Holdings]]\
5'''Others:''' [[Characters/TheCampHalfBloodSeriesNatureSpirits Nature Spirits]] | [[Characters/TheCampHalfBloodSeriesMortals Mortals]] | [[Characters/TheCampHalfBloodSeriesMonsters Monsters]] | [[Characters/TheCampHalfBloodSeriesOther Other]] | ''[[Characters/DemigodsAndMagicians Demigods and Magicians]]'']]-]]]
6
7The forces of Kronos of the ''Literature/PercyJacksonAndTheOlympians'' series and companions like ''Literature/TheDemigodFiles'' and ''Literature/TheDemigodDiaries''. For the full list of characters, click [[Characters/TheCampHalfBloodSeries here.]]
8
9[[foldercontrol]]
10
11[[folder:Kronos/Saturn]]
12!!!'''Played by''': Creator/RobertKnepper (films), Nick Boraine (Disney+ series)
13[[quoteright:310:https://static.tvtropes.org/pmwiki/pub/images/kronos.jpg]]
14
15The King of the Titans and suitably the most powerful. He has domain over time and harvest. He is also Percy Jackson's malevolent grandfather and arch nemesis.
16
17----
18* AbusiveParents: He literally ate his children as soon as they were born because it was foretold that he was destined to be overcome by his own sons.
19* AdaptationalBadass: Chiron warns that if Kronos manages to get back to full power, he will be so strong that Typhon would be akin to a school yard bully by comparison. While the mythological Kronos was certainly formidable, Typhon is usually considered a greater threat.
20* AdaptationalVillainy:
21** His Roman aspect Saturn. While the historical Romans had a very positive view of him, believing him to be a wise ruler who brought mankind a golden age, Camp Jupiter indicates that he isn't viewed much better than his Greek counterpart here.
22** In general; Greek myths described him ruling benevolently over humanity in a golden age, and who only turned evil later in his life. In these books, however, the whole "golden age" was just [[VillainWithGoodPublicity Kronos' propaganda]] and he really used humans as [[ImAHumanitarian food]] and entertainment.
23* AncientEvil: Thousands of years old, in fact.
24* AndIMustScream: He literally ''cannot'' die. The first time, he was chopped into bits and pitched into Tartarus. The second time, [[spoiler:his consciousness exploded and was spread so thinly across the world that there's little hope of it reassembling]].
25* ArchEnemy: The leader of the Titans and the overarching threat of the entire series as a whole, tearing apart the lives of multiple demigods in the grand scheme of things. Through he's the nemesis of far too many to list, he takes a particular interest in [[TheHero Percy Jackson]], his descendant from Poseidon's side.
26* ArchnemesisDad: To all of the 12 Olympians, particularly the Big Three themselves; Zeus, Poseidon, and Hades.
27* AsskickingLeadsToLeadership: Became King of the Titans through being the most powerful, being the one who killed his father in the original mythology.
28* BatmanGambit: Allowing the Fleece to be returned to Camp Half-Blood so [[spoiler:Thalia could be brought back to life, and he could count on her FatalFlaw to sway her to his side]] so he could have a chance to control the Great Prophecy. It fails.
29* BigBad: Of the Literature/PercyJacksonAndTheOlympians series. His goal is to be resurrected, and the demigods and gods have to stop him because it would mean the fall of civilization.
30* BigNo: Lets one lose when [[spoiler:he's finally defeated]].
31* TheChessmaster: Manipulates people and events to further his goal of reforming and taking over the world.
32* CompleteImmortality: Like most divine beings in the series, Kronos simply cannot die. Period. Not even cutting him into numerous pieces will truly do the trick. [[spoiler:That said, after his essence gets scattered across the world, other characters theorize that he might never regain consciousness, let alone physcial body.]]
33* CompositeCharacter: The book series makes the common mistake of morphing the Titan Cronus with the primordial god of time, Chronos. In the myths, they were two separate beings who did not share the same powers. [[OlderThanTheyThink This is at least forgivable, since there is evidence that the Cronus and Chronos were often conflated even by the ancient Greeks.]]
34* DemonicPossession: Because Kronos never fully recovers from being mutilated, he can come into being only by possessing someone.
35* EldritchAbomination: Described as such.
36* {{Expy}}: The book version of Kronos is an expy of Sauron from ''Literature/TheLordOfTheRings.'' Both characters are ancient evils defeated thousands of years before the main MythArc in a manner that left them severely weakened to the point that they could barely manifest in a physical form again. The main plot revolves around their return and the disastrous consequences of their potential victory, and when they are finally defeated they are left in a [[FateWorseThanDeath state]] ''beyond'' AndIMustScream.
37* FateWorseThanDeath: Chopped into tiny pieces and spends millennia in agony in Tartarus while remaining very much alive. [[spoiler:His second defeat is possibly even ''worse'', with his consciousness spread so thin he has next to zero chance of becoming a sentient being again]].
38* GruesomeGrandparent: As the father of Poseidon, Kronos is Percy's grandfather. An evil Titan that wants to destroy Western civilization is, understandably, not someone you'd want to have as a grandpa.
39* JumpedAtTheCall: Percy Jackson's Greek Gods says he was eager indeed when Gaea asked the Titans who will kill Ouranos.
40* KarmicDeath: The first time around. Given that this mythology version where Kronos chopped Ouranos into pieces rather than merely castrating him, Kronos suffers the exact same fate done with the exact same weapon he used.
41* LeanAndMean: His original body is described as being far less impressive physically than his fellow Titans, but even back then he had an evil gleam in his eyes and was the only Titan who willing stepped up to the task of killing Ouranos.
42* OurTitansAreDifferent: ''Percy Jackson's Greek Gods'' describes him as being nine feet tall in ancient times (apparently short for a titan). While trapped in Tartarus after his overthrow by Zeus, Kronos was able to speak to people in visions and dreams, tempting them to evil. This is how he was able to recruit Luke. He shows that in his imprisoned form he can take over people's bodies (but this is not an easy task for Kronos). Even while posessing a mortal's body he shows himself very capable in combat.
43* SadisticChoice: In the fifth book, Kronos frequently threatens to kill Percy's friends unless he surrenders to him.
44* SatanicArchetype: Kronos sits imprisoned in {{Hell}}[[note]](Tartarus was not only the afterlife of torment in Hellenic religion, but also a word [[https://en.wikipedia.org/wiki/Tartarus#New_Testament used in the New Testament for Hell]])[[/note]] by the gods, but was still able to influence the world above by tempting people via dreams and visions. He has command over Hell's demons[[note]](Percy refers to monsters as demons in ''The Titan's Curse'' when talking about the Princess Andromeda, and again near the start of ''The Last Olympian'')[[/note]] and is able to possess people as he does in the attack on Olympus.
45* SealedEvilInACan: Initially, his remains are just in a particularly creepy sarcophagus that gets stronger every time a demigod forsakes the Olympians and joins his side. [[spoiler:Later, Luke graduates to being his SoulJar]].
46* SinisterScythe: His signature weapon. It spends most of the series reforged into Luke's sword Backbiter before getting reforged back into its old scythe form. As ''The Last Olympian'' shows, what makes it so dangerous is that the scythe is a SoulCuttingBlade as Percy felt immense pain and deliriousness when merely grazed by the scythe. One hit from the scythe can "sever their soul from their body" with a single touch, according to the Telekhines.
