Ritsuka Kawashima

Mari's friend and classmate. She is often seen with Mari and Ayano, and although she is the smallest of the three, she has a caring nature. She has known Ayano for a particularly long time, and always looks forward to reading the novels she writes. She is like a big sister to everyone, encouraging those who are unsure. She has a lively and energetic demeanor, and her hobby is baking sweets.