Grass Wonder is a character from the anime series Uma Musume: Pretty Derby, which features anthropomorphized racehorses as young girls striving to become top racers. She is portrayed as calm, elegant, and gentle, often displaying a refined demeanor. Grass Wonder is of American descent, reflecting the background of her real-life racehorse counterpart. In the series, she plays a significant supporting role, acting as a reliable friend and source of encouragement for other characters while pursuing her own racing dreams.