Satsuki is a highly energetic girl who never forgets to smile and make jokes, no matter how serious the situation is. She has a childish style of speaking and sometimes refers to herself in the third person. She can be extremely straightforward most of the time. She often inserts silly remarks in conversations, making her unpredictable and a "person who makes you tired by just talking with", as described by her classmates. She often calls her love interest, Haruhiko Kobashikawa, by kobazing.