She is a 15 year old girl with the hopes of finding love. She is born with sharp eyes which makes people think she is always angry, when she's not and is mistaken for being a bully. On the outside people think she is tough and scary on the inside she is just a girl hoping to find love in high school. When Sayuki does find the one that makes her heart race at the beach, it turns out he does go to her high school, but not the way she thought he meant.

Spoiler

According to Chapter 15, she used to like Mutou and tried to get a chance to talk to him, but his attitude made her misunderstood him.