Skeletons were monsters used by various people, notably Hades and his son, Nico. They serve as either soldiers or menial laborers. Some of them can only be killed by Hades or his children. They are almost impossible to kill.

The Skeleton Warriors crowning Percy in his dreams (Graphic Novel).

Percy Jackson and the Olympians

The Lightning Thief

Hades has skeletons in different military uniforms, guarding the halls of his Palace. These surround Percy Jackson, Annabeth Chase, and Grover Underwood when they are in the palace and would have killed them if not for Poseidon's Pearls.

The Titan's Curse

Main article: Skeleton Warriors

A Skeleton Warrior, on the cover of The Titan's Curse

The General summons a variety of Skeleton Warriors to kill the Hunters, Zoë Nightshade, and Bianca di Angelo, but they chase after Percy instead after getting his smell. Bianca is able to kill one, and later, Nico di Angelo sends the rest to the Underworld before either realizes they are children of Hades.

The Battle of the Labyrinth

Nico employs skeletons in rituals to call the spirit of his sister to speak with him.

The Last Olympian

When trying to escape the Underworld, Nico uses his power over the dead to put the skeletons he sees to sleep. However, this also causes him to become very tired. Near the end of the final battle he and Hades bring an army of skeletons to battle the Titan Army. Later, a group are constructing Nico's new cabin at Camp.

Rick Riordan Presents

The Storm Runner

When Zane Obispo, Hondo Obispo, and Brooks arrive at the Beverly Hills Hotel, Flanco, a skeleton guard, lets them into the hero twin’s birthday party and saves the three when Ah-Puch attacks the party.


  • With the exception of Atlas' skeleton warriors, most skeletons are not described as anything more than skeletons.
  • They are seen holding many different weapons such as swords, guns and grenade launchers.
Species: Arai | Blemmyae | Basilisks | Centaur | Cyclopes | Dragon | Drakon | Empousai | Fire-Breathing Horse | Gegeines | Gemini | Ghoul | Giants | Gorgons | Harpies | Hekatonkheires | Hippalektryons | Hippocampi | Hyperborean Giants | Ichthyocentaur | Karpoi | Katoblepones | Keres | Laistrygonian Giants | Lycanthrope | Makhai | Merpeople | Myrmekes | Nikai | Nymphs | Pegasus | Satyrs | Stymphalian Birds | Telekhines | Scythian Dracanae | Sirens | Unicorns | Venti | Yales
Friendly Monsters: Argus | Blackjack | Briares | Bombilo | Chiron | Cottus | Don | Ella | Festus | Gleeson Hedge | Gray | Grover Underwood | Guido | Gyges | Lysas | Mellie | Mrs. O'Leary | Ophiotaurus | Peaches | Peleus | Porkpie | Rainbow | Scipio | Tyson | Tempest | Sssssarah
Enemy Monsters: Antaeus | Agrius and Oreius | Arachne | Cacus | Carthaginian Serpent | Charybdis and Scylla | Chimera | Chrysaor | Clazmonian Sow | Colchis Bulls | Echidna | Euryale | Geryon | Joe Bob | Kampê | Kekrops | Ladon | Lamia | Manticore | Medusa | Minotaur | Nanette | Nemean Lion | Polyphemus | Python | Sphinx | Stheno | Typhon | Trojan Sea Monster
Neutral Monsters: Carnivorous Sheep | Cerberus | Erymanthian Boar | Gray Sisters | Flesh-Eating Horse | Furies | Gryphon | Orthus | Skolopendra | Sybaris
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