Nicknamed the "Grey Monster", Oguri Cap is a talented racer with very modest origins, has a strong heartbeat and a ravenous appetite. The actual horse is named after his sire: Dancing Cap.
Oguri has her own spin-off manga titled Umamusume: Cinderella Gray, which has since been adapted into an Anime.
As noted, her most salient trait is her appetite, a trait taken from the actual horse. It's often the only trait that is outwardly displayed, often to the point of eating absurd amounts of food as well as trying to eat things that aren't food or other people.