47* StrongerSibling: Despite the Giants being [[InformedAttribute hyped off as being stronger than the Titans as a whole]], Kronos is easily Gaea's most dangerous, [[TheChessmaster cunning]] and capable child.
48* TimeMaster: Kronos seems particularly fond of slowing time around his opponents to a near stop. Percy Jackson's Greek Gods has Percy state that back when he was king of the titans, he liked to use his powers to ''speed up'' time for his victims, causing them to crumble to dust due to aging. (Notably, his powers do ''not'', in fact, include TimeTravel, despite being the Titan (and thus personification) of Time.)
49* WeCanRuleTogether: Offers this a bunch of times. Most of them are insincere.
50* XanatosGambit: A big one in the second book. He gets Luke to poison Thalia's tree, which protects Camp Half-Blood and can only be cured by the Golden Fleece. There are three possible outcomes for this plan, and all of them help Kronos in some way:
51** The heroes fail to find the Fleece. Then the barrier is gone and Kronos' forces are free to raid Camp Half-Blood, killing many of his enemies.
52** The heroes find the Fleece and then Luke steals it. Then he can use it to bring back Kronos, allowing him to destroy the Olympus and Western civilization.
53** The heroes find the Fleece and Luke fails to steal it, so they bring it to Camp Half-Blood and cure the tree. Then they also accidentally resurrect Thalia, daughter of Zeus and another possible subject of the prophecy and so a possible pawn for Kronos other than Percy, making Kronos' win more likely.
54*** [[spoiler:[[{{Subverted|Trope}} Thankfully]], the last intended outcome doesn't work out as Kronos had hoped for when Thalia willingly joins the Hunters of Artemis the day before her 16th birthday, essentially removing herself from the Great Prophecy. He apparently never comprehended the notion since he's known of her past distaste for the Hunters.]]
55* YellowEyesOfSneakiness: All the more identifiable considering that he possesses people to function. When he possesses [[spoiler:Luke]], for example, the latter's eyes turn from blue to gold.
56* YouHaveFailedMe: Kronos decides to let Atlas rot due to his repeated failures.
57[[/folder]]
58
59!!Demigods
60[[folder:Luke Castellan]]
61!!!'''Played by''': Creator/JakeAbel (films), Samuel Braun (young; films), Charlie Bushnell (TV series)
62[[quoteright:299:https://static.tvtropes.org/pmwiki/pub/images/luke_castellan_299x416.jpg]]
63
64Son of Hermes and May Castellan. When he was an infant, his mother tried to become the new host for the Oracle of Delphi. It went horribly wrong. May [[GoMadFromTheRevelation went crazy]] [[MadOracle from visions of her son's eventual future]] and became TheOphelia, and spent Luke's childhood babbling at him about his horrible fate. He ran away and met up with Thalia and Annabeth; they eventually made it to Camp Half-Blood, but not before Thalia [[HeroicSacrifice died]]. Luke went on a failed quest and came back with [[GoodScarsEvilScars a scar]]. He is a major villain in the first series, second only to Kronos, attempting to destroy the gods for their manipulation and abuse towards him.
65
66----
67* TheAce: Good looking, charismatic, a good fighter, and his cabin's counselor.
68* AdaptationalDyeJob: He's blond in the books and films, but has black hair in the Disney+ series owing to Rick Riordan's preference of AbilityOverAppearance.
69* AdaptationalVillainy: In the books, Luke is an AntiVillain who's committed several questionable actions against his former friends, but [[WellIntentionedExtremist genuinely wanted to make things better for demigods who're unclaimed and related to minor gods]] (no cabin of their own parentage and/or ignored by them). As time went on, he began to question his loyalties with Kronos and [[HeelFaceTurn ultimately redeems himself]] in his last minutes. In the films, however, he's a sadistic, power-hungry {{Jerkass}} who doesn't care for the well-being of demigods (not even his own comrades); just wanting to overthrow the gods and rule the world [[DisproportionateRetribution all because he's never seen his father and is willing to revive Kronos as a way to get back at him]].
70* AlwaysSomeoneBetter: To Percy.
71* AntiVillain: Gradually revealed to be this as the series goes on and his more [[EvenEvilHasLovedOnes redeeming qualities]] and [[WoobieDestroyerOfWorlds tragic backstory]] come to the surface.
72* ArchEnemy: Luke is one of Percy's two arch enemies, alongside Kronos. After his defection, he and Percy are firmly embittered toward one another and Percy despises him for endangering so many and hurting Annabeth. It's then subverted as the animosity gradually abates once Kronos takes center stage and the circumstances that led to Luke turning come to light. [[spoiler:Following his HeroicSacrifice to stop the Crooked One, Percy decides to remember Luke for his good qualities while acknowledging he made terrible choices, and his death gives him the gumption to call out the gods for their terrible disregard for their children.]]
73* BrokenAce: He was a handsome fighter and the cabin counselor, and by the time we meet him, he's jaded, unhappy, and desperately craves affection from his aloof father.
74* BrokenBird: RareMaleExample. His hatred of the gods stems from his own bitterness after being basically abandoned by his father his entire life.
75* BrokenPedestal: Percy looked up to Luke as a BigBrotherMentor, until he reveals his true nature and tries to kill him. In the last book, Percy [[RebuiltPedestal regains some respect for Luke]] and honored his wishes to the gods to pay more attention to their children, especially children of the minor gods and giving them cabins of their own. However, Percy acknowledges that Luke ''still'' made [[FreudianExcuseIsNoExcuse bad choices that got his friends hurt]] and acted out [[{{Hypocrite}} no better than the gods themselves]].
76* BigBad: [[DragonInChief He's effectively this]] for the first two books, as [[GreaterScopeVillain Kronos]] is at that point SealedEvilInACan and none of the higher-ranking Titans show up until the third. He's back to this for ''The Battle of the Labyrinth'' with the absence of any other higher-ranking villains, [[spoiler:until he gets possessed by Kronos.]]
77* BigBrotherMentor: To Percy in book one. Implied to have been one to Annabeth too.
78* BigManOnCampus: Seemed to be this before betraying the camp -- he was counselor of the Hermes cabin, attractive, relatively popular, and a BigBrotherMentor to Percy.
79* CallingTheOldManOut: He's pretty pissed at Hermes for being absent from his life, to put it mildly.
80* TheChosenOne: [[spoiler:Luke is "the hero" described in the Great Prophecy whose soul would be reaped, not Percy as everyone initially believed.]]
81* ChronicBackstabbingDisorder: No matter how he claims otherwise, [[spoiler:he keeps hurting Annabeth, the only camper he has protected up until his FaceHeelTurn. Including the time where he poisoned Thalia's tree, tricked Annabeth into taking the sky, and literally wounded her at the end of book five. He doesn't realize it until the last part]].
82* CoolSword: Backbiter. [[spoiler:Doubly deadly due being fashioned out of both Celestial Bronze and steel, meaning it can kill both mortals and gods.]]
83* CrossingTheBurntBridge: If you trick the kid that saw you as a big brother into risking her life for you multiple times, and used her as a hostage against her soon-to-be boyfriend, then the smart thing would be to apologize and make amends if you need her help. [[spoiler:Except Luke doesn't, having the gall to go to Annabeth's house and merely beg her to run away with him before the final battle starts. Annabeth still has a white streak in her hair from holding up the sky, and told him to bug off]].
