Greco-Roman creatures List of characters in mythology novels by Rick Riordan

apollo s cattle – sacred cattle herd of apollo. in battle of labyrinth, apollo s cattle seen @ triple g ranch under geryon s care since apollo never has time take care of them. apollo unaware using of cattle meat , feeding them monsters work kronos. although apollo didn t have cattle in actual greek mythology, these cattle based on cattle of helios.
arai – arai race of winged female daemons inhabit tartarus. similar furies, number not limited three, , under control of mother, nyx, instead of hades. spirits carry grudge of whom killer have wronged; when percy kills of them, release grudges of kampê s death crushing , calypso s isolation in ogygia.
arion – arion horse born neptune , ceres, making him percy s half-brother. appears in son of neptune hazel frees him amazons. described having tan coat black mane , tail. free spirit , seems have bad temper, being known curse when abilities challenged.
automaton – automatons similar highly developed robots intricate circuitry makes them hard fix. made out of steel, festus dragon made out of celestial bronze or other materials. in percy jackson & olympians series, annabeth discovers many statues in manhattan automatons created daedalus, army either defend or attack olympus.

argentium – reyna s silver automaton hound appears in son of neptune, mark of athena , house of hades.
aurum – reyna s gold automaton hound appears in son of neptune, mark of athena , house of hades.
bronze dragon – automaton dragon made of bronze created campers in hephaestus cabin defend camp half-blood. first shown in percy jackson , bronze dragon story of demigod files percy, annabeth, , silena reactivate in order save charles beckendorf myrmekes. deactivated beckendorf percy s afterwards, due fact unstable , dangerous. fixed hephaestus cabin protect camp sometime after this. later named festus leo valdez in lost hero when leo found him hidden in forest. leo manages forge wings onto festus. although festus sliced bits lasers on king midas mansion, festus head recovered hephaestus had cabin build argo ii festus head ship s figurehead. festus means happy in latin.
celedon – celedons automatons forged hephaestus serve apollo s backup singers. in percy jackson , singer of apollo, percy jackson had find fourth celedon apollo after left mount olympus , fled times square.
colossus of nero – colossus of nero gigantic automaton built under nero s orders in images of apollo , himself. nero uses statue invade camp half-blood in hidden oracle. colossus proceeds destroy dining area , demeter s cabin before being infected apollo s hay fever plague , subsequently decapitated.
mechanical spiders – bunch of automaton spiders created hephaestus.
talos – talos giant automaton. percy, thalia, , bianca fight prototype of talos in junkyard of gods. apparently, has manhole @ base of foot servicing . bianca went in mess circuit defeat him. fell on power lines electrocuting bianca.


basilisk – basilisks small green snakes colorful spikes , poisonous bites , can breathe fire. in son of neptune, attacked camp jupiter, frank shapeshifts mongoose (or weasel) , scares them off.
buford – buford walking table leo valdez saved supply closet , prefers polished lemon pledge instead of windex. assists leo valdez in constructing argo ii in bunker 9. eventually, leo programs talking mini-hologram of gleeson hedge onto buford.
centicore – deadly antelope-like creatures known yale, tasked guard cave of trophonius. due endangered status, apollo goes great lengths not kill them soaks himself in waters of lethe , mnemosyne doing earn him wrath of gods.
cerberus – three-headed dog guards entrance underworld. in lightning thief, befriends annabeth. appears in last olympian when playing mrs. o leary. cereberus son of echidna , typhon.
charybdis – 1 of 2 monsters (the other being scylla) live on either side of narrow channel of water (the entrance sea of monsters). takes form of giant mouth swallows , releases water, creating whirlpools. described percy orthodontist s nightmare .
chimera – three-headed beast part lion, part goat, , has snake-headed tail. first seen in form of chihuahua. confronted percy atop st. louis arch alongside mother, echidna. overwhelmed creature , poisoned snake head, percy forced jump water far below escape it. disappeared after percy dove water.
clazmonian sow – flying pig appeared directly after hyperion defeated. percy defeats of blackjack, statue of hermes, , new york public library s 2 stone lion statues (that automatons).
colchis bull – colchis bulls elephant-sized, fire-breathing bronze bulls created hephaestus horns of silver , rubies eyes. in sea of monsters, of these bulls attack camp half-blood , defeated tyson. later used make tracks chariot race.
dragons – dragons large reptilian creatures have wings. used guarding things , younger drakons.

