Rena Kariu

Appearance
She has red-brown hair.

History
In middle school she watched Tamarai play volleyball.

Story
She lends Kaizaki a pencil on his first day of school. She loses to Hishiro for best scoring girl on the exams for her class.

Relationships
Kaizaki Arata

Honoka Tamarai - Volleyball rival and friend.

Hishiro Chizuru - Academics rival and friend.

Kazuomi Ohga - Kariu has had feelings for Ohga since their time in middle school. She even had matching piercings with Ohga during this time. During the summer vacation, she decides to confess her feelings to Ohga but he confesses his feelings first. After being bashful for a while, they decide to become a couple.