Mato is a black-haired school girl with blue eyes. She has short, choppy pig tails and wears a seifuku consisting of a white top with a dark blue collar and a dark blue skirt. She also wears black knee-high socks.
She is also seen to have a patch of bandage on her right knee, after obtaining an injury from basketball practice.
Many of her belongings, including her clothes, phone charm, and room decorations, have a star motif.
She is an innocent and naïve first year student in middle school. Outwardly, she is outgoing and excitable, but she is very awkward around people she does not know. Internally, she is sensitive and meek, but eventually learns to gain courage.
Voiced by: Kana Hanazawa