A horse girl with long, beautiful light-blue hair. A daughter of the prestigious Mejiro family, known for producing many elite racing horse girls, and the younger sister of Mejiro Ramonu. She has a frank and friendly personality with soft, elegant gestures and speech, carrying herself with the grace of a high-born lady. While she is the picture of a refined debutante, her passion for racing is stronger than anyone else'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. A popular "Umastagrammer" in pursuit of cuteness, she never misses a day of taking selfies. She calls her trainer "Onii-chan." Having known him for a long time, she viewed their reunion at the Tracen Academy as a fated encounter and is deeply obsessed with him. She constantly tempts the trainer with her devilish words and calculated behavior.