draco aionius – of these monsters attacked camp half-blood while percy jackson on adventures in sea of monsters.
ladon – ladon giant dragon 1 of offspring of echidna. defends hesperides apple tree. ladon poisons zoë nightshade in titan s curse.
peleus – dragon guarding golden fleece hangs on tree thalia within. possibly named after peleus: father of achilles.
python – giant earth dragon old enemy of apollo. in blood of olympus, python revived gaea during second gigantomachy , mentioned python reclaiming delphi 1 of apollo s many failures. in hidden oracle, apollo , meg mccaffrey in labyrinth overhear python talking nero plans control oracles.


drakons – race of giant serpent-like creatures several millennia older dragons. come in 3 different types: aethiopian, lydian, , maeonian. in demigod diaries story titled leo valdez , quest buford , unidentified drakon appeared in camp half-blood forest until ripped apart maenads.

aethiopian drakon – drakon terrifying green eyes originated africa. 1 being raised luke in sea of monsters. when 1 of bear twins seemed reluctant bidding, luke threatened feed him drakon. in battle of labyrinth, aethiopian drakon seen in cargo bay of princess andromeda.
lydian drakon – oldest , fiercest of drakons once attacked village of lydia. 200 ft. long drakon paralyzing stare in sheer terror , armor-corroding acidic venom. in last olympian, kronos unleashed upon manhattan killed many half-bloods before being killed clarisse la rue.
maeonian drakon – green , yellow drakon once attacked maenoia, turkey. in house of hades, maeonian drakon resides in swamps of tartarus. attacked percy, annabeth, , bob titan , killed damasen. damasen s curse slay maeonian drakon every day.


eidolons – race of spirits can possess demigods. in mark of athena, eidolons work gaea.
erymanthian boar – erymanthian boar giant boar, servant of pan appears in titan s curse. percy, thalia, zoë, grover, , bianca first encounter in cloudcroft, new mexico grover realizes potential form of rapid transportation.
feather-shooting bird – type of large black bird shoots feathers arrows. in demigod files , phobos summons them fight clarisse after steals ares war chariot.
fire-breathing horse – race of horses bred @ triple g ranch war purposes. shown pull ares war chariot.
flesh-eating horse – group of female horses bred @ triple g ranch. of them tried eat percy while cleaning stables.
flesh-eating sheep – race of carnivorous sheep owned polyphemus. guard golden fleece. described being big hippopotamus , attacking piranhas.
giant badger – giant badger. in last olympian, mentioned gleeson hedge tried fend off giant badgers , tried summon pan him that.
giant crab – giant crab might cancer. percy fought in princess andromeda during mission charlie. defeated stabbing soft tissue on belly.
giant eagle – giant-size eagle appears throughout heroes of olympus series. giant eagles used romans transporting , protecting roman demigods.
giant scorpion – giant-sized scorpion. daedalus (under alias of quintus) ordered giant scorpions triple g ranch , kept them in boxes in sword fighting arena. let them out in camp s forest game.
giant sea turtle – large sea turtle accompanied sciron attacking argo ii seen in house of hades.
giant snake – large snake. attacked tyson , grover when in labyrinth seen in battle of labyrinth.
giant squid – giant squid might kraken. among sea monsters in oceanus army.
gryphon – gryphon creature part eagle, part lion. known collect golds nests , lay golden eggs. gryphons appear in son of neptune seen in alcyoneus camp. not confused griffins of kane chronicles.

abelard - pet gryphon britomartis appeared in dark prophecy.
heloise - pet gryphon britomartis appeared in dark prophecy. lays egg while in commodus captivity , later killed during battle @ waystation.


hellhound – hellhounds main part of luke s army , monsters in general. described large black dogs have fire glowing in eyes. mentioned reside in fields of punishment. daedalus owns hound named mrs. o leary, who, unlike relatives, loving , loyal. in last olympian, bunch of hellhounds seen in kronos army snuck behind demigod lines.

mrs. o leary – mrs. o leary friendly hellhound ever exist. quintus (an alias of daedalus) original owner, but, after asking nico di angelo kill him, percy becomes hellhound s owner. while percy in mortal world , charles beckendorf takes care of @ camp half-blood. rescues percy while in labyrinth.


hippalectryon – hippalektryons endangered animal part chicken, part horse. in battle of labyrinth, seen @ triple g ranch.
hippocampus – hippocampi horses waist fish tail waist down. 1 said take liking tyson, , named rainbow. called fish ponies tyson.

rainbow – hippocamus befriends tyson in sea of monsters. loves give tyson rides on sea.


