Shiraishi is Natsuki Mogi's classmate. She was the one who revealed to Takumi Fujiwara that Natsuki was engaged in an Enjou-Kosai relationship with an old man in a Mercedes-Benz. It is later revealed that the man is her father. She wears glasses and has black hair tied in pigtails. She has a crush on Takumi, and gives him chocolate on the last Valentine's day before they graduate.