84* CryingWolf: [[spoiler:Before Kronos possessed him, he ran to Annabeth, begging her to run away with him... And this was ''after'' he tricked her into taking the sky, took her hostage and used her as bait to lure her friends into a trap. She obviously turned him down and it was probably the right decision at the time, because [[ChronicBackstabbingDisorder the boy cannot be trusted]].]]
85* DarkMessiah: Definitely twisted and evil as well as basically Kronos's champion, but [[spoiler:eventually saves the world.]]
86* DemonicPossession: Luke reluctantly allows [[spoiler:Kronos to possess him as the last resort for Kronos's resurrection.]]
87* DeviousDaggers: Luke - the traitor to Camp Half-Blood and son of the God of Thieves - owned a dagger that [[spoiler:he gifted to Annabeth years before]]. Ironically for the usual uses of this trope, Luke's use of this dagger in ''The Last Olympian'' was to [[spoiler:defeat Kronos]].
88* TheDragon: Kronos' right-hand demigod and primary agent. He also serves this role to Atlas during ''The Titan's Curse''.
89* DrivenToSuicide: For a good cause. See HeroicSacrifice below.
90* DrivenToVillainy: His bitterness at his father and the treatment of those in the Hermes cabin drive him to betray the camp.
91* DyingAsYourself: [[spoiler:Luke ultimately ends the series going out as himself, not as Kronos' vessel.]]
92* FaceHeelTurn: Goes from friendly, if somewhat aloof, mentor character to Percy to one of the major antagonists in the series. [[spoiler:And back again, if only [[DyingAsYourself for a few moments]].]]
93* FallenHero: One of Camp Half-Blood's greatest demigods ends up throwing his lot in with Kronos out of hatred for the gods.
94* FantasticRacism: Shows great disdain for Cyclopes because getting kidnapped by one was the reason his best friend, Thalia, got killed. He even bashes at Annabeth for "dishonoring Thalia's memory" just for befriending [[GentleGiant Tyson]]. And there's not a single mention of a Cyclops ever recruited in Luke's Titan Army, likely due to this reason.
95* FatalFlaw: [[BlindedByRage Excessive wrath]]. Luke was unable to forgive Hermes for what he'd been through, from having to run away from his [[spoiler:mentally unstable mother at just nine-years-old]] to failing a pointless quest. Luke's anger blinded him so much that he [[FaceHeelTurn turned against his closest friends]], including Thalia and Annabeth. [[spoiler:By the time he [[HeelRealization realized]] how much harm he's brought upon his friends, it was too late and Luke ended up [[HeroicSacrifice sacrificing himself]] to stop Kronos]].
96** According to Thalia, Luke was also extremely reckless that only worsened after his [[spoiler:first meeting with Hermes, which left him moody and desperate to prove himself]]. Thalia admits that the real reason why they had a lot of trouble getting to camp was because Luke kept wanting to pick a fight with every monster they crossed, which is also an indirect contribution to Thalia's death.
97* ForgivenButNotForgotten: [[spoiler:How the demigods treat Luke after his death. While Percy relishes that Luke died a hero's death by making the right choice in the end (and understood that his anger towards the gods [[ParentalNeglect were justified]]), Percy and everyone else acknowledges that Luke ''still'' made bad choices regardless and willingly hurt the ones who cared about him, [[KickTheMoralityPet especially his closest friends, Annabeth and Thalia, by breaking his promise he made them]].]]
98* FreudianExcuse: Once you find out his backstory in ''The Last Olympian'', it's not hard to understand why he turned out the way her did. [[spoiler:His mother suffered from insanity and his father is distant, driving him to run away from home when he was only nine.]]
99* FreudianExcuseIsNoExcuse: Percy calls Luke out for this in ''The Last Olympian''. [[spoiler:With Luke's backstory, ''any'' kid would be traumatized by their mother developing a bad mental illness to the point where they remain mired in delusion. But that was no excuse for what he did to the campers who trusted him, including Thalia, Percy and Annabeth. [[YouAreWhatYouHate Luke made himself become as bad as the gods he opposed]].]]
100* FromNobodyToNightmare: {{Downplayed}} as he was a senior camper and the head counselor of his cabin, but Luke didn't have a glamorous life as far as half-bloods go. He ran away from his [[spoiler:mentally insane]] mother at age 9, lived homeless for a while, and ended up counselor of the cabin for kids with unknown parentage. He even failed his first quest. But then [[BigBad Kronos]] started speaking to him in his dreams, and the rest is history.
101%%GentlemanThief
102* GoodScarsEvilScars: He has a scar on the right side on his face that he got from the dragon guardian of the Garden of the Hesperides and as the series progresses, it becomes more prominent. Percy states it looks fresh by the last book, [[NothingIsScarier though it's never explained why.]]
103* HalfHumanHybrid: His mother was mortal while Hermes is a god.
104* TheHeavy: For the first four books in the series until [[BigBad Kronos]] [[SealedEvilInACan breaks free from his can]] [[spoiler:and takes possession of Luke's body]].
105* HeWhoFightsMonsters: Started out on the good guys' side, but eventually his resentment against the Olympians drove him to Kronos's side. Percy eventually calls him out for how he may be right about how the gods treat their children, but Luke is only making their situation worse.
106* HeroicSacrifice: [[spoiler:Stabs himself in the side to save Olympus.]]
107* HeroicWillpower: [[spoiler:Throws off Kronos' possession long enough to apologize to Annabeth and complete the above sacrifice.]]
108* HoneyTrap: [[spoiler:For Silena; he seduced her and set her up as TheMole, a decision she later comes to regret.]]
109* {{Hypocrite}}:
110** Accuses the Olympians of their horrendous crimes, yet he sides with the Titans who are no different. Percy calls him out for hurting the campers as badly as the gods hurt or ignored them.
111** Percy outright calls Luke a hypocrite for showing worry that Annabeth is fading from [[spoiler:holding the sky]], even though ''he'' was the one who baited Annabeth into taking in the first place.
112* ICannotSelfTerminate: [[spoiler:A special case, in that he ''can'' self-terminate, he just needs Percy to give him a knife.]]
113* IcyBlueEyes: Percy describes them as "piercing."
114* IKnowYouAreInThereSomewhereFight: [[spoiler:With Annabeth during ''The Last Olympian''.]]
115* InSpiteOfANail: He and Percy are this to each other. They're both sweet, compassionate fighters who become highly admired by their colleagues. Both are proficient swordsmen, handsome, and both consider Annabeth to be one of the most important people in their lives. They even have similar [[InnerMonologue narrative voices]], as demonstrated by his first-person short story in ''The Demigod Diaries''. The divergence hits with their mothers. [[spoiler:Luke's mother was tragically driven insane when she attempted to channel the spirit of the Oracle of Delphi and spent most of his childhood babbling at him about [[SelfFulfillingProphecy his awful fate]], leaving him scared, resentful, and starved for affection. His anger towards the gods was only increased by a quest that left him scarred and mostly ignored by the gods, including his father. He lashes out towards the manipulation by trying to unseat them and almost brings about the end of the world.]] By contrast, [[MommasBoy Percy is closer to his mother than anyone]], and it's heavily implied she taught him everything he knows about kindness, morality, and love. Percy, too, was scared of his fate about the Great Prophecy, but learns to trust his friends and willingly accepts his fate until the time came to pass.
