T.M. Opera O

A horse girl with chestnut short hair styled in an outward flip, and a crown-shaped accessory as her trademark. She is affectionately called "Ope" or "Opera O." Her roommate is Biwa Hayahide. She refers to herself as "Boku." She claims to be the "world's strongest, fastest, and most beautiful genius horse girl," essentially a narcissist. However, she possesses more than enough talent to back up her claims and is dedicated to rigorous training inspired by opera. She aims to become the "Emperor of the Century's End," striving to inspire courage and hope in the audience by achieving great victories in races. She is considerate of the timid Meisho Doto and sometimes accompanies her in parallel runs. There is also a depiction of her viewing Fuji Kiseki as a rival.

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One of the main characters. Her theatrical speech and confident demeanor are the same as in the game. To make it in time for the Satsuki Sho, she imposes a harsh rotation on herself, enduring pain throughout her body, and rises from the winless races to become a formidable rival alongside Narita Top Road and Admire Vega in the classic race scene.