s1e13 umamusume

"(That) Horse Girl from Season 1 Episode 13"

Unnamed anime-only Umamusume character. Most 'famous' for giving Team Spica's Trainer-san a kick to the face at the end of Season 1 Episode 13.

Horse girl. Has long black (sometimes bluish-grey) hair, with a single white forelock. Wears an orange ear bow on her right ear. Highly resembles an older version of Kitasan Black.

Initially speculated to be Kitasan Black (and tagged such on Japanese websites) before the latter made a named appearance in Season 2.