116** Luke is a prime example of who Percy would've become if he had chose to give into [[DespairEventHorizon resentment and despair]] over [[UndyingLoyalty love and loyalty]] to his friends and family.
117* KarmicDeath: [[spoiler:He chooses it, however; Luke is fighting an injured Percy and Annabeth in the climax, while Kronos is possessing him. As Annabeth falls, she reverts to her previous childish demeanor and reminded Luke he promised to never hurt her. Luke pauses, stunned, and gets a HeelRealization. He then stabs himself with Percy's knife, in his weak spot, before Kronos can stop him. As he's dying, Luke promises Annabeth that he'll reincarnate and try to be a better person]].
118* KickTheDog: He [[FrameUp framed]] Percy for stealing Zeus' Master Bolt and Hades' Helm of Darkness, even though Percy [[InnocentBystander wasn't even aware he was a demigod at the time]], and made the boy into his UnwittingPawn. Even though Percy looked up to Luke as a BigBrotherMentor, he ''still'' tried to kill him with Pit Scorpion venom (only being lucky to have survived). Needless to say, Percy takes Luke's actions ''[[ItsPersonal very]]'' [[ItsPersonal personally]], considering that his loved ones all nearly got killed because of him.
119* KickTheMoralityPet: [[spoiler:Tricking Annabeth – the closest thing he had to a sister – into taking the sky and then using her as bait was ''not'' one of his finest moments. Both Percy and Thalia were rightfully appalled by this]].
120* KnightTemplar: Luke wants to take down the gods of Olympus for their unjust treatment of their children... and to do so, he's teamed up with someone ''far worse'' then them.
121* LikeBrotherAndSister: With Annabeth, and Thalia to a degree. They're a little family for sure, but [[ShipTease sometimes he and Thalia come off more as parent substitutes to their little girl.]] The fact that [[spoiler:Luke forgets this and has hurt Annabeth multiple times, to the point where she gives up on him at two different points in ''The Last Olympian'', is an important plot point]].
122* LivingBodysuit: [[spoiler:To Kronos after the latter possesses him.]]
123* LoveRedeems: [[spoiler:In the end, his love for Annabeth drove him to perform his HeroicSacrifice.]]
124* LuckilyMyShieldWillProtectMe: Luke having a shield to defend himself with is a major factor in his victory against Percy in ''The Sea of Monsters".
125* TheManBehindTheMonsters: After joining Kronos, countless nasties from the depths of Tartarus started working for the twenty-something demigod Luke as the Titan King's top earthly servant.
126* MeaningfulName: A castellan is the noble tasked with defending a castle. [[spoiler:So who's the one who ultimately protects Olympus?]] And as noted on the main page, his name means "light" or "light-bringer". Which sounds pretty nice [[FallenAngel until]] you realize it means that because it's derived from ''Lucifer''.
127* MemorialForTheAntagonist: When he dies, [[spoiler:the first thing Percy does is request a proper burial, and Hermes even gives him a final blessing]].
128* MoralMyopia: He's angry about how the gods ignore their children and let them suffer. Then he starts causing some of the suffering, using campers as pawns the ways the gods do, and Luke justifies it. It's not the first or second time of [[spoiler:nearly killing Annabeth, tricking her into "saving" him or using her as a hostage that made him realize he was too far gone]]. No, it was when he [[spoiler:injured her while Kronos was possessing him that spurred his HeelRealization]].
129* MyGodWhatHaveIDone: In ''The Last Olympian'', when he realizes [[spoiler:he's hurt Annabeth ''again'' and broken his promise to her.]] It's the last straw in a larger revelation about exactly how much damage his spitefulness has caused.
130* OxymoronicBeing: His sword Backbiter, a specially made half-steel, half-celestial bronze blade that can kill both mortals and monsters. Percy describes it fighting against itself, like two opposing magnets stuck together. [[spoiler:It's actually the "beta" form of Kronos' scythe, and has to be bathed in blood in order to fuse the metals together.]]
131* PromotionToParent: For Annabeth when they were on the run.
132* RageAgainstTheHeavens: He wants to resurrect Kronos in order to destroy the gods.
133* RedemptionEqualsDeath: [[spoiler:Kills himself in order to defeat Kronos, who his body has been jacked by, and save the world.]]
134* ShipTease: With Thalia in ''The Titan's Curse'' and ''The Diary of Luke Castellan.''
135* SoulJar: For [[spoiler:Kronos.]]
136* StartOfDarkness: The fight on Half-Blood Hill, when Thalia was killed as part of Hades' revenge for the death of Maria di Angelo, and Zeus "saved" her by turning her spirit into a tree. Luke didn't take the gods' version of mercy well.
137* SupernaturalGoldEyes: [[spoiler:When possessed by Kronos]].
138* TragicHero: He UsedToBeASweetKid, but his bitterness from being abandoned by his father Hermes drove him to betray his friends at Camp Half-Blood and plan to destroy the gods.
139* UnreliableIllustrator: Luke's scar has been consistently described as being on the right side of his face, but in the [[https://riordan.fandom.com/wiki/Luke_Castellan?file=Luke+Castelllan.jpg first piece of official art we ever got for him]], it's inexplicably on his left.
140* TheUnreveal: Given how long [[spoiler:reincarnation takes, along with the sheer number of trials required to earn a spot in Elysium, Percy and Annabeth are unlikely to find out where Luke will be reborn when he says he'll choose that over the Underworld. Hades is also a grudgeholder, so he's not likely to give Luke an easy next life given Luke endangered his children, Bianca and Nico, and even stole his helm]].
141* UsedToBeASweetKid : Evident in his diary. [[TearJerker He sounds a lot like Percy.]]
142* TheVamp: RareMaleExample. [[spoiler:Silena's confession in ''Olympian'']] features Rick trying as hard as he can to play this trope without his editors coming down on him. She's the only person who explicitly accuses him of it, but given his penchant for straightforward manipulation, it's not out of the question that it was a regular strategy for him.
143* VillainHasAPoint: Luke despises the Olympians for being a bunch of psychopaths who use their children as slaves and sometimes outright neglecting them of their true heritage, and not even allowing children of ''minor'' gods to have their own cabins in camp. Given how ''cramping'' the Hermes Cabin was, Luke wasn't entirely wrong there. On the other hand, he believes that the gods must be exterminated, and that is where he's ''dead wrong''; Dionysus explained near the end of ''The Last Olympian'' that the world ''[[CantLiveWithoutYou needs]]'' the gods as much as the gods need help from their demigod children, [[PoorCommunicationKills whether they admit it or not]].
144* WellDoneSonGuy: [[WhamLine "You said they cared about me!"]]
145* WellIntentionedExtremist: At the end of the day, his main motivation is a desire for the half-blood population to be acknowledged by their parents, instead of used as pawns and then pushed aside. Problem is, he thought resurrecting an ObviouslyEvil primordial entity was a valid social justice movement. By ''Heroes of Olympus'', Percy fully understands and accepts ''why'' Luke [[FreudianExcuse went down the path he did]] and had a valid point that most of the gods tend to neglecte their children. And if Ethan Nakamura, a son of Nemesis, being crammed in the Hermes cabin is anything to go by, his godly parent ''had'' no cabin in camp, even if he was claimed.
