Kanako Sasa, usually referred to by her surname, is a girl who is a fifth grader in Shuichi's class at the beginning of Wandering Son. She is sometimes called Kanabun (カナブン?, lit. drone beetle) by her younger brother and Chizuru. She makes her first appearance in chapter two of the manga, but is not named until volume two. She is a short, energetic girl who thinks of herself as everyone's friend and becomes distressed when her friends fight among themselves. She is childhood friends with Chiba, Takatsuki and Nitori. Sasa acts as a mediator between her friends in such times and tries not to leave anyone alone. As they grow older, the friends become increasingly distant. She eventually gets caught in the conflict between Chiba and Takatsuki over their romantic conflict with Shuu.
She has been friends with Yoshino since pre-school, and later becomes close with Chizuru. Sasa is an innocent, childish girl who does not have many worries aside from her friends' quarrels. She tends to be a handful for her mother, who picks out her clothes for her and even helps her get ready for school in the morning. She mentions that if she thinks too hard about something, her brain becomes itchy.
Kanako Sasa has brown hair that is usually kept tied. She wears her hair in a little girl's hair style called, " Twin Tails ". She looks a little similar to Chiba.