Haru Urara was a real Japanese racehorse who became famous in the early 2000s for losing all of her races yet never giving up, turning her into a national symbol of perseverance. Cygames later reimagined her as an endlessly optimistic horse girl in Uma Musume Pretty Derby, first in the 2018 anime and the popular mobile game. Clips of her voice lines spread through fan edits and soundboards because fans connect the cheerful delivery to her real underdog story, keeping the sound popular with anime and Uma Musume audiences.