A horse girl with long, beautiful light-blue hair. She is a young lady of the prestigious Mejiro family, known for producing many elite racing horse girls, and is the younger sister of Mejiro Ramonu. Her personality is frank and approachable. Her gestures, tone, and demeanor are soft and refined, characteristic of a high-born lady. While she is the picture of a pure and traditional lady, her passion for racing is stronger than anyone's. Perhaps because her frail health limited her exposure to the outside world, she can be seen enjoying herself like an ordinary girl whenever she goes out. Height: 162cm Measurements: B87 / W56 / H85 She dotes on her trainer intensely, though she struggles to express it openly.

A cute girl with bobbed white hair. She is a 'Umastagrammer' in constant pursuit of cuteness, never failing to take daily selfies. She calls the trainer 'Onii-chan.' Having known him for a long time, she viewed their reunion at the Tracen Academy as a fated encounter and has become deeply devoted to him. She constantly tempts the trainer with her devilish words and behavior.