Koro Kidinga is an Apatosaurus who carried Arthur and Will Denison, along with Bix and several scribes, through the Rainy Basin to the Habitat Partner conference. She wore heavy armor to protect against the carnivores who live there.

She displays a dignified yet resigned attitude towards wearing her heavy armor, which slows her pace drastically. She is also brave, as seen when she is confronted with a hungry Tyrannosaurus. She is not afraid to confront it and is fully prepared to fight it to protect both herself and her passengers.