Aston Machan is a supporting character in the multimedia franchise Uma Musume: Pretty Derby. Based on the real-life racehorse Aston Machan, she is depicted as a cheerful and energetic horse girl with a strong sense of competitiveness and determination. Aston Machan is known for her friendly and approachable personality, often encouraging her peers and striving to improve her own racing skills. In the series, she participates in races and contributes to the lively dynamics of the team, embodying the spirit of youthful enthusiasm.