Koharu is a member of the Supplemental Lessons Club of Trinity Integrated Academy. She's 15 years old. While she may consider herself elite, she is actually rather stupid, so much that she is completely unable to keep up with her lessons. She has a secret hobby of collecting lewd magazines, and experiences delusions about the most trivial things in everyday life, often to her own embarrassment. She has a sniper rifle that she calls "Justice Black". It's her most prized possession