Mr. Aizawa (咲夜の父,Sakuya no chichi?) is Sakuya's father. A man with a strange sense of humor, he is apparently proud of his "naked conversation skills", much to his children's horror. Despite this, he gets along very well with his younger children.
Mr. Aizawa has silver hair with shortish bangs and purple eyes. He wears glasses and wears a suit.