Birthplace: Hiroshima

Birthday: November 16

Height: 150 cm

Weight: 41 kg

Blood type: A

Sizes: B79/W56/H81

A classmate of Haruto and Yuzuki, she is a demure and timid girl with braided hair and donning a pair of glasses to hide her actually beautiful appearance (similar to Honoka Sakurai of Suzuka in mannerism and appearance). She is very adept in sewing and admires Yuzuki. Kotone develops a crush on Haruto. During a class outing to gather apples for the festival, Kotone arrived with her hair unbraided(because of a comment made by Haruto)and Haruto thought it looked nice on her. She replied that if he likes it, she'll leave her hair unbraided from now on. When Haruto is rebuffed by Eba again at the end of the outing,there is a slight misunderstanding that leads her to hold Haruto's hand and confesses to him. Haruto notices the misunderstanding between each other and she again misunderstands and says that she will wait for a proper confession at the festival. However, after witnessing Haruto drag Yuzuki away from the festival to talk, she seems to realize that he truly does like Yuzuki. Recently, it was revealed that she started dating Himuro.