Mutsuki takes after his father's hair color and his mother's eyes. He has near shoulder length hair with bangs covering most of his forehead.
He is often seen wearing a sweater on top of his uniform.
Mutsuki is a charismatic and calm student council member. He seems to take after his paternal uncle, Ayame, and his father's family member Shigure. Unlike Yuki, his personality is outgoing and often joking. Mutsuki appears to sport some kind of rivalry with Hajime Sohma (son of Kyo Sohma and Tohru Honda) although nowhere near as intense as that of Kyo's and Yuki's.
Role in the Story
In the beginning of the story, Mutsuki saves Sawa Mitoma from the admonishment of Principal Takei Makoto. It is later revealed that Mutsuki is Vice President on the student council (under Hajime). He continues to help Sawa when he can.