|Appearances|| The Sea of Monsters (film) |
The Last Olympian
Rainbow is half-horse, half-fish, or a Hippocampus ("Fish Ponies" as Tyson calls them). Rainbow appears with two other hippocampi at the beginning of the quest, as a gift from Percy's father, Poseidon. They take Tyson, Annabeth Chase, and Percy Jackson to the Princess Andromeda, Luke Castellan's ship. Rainbow is sad to leave his new friend, and performs backflips with Tyson on his back trying to get him to stay. When that doesn't work he follows them to the Sea of Monsters, and rescues Tyson from the ship, CSS Birmingham when it explodes. He takes Tyson and searches the sea for Percy and Annabeth, finally finding them at Polyphemus' Island. Shortly after he rescues Percy and his companions, with the help of his fellow Hippocampi when Blackbeard's ship, Queen Anne's Revenge, sinks and takes them to Miami. After the quest Tyson rides him to the Cyclopes forges.
Rainbow is called near the East River when Percy is curious to know if Tyson is all right. When he learns about Tyson becoming a general, he asked if he would still give him apples to which Percy said yes. Percy asks Rainbow and his friends to carry them to Camp Half-Blood.
- Much like Percy has Blackjack, Hazel has Arion, and Jason has Tempest, Tyson has befriended an equestrian creature on a quest.
- Rainbow is also the only equestrian creature met so far that is not scared or afraid of Tyson because of him being a cyclops.
- Tyson named him Rainbow because of its colors.
|Species:||Centaur | Cyclopes | Dragon | Drakon | Empousa | Giants | Harpy | Hyperborean Giant | Ichthyocentaur | Karpoi | Laistrygonian Giant | Pegasus | Skolopendra | Stymphalian Birds | Telekhine|
|Friendly Monsters:||Argus | Blackjack | Briares | Chiron | Don | Ella | Festus | Gleeson Hedge | Grover Underwood | Hippocampus | Mellie | Mrs. O'Leary | Ophiotaurus | Peleus | Scipio | Tyson | Tempest|
|Enemy Monsters:||Agrius and Oreius | Arachne | Basilisk | Charybdis and Scylla | Chimera | Chrysaor | Clazmonian Sow | Colchis Bull | Echidna | Euryale | Geryon | Joe Bob | Kampê | Manticore | Medusa | Minotaur | Nemean Lion | Polyphemus | Sphinx | Stheno | Typhon ||
|Neutral Monsters:||Cerberus | Erymanthian Boar | Gray Sisters | Gorgons | Furies | Flesh-Eating Horse | Gryphon | Hippocampus | Siren|