146* WeUsedToBeFriends: He was popular and well-liked in the camp before his turn to evil, and this dynamic is especially pronounced in his interactions with Thalia and Annabeth (with whom he shares history) and Percy (who saw him as a BigBrotherMentor).
147* WillingChanneler: Kronos coerces him into submitting to possession.
148* WoobieDestroyerOfWorlds: To the point when even the victims of his nefarious acts (Silena, Thalia, Annabeth) show compassion for him and want to help him. Even Percy, who outright yet justifiably resents him for endangering his life, feels bad for the guy in the end.
149* WorthyOpponent: To Percy. It's mentioned that Luke is the only one who could match Percy's swordsmanship.
150* WouldHurtAChild: Despite being seven years older than Percy and Annabeth, he had no qualms poisoning a twelve-year-old Percy with deadly Pit Scorpion venom (only being lucky to have survived). Then, he allowed his monsters to devour Annabeth alive twice while she was thirteen at the time, and then left her to bear the Titan's Curse alone in order to blackmail Artemis.
151* YouCantFightFate: [[spoiler:His parents have known since he was an infant what would happen to him. His mother's mad ravings about it and Hermes' refusal to elaborate were what drove Luke away from them.]]
152
153[[/folder]]
154
155[[folder:Ethan Nakamura]]
156!!!'''Played by''': Danny Le Boyer
157[[quoteright:299:https://static.tvtropes.org/pmwiki/pub/images/ethan_with_the_shield_299x416.jpeg]]
158
159
160Son of Nemesis, the goddess of revenge and balance, Ethan was one of the many residents of Cabin Eleven who went unclaimed or had no cabin of their own because their parents were minor gods. He promised his mother he would make a place on Olympus for the minor gods, and in exchange she took his eye.
161
162----
163* AntiVillain: He doesn't desire anything for himself. Instead, he wants to elevate his mother and other minor gods to be on the same level as the Olympians, after being sick of seeing them getting sidelined all the time and receiving no respect from everyone. This is a very, very honorable goal, yet the heroes (including Percy), who are mostly children of the Olympians, are very slow to empathize or catch this up. The only thing that stops him from becoming a DesignatedVillain is that the side he currently works for, the Titans, are AlwaysChaoticEvil.
164* CoDragons: He and Prometheus become this for Kronos after Hyperion's defeat.
165* DisneyVillainDeath: [[spoiler:After Ethan is mortally wounded in his failed attempt to kill Kronos, the titan opens a fissure in Olympus that his body falls into.]]
166* EyepatchOfPower: Wears one to cover his missing eye.
167* EyeScream: His mother took his eye part of the promise that he would change Olympus for the better.
168* FallenHero: As a former camper.
169* HandicappedBadass: When he fights Percy in ''Battle of the Labyrinth'', Percy attempts to take advantage of his lack of an eye by aiming more attacks at his left side. Presumably, Ethan has trained himself to compensate for this flaw since the tactic doesn't work.
170* HeelFaceRevolvingDoor: Starts out as a hero, then turns to Kronos's side, then [[spoiler:turns back to being a hero again at the last second in ''The Last Olympian'', resulting in his death]].
171* HoistByHisOwnPetard: [[spoiler:When he tries to kill Kronos, Ethan's blade shatters and one of the pieces spears him.]]
172* IneffectualSympatheticVillain: Every attempt he makes to oppose Percy end with him trounced and Kronos treats him like an annoyance half the time.
173* IJustWantToBeSpecial: During a peace talk, he explains he turned against the gods and joined Kronos because he was tired of being considered a nobody at Camp Half-Blood for being the son of a minor goddess.
174-->'''Ethan:''' [[DudeWheresMyRespect All I want is respect]], Jackson. The gods never gave me that. [[ArmorPiercingQuestion You wanted me to go to your stupid camp, spend my time crammed into the Hermes cabin because I'm not important? Not even recognized?]]
175* JerkassHasAPoint: He was an UngratefulBastard to Percy for saving his life, but Ethan points out that his mother, Nemesis, has no cabin at Camp Half-Blood because she's a minor goddess and "not important enough". Even if he had wanted to go back, claimed and all, he'd be forced to bunk in the ''extremely'' crammed Hermes cabin. This is one of the major factors that motivated Percy into calling the major gods out for not only [[ParentalNeglect neglecting their kids]], but also [[DudeWheresMyRespect disrespecting children of the minor gods]] and that they deserve their own cabins at camp.
176* MasterSwordsman: While he eventually loses, he fights evenly with Percy in ''The Battle of the Labyrinth'' and duels Annabeth in ''The Last Olympian.''
177* MookLieutenant: Kronos/Luke's main demigod subordinate during ''The Last Olympian.''
178* PrideBeforeAFall: His mother is the goddess that causes the "fall" part of this trope. Ethan himself follows in her footsteps.
179* RedemptionEqualsDeath: [[spoiler:In ''The Last Olympian'', he changes sides at the last second when he realizes that Kronos doesn't build, only destroys, and tries to kill Kronos. Kronos, in turn, kills him for turning against him]].
180* ScalesOfJustice: Ethan Nakamura's burial shroud has a set of scales on it. This is because Nemesis is his mother.
181* SmallRoleBigImpact: While there are several other factors, Ethan's desperate goal to elevate his mother is basically what pushed Percy to [[spoiler:campaign for the rights of the minor gods at the end of the ''The Last Olympian'', something that is duly granted, thus granting 10 and more cabins to be constructed in Camp Half-Blood for ''The Heroes of Olympus'' series and beyond.]]
182* StealthPun: He is blind in one eye. His goal is to bring justice for the minor gods. You could say... justice is blind. (Or, in this case, half blind.)
183* TarotMotifs: 8th/11th, Justice. The card shows a blindfolded woman holding a sword and scales. Ethan has one eye missing and [[spoiler:his burial shroud is embroidered with crossed swords and a set of scales]].
184* UngratefulBastard: [[spoiler:Despite Percy saving his life, Ethan pledges his loyalty to Kronos. This is the last demigod needed to resurrect Kronos.]]
185[[/folder]]
186
187[[folder:Chris Rodriguez]]
188One of Luke's allies and a fellow son of Hermes. For related tropes, see [[Characters/TheCampHalfBloodSeriesCampHalfBlood here]].
189[[/folder]]
190
191[[folder:Luke's Spy]]
192Luke's spy among the ranks of Camp Half-Blood. For related tropes, see [[Characters/TheCampHalfBloodSeriesCampHalfBlood here]].
193[[/folder]]
194
195[[folder:Alabaster C. Torrington]]
196Demigod son of Hecate, who fought for the Titans in the last war. He shows up only in ''Son of Magic'', a short story at the end of ''The Demigod Diaries''.
197
198----
199* AntiHero: An unrepentant soldier of Kronos and exile from Camp Half-Blood is a rather unlikely hero for one of Riordan's stories.
200* AntiVillain: In the [[Literature/PercyJacksonAndTheOlympians first series]], he was one of the demigods working for Kronos. His reasoning (much like the other demigods) was that he was mistreated just for being unclaimed (which he was).