hydra – serpentine monster 9 heads. every time head chopped off, 2 new heads grow back. monster appears in sea of monsters life force linked monster doughnut shop, 1 pops every time hydra regrows head. destroyed cannons of css birmingham. in mark of athena, percy fights hydra when he, jason, , piper on mission rescue nico ephialtes , otis. in lightning thief film, creature takes form of 5 janitors (played tom pickett, keith dallas, v.j. delos-reyes, spencer atkinson, , tim aas) in parthenon replica in tennessee , refers himself we. hydra defeated use of medusa s head.
karpoi – spirits of grain size of toddlers. while many of them malevolent service gaea, children of demeter apparently capable of summoning karpoi, although 1 demigod has shown possess ability. in son of neptune, percy jackson, hazel levesque, , frank zhang encounter 3 karpoi.

peaches – friendly karpoi resembles pudgy human toddler green eyes , green hair. controlled meg mccaffrey.


keres – keres battlefield spirits of famine , disease feed on violent deaths. reside in underworld , support titans not assist them in last olympian. in demigod files story percy jackson , sword of hades, of them attacked percy, thalia, , nico. 1 of them poisoned percy, yet bob titan managed heal him.
katobleps – race of cow monsters appear in house of hades.
ketos – chiron mentions giant sea monster in titan s curse.
lemures – race of angry ghosts seen on multiple times in house of hades.
leucrotae - leucrotae creatures had body of red-furred lion , hooves , tail of horse voice mimnicry , can t harmed metal weapons forged either god or man. in demigod diaries story diary of luke castellan, luke , thalia trapped in halcyon green s mansion , encountered 2 leucrotae speak man s voice. 2 of them discovered leucrotae linked halcyon s thoughts. when thalia uses fire on leucrotae, halcyon sacrifices life luring leucrotae away luke , thalia can escape.
leviathan – these mentioned poseidon in last olympian giant sea creatures neutral in war between poseidon , oceanus.
lupa – lupa wolf raised romulus , remus. guides children of roman gods camp jupiter after left @ wolf house trains them become roman soldiers upon finding worthy ones. roman counterpart of chiron similar job greek demigods, more militaristic. appears in lost hero , son of neptune.
makhai – makhai spirits of battle , combat. in blood of olympus, asclepius used makhai , pylosian mint in order formulate physician s cure.
mania – mania ghosts personify insanity, madness , crazed frenzy. in blood of olympus, beryl grace , julian ramírez-arellano among mania.
myrmekes – race of giant ant-like creatures shiny things gold. in demigod files story percy jackson , bronze dragon, myrmekes trapped charles beckendorf in nest. in hidden oracle, apollo , meg come across trio of myrmekes kidnap meg, forcing apollo infiltrate nest , rescue her. later, apollo persuades mother ant mama him , other demigods return camp half-blood.
nemean lion – nemean lion lion 1 of children of echidna , typhon. has hard skin in no weapon can penetrate. luke , atlas sent nemean lion national air , space museum stop group of questing hunters , demigods. battled percy jackson, hard defeat because of bulletproof , sword-proof pelt. percy defeated throwing astronaut food mouth exposing 1 unprotected surface, mouth.
nosoi – nosoi spirits of illness, plague, , disease locked in pandora s box. in hidden oracle, bunch of nosoi attack apollo , meg mccaffrey until fended off them , karpoi peaches.
ophiotaurus – half-cow/half-snake monster. nicknamed bessie percy jackson assumed female, although grover later informed him male. percy saved trawler s net after being fetched hippocampi. bessie supposedly creature artemis hunting because destroy olympus. she/he appears in titan s curse , last olympian.
orthrus – two-headed dog owned geryon , brother cerberus.
pegasus – pegasi winged horses named after original mount of bellerophon born blood of medusa.

blackjack – pure black pegasus , percy s loyal friend. first introduced in second book sea of monsters on princess andromeda percy rescued him kronos s minions. ever since then, blackjack has felt has pay percy saving him , whatever percy asks calling him boss. seen in blood of olympus delivering athena parthenos camp half-blood.
guido – light gray , white pegasus friends blackjack. in last olympian, guido , porkpie aided percy , blackjack in battle of manhattan. guido later adopts reyna human after giant war.
porkpie – light gray , white pegasus friends blackjack. in last olympian , guido , porkpie aided percy , blackjack in battle of manhattan.
scipio – reyna s pegasus appears in son of neptune. nickname skippy because s color of peanut butter (the same color chestnuts). died @ end of house of hades because of gryphon strike.


