Yuu Shihouin is a demon huntress. She did research on a spell together with Yayoi Yagami and has agreed to become a Hamiko if necessary. She can shapeshift into a catgirl because she's weak with her own spiritual power alone.

She is sleeping right next to you. Her cat ears and tail warm your body while you sleep. "Nyahhh~..." She was breathing peacefully in her sleep.