201* ArmorPiercingQuestion: After Claymore asks what happens when we die, Alabaster asks him why after all his research he doesn't know.
202* {{BFS}}: According to Claymore, his sword must weigh a hundred pounds.
203* CainAndAbel: The Abel to Lamia's Cain.
204* HalfHumanHybrid: He's a demigod and his mother is the goddess of magic.
205* HeelFaceTurn: In his debut story at least, he works with Claymore to defend against his murderous sister Lamia. Alabaster acknowledges that he made a bad choice in supporting Kronos's forces, and is working to make up for that.
206* NeverMyFault: His banishment was because he urged his mother to keep fighting against the Olympians and made it clear he wasn't going to submit, but he just blames Olympus along with Percy who had really nothing to do with it.
207* RememberTheNewGuy: Is stated to have been the leader of the demigods on Kronos' side, but was never mentioned in the original series. Admittedly only handful of the demigods with Kronos were actually named so there is some wiggle room, but Luke was the only one shown calling the shots.
208* TheRemnant: One of the few demigods on Luke's/Kronos' side who both survived and doesn't regret his service. Safe to say he's not a fan of the Olympians or Percy.
209* SoreLoser: Still holds a major grudge against the Olympians for winning. Deconstructed as this resulted in his banishment.
210* UnknownRival: Hates Percy while Percy likely has no idea who he is.
211* UnreliableNarrator: Downplayed. His account of the Titan War is generally accurate if colored by his personal biases.
212* WelcomeBackTraitor: Averted, as he can't go back to Camp Half-Blood.
213[[/folder]]
214
215!!Titans
216[[folder:Atlas]]
217[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/atlas_gn.png]]
218The Titan of Strength, nephew of Kronos, and father of the Hesperides and Calypso. For his role in the first Titanomachy, he was charged with holding up the sky.
219----
220* AndIMustScream: Has been holding up the sky for a very, ''very'' long time.
221* ArchnemesisDad: [[spoiler:To Zoë]].
222* ArcVillain: Of ''The Titan's Curse''.
223* TheBrute: Is the most physically strong of the Titans.
224* TheDragon: Kronos' right-hand Titan and greatest warrior. [[spoiler:He gets demoted and replaced by Hyperion after his failure in the third book.]]
225* EvilSoundsDeep: His voice is described as being very, ''very'' deep.
226* GeniusBruiser: Despite being the Brute, he also is shown to be quite intelligent and a fairly good manipulator.
227* HumansAreTheRealMonsters: The reason he likes to recruit mortals; he feels like they are easy to corrupt, and as such make for good minions.
228* KnightOfCerebus: The fight with him is the first one in the series where [[spoiler:a questmate dies.]]
229* LargeAndInCharge: The General of Kronos' troops, and described as incredibly tall and large.
230* OffingTheOffspring: [[spoiler:Does this to Zoë]].
231* SealedEvilInACan: The sky itself is a fairly potent prison.
232* YouHaveFailedMe: [[spoiler:On the receiving end of this. For his failure, Kronos opts not to free him from having to hold up the sky again.]]
233[[/folder]]
234
235[[folder:Hyperion]]
236[[quoteright:266:https://static.tvtropes.org/pmwiki/pub/images/hyperion_7.png]]
237The Titan of Light.
238----
239* BuriedAlive: [[spoiler:How he is defeated in ''The Last Olympian''.]]
240* CessationOfExistence: [[spoiler:Tartarus absorbs his and Krios' essences in ''The House of Hades''.]]
241* TheDragon: Second-in-command to Kronos, is the only one fighting in the Battle of Manhattan with him, and is the second most powerful.
242* ElementalPowers: He has [[PlayingWithFire fire]] and [[LightEmUp light]] powers.
243* GodOfLight: Well, Titan of Light, but still.
244* LightIsNotGood: The Titan of Light (and uses light and fire-based powers), but ''very'' evil.
245* ThePowerOfTheSun: As the Titan of Light.
246[[/folder]]
247
248[[folder:Krios]]
249The Titan of Stars and Constellations.
250----
251* ButtMonkey: He thinks of himself this way.
252* CessationOfExistence: [[spoiler:Absorbed by Tartarus in ''The House of Hades'']].
253* HornsOfVillainy: His helmet has a set of ram horns. He thinks they look stupid and privately grumbles about it.
254* TheResenter: To the other Titans.
255* StarPower: Though the extent of his power is not known, since his battles are never described.
256* VillainOfAnotherStory: ''The Lost Hero'' reveals he was off defending Mount Othrys [[spoiler:from the Romans]].
257* WhatHappenedToTheMouse: Before ''The Heroes of Olympus'' series is released, his fate is left hanging, as he is the only Titan to be introduced but not be faced by the heroes. ''The Lost Hero'' clears this up right away by [[spoiler:Jason claiming that he personally defeated Krios while the Romans were attacking Mount Othrys.]]
258[[/folder]]
259
260[[folder:Oceanus]]
261The Titan of Oceans.
262----
263* AdaptationalVillainy: In the original myths, he one of the few Titans (other than Prometheus and his brother) explicitly stated ''not'' to take part in the Titanomachy. Poseidon takes notice of this and states this only proves how bad things really are, as Oceanus wouldn't have joined forces with Kronos if he didn't feel confident in him winning.
264* HornedHumanoid: Has bull horns.
265* KnowWhenToFoldEm: [[spoiler:Retreats after Kronos' defeat. He has nothing left to gain but trouble if he keeps fighting Poseidon at that point.]]
266* MakingASplash: Part of his domain. He ''was'' the supreme ruler of the sea before Poseidon was born.
267* OurMermaidsAreDifferent: Mainly takes shape of a merman, though he does able to change into humanoid form.
268* ScrewThisImOuttaHere: After Kronos' defeat, Oceanus escapes back to the ocean. Why Poseidon doesn't pursue him is unknown, but they may rule different parts of the sea.
269* TheSiege: Launches a siege against Atlantis in ''The Last Olympian''. [[spoiler:He manages to conquer it after Poseidon leaves to assist the battle against Typhon, but he releases it once Kronos is defeated.]]
270[[/folder]]
271
272[[folder:Prometheus]]
273[[quoteright:300:https://static.tvtropes.org/pmwiki/pub/images/prometheus_9.png]]
274Titan of craftiness and forethought. Sided with the Olympians in the first war, but out of a desire for revenge on Zeus and thinking the Olympians cannot win switches sides to the Titans.
275
276----
277* AdaptationalVillainy: Again, like Oceanus, a Titan who's on the gods' side in the first war is turning their back in favor of the Titans. Although it's pointed out he's at least partially doing it [[AndIMustScream out of revenge for Zeus chaining him to a rock and having a vulture eat his liver every day for centuries]]. For some reason, he's also totally cool with Kronos' plan to kick humanity back to the stone age, when in the original myths his defining trait was caring for humanity so much that he ''defied Zeus'' to give them fire.
278* AffablyEvil: If one can call him evil.
279* AntiVillain: His main motivation is getting back at what Zeus did to him - which, when you keep in mind [[DisproportionateRetribution what]] Zeus [[AndIMustScream did]] to him, isn't entirely unjustified.
280* IFightForTheStrongestSide: He's foreseen that the Titan's will win the war and this is why he's on their side.
