Takano Shiina

Takuto's little sister, a girl who rarely shows emotion openly. She is somewhat eccentric, her humor often off-base or ecchi. She is somewhat bookish and enjoys reading for the sake of reading. However, she is very attached to her brother, despite her lack of overt emotion.

Spoiler

She is in actuality the reincarnation of Izanami, the creator goddess of Shinto myth.