Kaoru Matsumura (
Kaoru is a slim girl with rather large breasts. She wears glasses and has very long hair which she fashions into twin braids. When participating in the 15 second Dead Tube competition she wore her long hair styled in two braided loops.
Kaoru is something of a Katana-otaku, going so far as to name her weapons and talking about them passionately. She had no qualms about murdering middle-schoolers and excuses her actions as being that of a normal hard working student.
In chapter 28 Kaoru makes an appearance as she cuts down a middle-school girl, severing her head and killing the younger girl. She is chased away and decides to take a bathroom break, where Mai finds her and defeats her with a German-suplex.
Later in chapter 34, she appears again, the only survivor or her Deadtube team she is shown worrying about how she will make money.
- Whenever she feels stressed out she has a habit of having to use the bathroom.
- She loses her virginity in chapter 37
- The kanji spelling of her name changes between chapter 34 and chapter 35.