281* IfMyCalculationsAreCorrect: Implied that part of his foreknowledge is his ability to calculate probability to predict the most likely outcome.
282* KnowWhenToFoldEm: After Kronos's defeat, he went into hiding and sent a list of excuses to Zeus explaining his actions. According to Hermes, Zeus ''probably'' won't punish him, as long as he keeps his head down for the next few centuries or so.
283* RevengeBeforeReason: One possible interpretation of his defection. He himself doesn't even deny he wants revenge when Percy brings it up.
284* ScarsAreForever: Thousands of years after Hercules freed him he still has the scars from the vulture that tortured him every day during his punishment. Percy compares their appearance on his human-sized form like he was attacked by a ''very'' angry hamster.
285* TheSmartGuy: Among the Titans who appear, he's the most intelligent and predicts the Olympians' loss this time.
286* VillainHasAPoint: He is right that the Gods tend to be jerks a lot like when they unfairly punished him and the other neutral Titans.
287[[/folder]]
288
289[[folder:Koios]]
290Titan of the North and forethought. He was said to take part in the war but never appeared, so his tropes can be found [[Characters/TheCampHalfBloodSeriesForcesOfGaia here]].
291[[/folder]]
292
293!!Gods
294[[folder:Hecate/Trivia]]
295Goddess (technically Titaness) of magic. For related tropes see [[Characters/TheCampHalfBloodSeriesMinorGods here]].
296[[/folder]]
297
298[[folder:Janus]]
299[[{{Foreshadowing}} Roman]] god of choices.
300----
301* {{Foreshadowing}}: Janus is a Roman god, among a world that's been so far established to be Greek through and through. This would end up foreshadowing the existence of the Greek Gods's Roman counterparts in ''Literature/TheHeroesOfOlympus''.
302* MultipleHeadCase: He has two faces, each of which has its own mind.
303* SadisticChoice: His favorite kind.
304* SadlyMythtaken: Janus is treated in the novels as a minor, secondary god of lesser importance. In truth, Janus was one of the most important and revered Roman gods, considered as an equal power to the twelve Olympians.
305* TwoFaced: He has a face on the left and right sides of his head.
306[[/folder]]
307
308[[folder:Keto]]
309Goddess of sea monsters.
310----
311* BrotherSisterIncest: Her husband is her brother, Phorcys.
312* MonsterProgenitor: She gave birth to Ladon, the skolopendra, the gorgons, and the Grey Sisters. Her most notable child is Echidna, herself an infamous MonsterProgenitor, making Keto the proud grandmother to a whole host of nasties.
313[[/folder]]
314
315[[folder:Melinoe]]
316Goddess of ghosts.
317----
318* DeadPersonImpersonation: As the goddess of ghosts, she can take on the appearance of anyone who has died.
319* {{Sadist}}: She sided with Kronos because Hades won't allow her to torment mortals during the day.
320* TwoFaced: All the way down her body. One side is pale and bloodless, the other black and mummified.
321[[/folder]]
322
323[[folder:Morpheus/Somnia]]
324God of dreams.
325----
326* ConvenientComa: He can put people to sleep for months at a time if it suits him.
327* TheFaceless: He has a face, but it's blurry and constantly shifting so no one can actually remember it.
328* ForcedSleep: If he doesn't want you awake, you won't be.
329* PsychicDreamsForEveryone: He's the one responsible.
330[[/folder]]
331
332[[folder:Nemesis]]
333Goddess of balance and vengeance. For related tropes, see [[Characters/TheCampHalfBloodSeriesMinorGods here]].
334[[/folder]]
335
336[[folder:Phorcys]]
337God of the dangers of the sea.
338----
339* BrotherSisterIncest: With Keto.
340* MonsterProgenitor: He's the father of Keto's various children.
341* SillyWalk: He moves much like a crab.
342[[/folder]]
343
344[[folder:Pomona]]
345Roman goddess of plenty.
346----
347* EdibleAmmunition: Throws food at Percy when he only weakly responds to her rant.
348* LivingStatue: Only appears as an angry living statue.
349[[/folder]]
350
351!!Monsters
352[[folder:The Minotaur]]
353[[quoteright:300:https://static.tvtropes.org/pmwiki/pub/images/minotaur_9.png]]
354The bull-headed son of Pasiphae and the Cretean Bull and the first monster Percy ever faces.
355----
356* BackForTheFinale: He returns in ''The Last Olympian''.
357* BattleTrophy: His horn is left behind after Percy kills him with it. Once he regenerates, he returns the favor by collecting the camp necklaces of the half-bloods he kills.
358* FoeTossingCharge: His favored tactic.
359* HalfHumanHybrid: Half human, half bull.
360* ImpaledWithExtremePrejudice: How Percy kills him. [[spoiler:Both times.]]
361* StarterVillain: He's the first supernatural being Percy encounters.
362* VillainForgotToLevelGrind: Percy's taken several levels in badass by the time they fight again. As a result, the Minotaur is quickly reduced to dust.
363* WalkingShirtlessScene: In his first appearance.
364[[/folder]]
365
366[[folder:Agrius and Oreius]]
367A pair of twins born from a union of human and bear. They serve as Luke's bodyguards.
368----
369* BearsAreBadNews: Two half bears adds up to one full bear's worth of danger.
370* BodyguardingABadass: They're actually less dangerous than the person they're supposed to guard.
371* DumbMuscle: Neither of them are particularly intelligent, though Oreius is ''far'' dumber than his brother.
372* HalfHumanHybrid: Half human, half bear.
373[[/folder]]
374
375[[folder:Dr. Thorn]]
376[[quoteright:225:https://static.tvtropes.org/pmwiki/pub/images/the_ultimate_guide_p_003.png]]
377A manticore posing as a professor in Westover Hall.
378----
379* AdaptationalWimp: In most myths, the manticore's venom is ''instantly'' fatal; by Thorn's own admission, his venom causes pain and paralysis, but won't kill.
380* BewareMyStingerTail: A scorpion tail that shoots spikes.
381* CruelAndUnusualDeath: Mr. D crushes him to death with grapevines.
382* TheHeavy: To Atlas for most of ''The Titan's Curse''.
383* MixAndMatchCritters: Part lion, part human, part scorpion.
384* NearVillainVictory: He comes ''very'' close to killing Percy and his friends.
385* OurManticoresAreSpinier: A manticore in disguise.
386* PoisonedWeapons: The spikes fired from his tail are poisonous.
387* SanitySlippage: The stress caused by his role in Atlas's army combined with constant failures takes a tole on his mental health. He is calculating and puts on an air of sophistication at the start of the story but behaves nearly as bestially as his appearance by the end.
388[[/folder]]
389
390[[folder:The Nemean Lion]]
391A lion with invulnerable skin first killed by Heracles.
392----
393* AttackItsWeakPoint: Only its skin is invulnerable, not the inside of its mouth. For its part, it's entire aware of this trope and tries to open its mouth and eyes as little as possible while fighting.
394* BattleTrophy: Its pelt is left behind after its death.
395* NighInvulnerability: Its skin is completely impervious to harm.
396[[/folder]]
397
398[[folder:Kelli]]
399An empousai who first served in Kronos's army, but later revealed to have actually been serving Gaea. Her tropes can be found [[Characters/TheCampHalfBloodSeriesForcesOfGaia here]]. For more on ''empousai'' go [[Characters/TheCampHalfBloodSeriesMonsters here]].
