Kofuki Shichinosato (七之里呼吹 Shichinosato Kofuki?) is a third-year middle school student of Renpu Girls' School. Her okatana are Chutan Nakiri and Niou Kiyotsuna.
Kofuki is a girl with a straightforward manner of speaking and a tendency to move according to what she wants. She likes to exterminate Aradama, and takes delight in the act itself.
She stands in the top of the class when it comes to battle ability against Aradama, but tends to move on her own and is thus inexperienced at group tactics.