Koyuki is a first year student at Touou Academy and the choreographer for the school idol club.  She enjoys ballet, spending time with her best friend Ryo (a third year student at Touou) and making mascots! Her birthday is Febuary 23rd, making her star sign Pisces. Her main attribute is Smile.

Koyuki has a calm, soft. and approachable tone to her voice. She is very well spoken, and very well mannered, which is easily portrayed in the clear and polite tone she speaks in. Her singing voice is mezzo-soprano, more on the high end, which is soft, elegant, and very smooth, and mature sounding for her age.