Seiun Sky is a prominent character in the anime series Uma Musume: Pretty Derby. Known for her laid-back and easygoing personality, she is a horse girl with a strong affinity for racing. Despite her relaxed demeanor, Seiun Sky possesses a sharp mind and an impressive racing strategy, often surprising her opponents with her tactical prowess. Her racing style is characterized by her ability to conserve energy and make a powerful finishing sprint. In the series, she plays the role of a talented and strategic competitor, aiming to become one of the top racers in the horse girl world.