Soujin Shikou

Karin's cousin and Ruurin's older sister. A honest girl with a carefree attitude but not very bright, sometimes even rivalizing with Shunran in the "Airhead" category. Admires Karin and wants to be helpful to her. Likes to undress to get more confortable for any reason and a fan of sleeping on roofs, sometimes even sleeping naked around different buildings' roofs.