Mato Kuroi 黒衣マト

Mato takes an interest in and speaks to a girl she sees the first day, Yomi Takanashi. They became best friends.

very awkward around people she does not know. Internally, she is sensitive and meek, but eventually learns to gain courage.

of bandage on her right knee is gone, though she now has a bandaid on her right thigh. She is fond of philosophical musings, and often will vaguely say something that she sees (for instance, remarking "blooming" when seeing a patch of flowers) to no one in particular. Saya also describes her as the kind of person who has, until now, never hated anyone or have anyone hate her. Her favorite food is said to be curry.

She is very fond of the book Li'l Bird Li'l Bird Colorful Colors and reads it repeatedly.