pit scorpion – deadly type of scorpion appears in lightning thief. when luke brings percy woods , reveals allegiance kronos, summoned pit scorpion attack percy. tells percy should not go sword, pit scorpion can kill in sixty seconds, , can jump fifteen feet. when luke disappears, percy manages kill though managed sting him. wood nymphs percy recover poison.
scylla – 1 of 2 monsters (the other being charybdis) live on either side of narrow channel of water in sea of monsters. should ship sail close her, uses 6 heads pluck off crew members on deck , devour them. according clarisse (daughter of ares), scylla pick whole boat , crushed boat if crew hid below deck. in film percy jackson: sea of monsters, scylla mentioned clarisse have eaten ichneutae.
sea serpent – large serpent lives in sea. deimos seen riding 1 in demigod files story stolen chariot. in last olympian, sea serpent seen amongst sea monsters in oceanus army.

carthaginian serpent – giant serpent deadly venom guards entrance of commodus lair in indianapolis.


sirens – sirens dangerous bird women sweet songs lead many sailors deaths on jagged rocks. in sea of monsters, killed annabeth.
skeleton – skeletons undead troops make hades undead army. in lightning thief , hades has skeletons in army uniforms guarding palace. in battle of labyrinth , nico manages employ them part of ritual enable him call spirit of sister speak her. in last olympian, nico , hades manage bring troop of skeletons fight titans. later seen constructing cabin @ camp half-blood dedicated hades. in house of hades on demigods side , them in hades s temple in epirus.
skolopendra – sea monster 200 ft. long. looks cross between giant shrimp , cockroach pink chitinous shell, flat crayfish tail , millipede-type legs. face slimpy pink enormous catfish 2 glassy dead eyes , gaping toothless maw. has beard has numerous amount of tentacles sprouting each nostril. in mark of athena, ceto sents skolopendra after demigods after escape phorcys aquarium. attacked argo ii when leo forgot turn monster-detection system on. percy describes skolopendra shrimpzilla. skolopendra withdraws ocean when leo valdez , hazel levesque throw test tubes filled greek fire mouth.
spartus – troop of skeletons armed weapons. summoned planting dragon (sybaris) teeth in ground , watering them blood. in titan s curse, spartoi ambushed percy, thalia, zoe, grover , bianca in new mexico. due being child of hades, bianca managed destroy them. in son of neptune, frank (as gift father) given spear tip of dragon s tooth when planted raise 1 of spartoi, uses defeat basilisks outside of r.o.f.l. headquarters, kill of laistrygonians surrounding grandmothers house using final charge protect mortals on train attacking griffins.

gray – spartus can summoned frank zhang.


sphinx – sphinx monster head of woman , body of lion. percy jackson , friends encountered sphinx while navigating labyrinth. rather tell riddles, sphinx asked historical questions annabeth refused answer insult intelligence. not confused sphinx kane chronicles.
stymphalian birds – flock of birds once attacked camp half-blood in sea of monsters. percy , annabeth used chiron s music scare them apollo s cabin shoot them down. flock of stymphalian birds attack argo 2 in house of hades.
telekhine – telekhines race of dog-faced sea demons reforged kronos s blade in fourth book. set percy on fire in fourth book. appear in fifth book. in fourth book, referred telekhines. however, in fifth book, referred telkhines , without second e . may typographical error or different of author s choice. in mark of athena, telekhines seen in water tank @ georgia aquarium.
trojan sea monster – type of sea monster rampaged coasts of troy until slain heracles. known keto trois. in lost hero, jason grace claims have slew monster while fighting porphyrion of gigantes.
typhon – powerful monster. sired many monsters echidna. lives , sleeps inside mount saint helens. percy such powerful demigod wakes typhon during visit there. in last olympian, typhon awakes , moves across america destroying in path. concealed in mist, typhoon s appearance not described , appears freak storm. gods of olympus try stop him, powerful. in end, poseidon , army defeat him poseidon opened tunnel sends typhon tartarus. once typhon defeated, wave of anemoi thuellai born.
unicorn – horse 1 horn. herd of unicorns used steeds campers of camp jupiter. red-tinted lares head of wolf guards them.
venti – race of storm spirits born when poseidon opened tunnel sent typhon tartarus. depending on how chaotic are, venti can appear either smokey men angel-like wings or smokey horses. in lost hero, aeolus sent venti prevent jason, piper, leo, , hunters of artemis rescuing hera. greek counterparts anemoi thuellai.

dylan – ventus among venti attacked jason grace, piper mclean, , leo valdez seen in lost hero.
tempest – ventus in smokey horse form appears in lost hero. jason tames tempest can him fight porphyrion.






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