400[[/folder]]
401
402[[folder:Tammi]]
403An empousai that posed as a cheerleader in Goode High School. She is Kelli's trainee. For more on ''empousia'' go [[Characters/TheCampHalfBloodSeriesMonsters here]].
404
405----
406* AllGuysWantCheerleaders: Unfortunately it's implied to be how she gets her [[ToServeMan food]].
407* ChuckCunninghamSyndrome: Her sister Kelli reappears in ''The House of Hades'', but she doesn't. Her essence is most likely still down in Tartarus, reforming.
408* GibberishOfLove: Her [[CharmPerson charm]] causes this.
409-->''"I said something really intelligent like, 'Uhhh?'"''
410* IcyBlueEyes: Only in her human form though.
411* KissOfDeath: Tries and fails to entice Percy into one of these.
412* ObfuscatingStupidity: She puts on a ValleyGirl accent to try and appear harmless.
413* PomPomGirl: As part of her cheerleader disguise.
414[[/folder]]
415
416[[folder:KampĂȘ]]
417Ancient jailer of the cyclopses and hundred-handed ones.
418----
419* TheDreaded: Briares is absolutely terrified of her.
420* DualWielding: She dual wields scimitars.
421* HybridMonster: She's some combination of gorgon, dragon, and centaur.
422* LaserGuidedKarma: She's killed by one of her own former prisoners.
423* PoisonedWeapons: One touch from her blades will make you shrivel into dust.
424* WardensAreEvil: Just ask any of her prisoners.
425[[/folder]]
426
427[[folder:Karkinos]]
428A giant crab first sent by Hera against Heracles during his battle with the hydra.
429----
430* AttackItsWeakPoint: Its armor is nearly impenetrable, but like all crab it has a weak spot on its underbelly.
431* GiantEnemyCrab: Natch.
432[[/folder]]
433
434[[folder:Clazmonian Sow]]
435A giant flying sow sent against the defenders of Long Island.
436----
437* AirborneMook: It's the flying equivalent of the Erymathian Boar.
438* PinkMeansFeminine: It's female and bright pink.
439[[/folder]]
440
441[[folder:Lydian Drakon]]
442A giant drakon, fated to be killed by a child of Ares, that was sent against the defending forces of Long Island.
443----
444* AlienBlood: It bleeds green.
445* AttackOfTheFiftyFootWhatever: It's a two hundred foot long snake.
446* BattleTrophy: Its skin is left behind after it dies.
447* DeathGlare: Potent enough to paralyze anyone who makes eye contact.
448* EyeScream: Percy stabs out one of its eyes.
449* MakeMeWannaShout: Its roar shatters every window on the block.
450* NighInvulnerability: Not a magical variety, it just has really thick armor.
451* PlotArmor: A justified in-universe version. It's so dangerous because only a child of Ares can kill it, making any other attempt futile.
452* SnakesAreSinister: It's a giant snake and a key part of one of Kronos's schemes.
453* SuperSpit: It spits acidic poison.
454[[/folder]]
455
456[[folder:Queen Sess]]
457Queen of the Scythian Dracanae.
458----
459* KingMook: Queen actually.
460[[/folder]]
461
462[[folder:Hellhounds]]
463Monstrous hounds from the Underworld that serve many masters. For related tropes, see [[Characters/TheCampHalfBloodSeriesMonsters here]].
464 [[/folder]]
465
466[[folder:Spartoi]]
467Spartoi (singular spartus) are skeletal warriors created by planting the teeth of dragons and watering them with blood.
468----
469* ArmiesAreEvil: Their Mist disguises look like soldiers, fitting with Atlas's military motif.
470* BattleBaton: Their preferred melee weapons.
471* BloodMagic: Part of the ritual that creates them.
472* ColorMotifs: Grey.
473* EliteMooks: They're much more threatening than any of the other monster groups the heroes face.
474* GlowingEyesOfDoom: The only patches of color on them are their glowing yellow eyes.
475* LetsSplitUpGang: They split up to cover more ground.
476* MugglesDoItBetter: Most of Kronos's warriors use weapons from the era of their birth. The spartoi use guns.
477* NighInvulnerability: They're immune to the usual methods of monster killing and can only be destroyed by [[spoiler:a child of Hades.]]
478* TheNoseKnows: Once they have a scent they can track their prey across a continent.
479* OurZombiesAreDifferent: Unlike the skeletal warriors used by Hades they're their own species rather than animated remains, albeit one with strong ties to the underworld.
480* PerpetualMotionMonster: They never tire in combat or on the hunt.
481* PullingThemselvesTogether: If you smash them apart they'll just pull themselves together and keep coming.
482* SuperPersistentPredator: They ''never'' give up once they have a target. The prey can put distance between them through a variety of mundane and magical means, but the spartoi will march after them until the gap is closed. The prey can hide behind magical barriers, but the spartoi will find a way through. In short, the hunt doesn't end without the death of the hunted of the hunters.
483* TrueSight: They can't be fooled by illusions or invisibility.
484[[/folder]]
485
486[[folder:Telekhines]]
487The former blacksmiths of the gods, creators of Posiedon's trident and Kronos's scythe.
488----
489* AquaticMook: They have the best maneuverability in the water out of any of Kronos's forces.
490* TheBlacksmith: For Kronos's army.
491* TheDogBitesBack: They're bitter about being used and discarded by the gods so they sided with Kronos to overthrow them.
492* KillItWithFire: They're fireproof, so a favored tactic of theirs is to throw lumps of molten metal at foes.
493* MonstrousSeal: They look like a combination of seals, dogs, and humans.
494* {{Mooks}}: Some of them show up as warriors during Kronos's assault on Long Island.
495[[/folder]]
496
497[[folder:Keres]]
498Battlefield spirits of plague and famine.
499----
500* PoisonedWeapons: Their claws inflict plagues with but a scratch.
501* WingedHumanoid: Their general appearance.
502[[/folder]]
503
504!!Other
505[[folder:Mortal Mercenaries]]
506Ordinary humans enticed to serve those who would destroy them.
507----
508* BlackHelicopter: Their primary form of transport.
509* BloodKnight: Atlas appreciates their violent tendencies.
510* DrivenToMadness: Some of them are temporarily driven mad by Mr. D.
511* {{Mooks}}: For Atlas.
512* {{Muggles}}: Just humans who were hired by the Titan Army.
513* OnlyInItForTheMoney: They get paid and they follow orders. Justified, as they don't exactly know about the centuries long mythical conflict and as such can't really choose a cause.
514* PrivateMilitaryContractors: Their line of work.
515* TheUnfought: They mainly appear in support roles, while any that actually threaten the heroes are dealt with by others. Justified, as the heroes are all carrying weapons that couldn't harm mortals if they tried.
516* WeakWilled: The Mist and other forms of magical mind control do away with petty moral concerns.
517[[/folder]]
518
519[[folder:Typhon]]
520Child of Gaia and Tartarus, one of the most dangerous beings to every walk the earth. While he served a tremendous role in Kronos's war plan he was not truly part of his army, so his tropes can be found [[Characters/TheCampHalfBloodSeriesMonsters here]].

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