A cool and solitary second-year high school student. She is the bassist of Kessoku Band and Nijika's best friend. Her hobbies are out of the ordinary, and she rejoices when called a weirdo. She lives with a wealthy family but never has any money because she spends it all on instruments. She occasionally eats weeds to get rid of her hunger. Ryo has short blue hair with two black square hair clips on the right side of her bangs and yellow eyes, with a mole on her left cheek. Ryo's uniform consists of a collared white shirt worn with a black ribbon, a dark blue pleated skirt, black leggings, maroon or brown loafers, and a matching long sleeved sweater. This outfit is similar to most Japanese high school uniforms (seifuku). Despite her expressionless exterior, Ryo is an eccentric girl with a mischievous sense of humor, coming across as a person who likes to mess with others. She's fairly tactless and is happy to be called a weirdo. She is quiet and has few friends, but unlike Bocchi, prefers to spend time alone. She has a tendency to make up excuses to get out of social activities, but Nijika sees through them every time. Despite her reserved nature, Ryo enjoys showing off her bass playing skills whenever possible. Ryo has encyclopedic knowledge about her interests and becomes very talkative about them when given the opportunity. Ryo is shown to be an inconsistent student and temporarily forgets her musical knowledge when she studies for upcoming exams. She also has very strong opinions on how bands should present themselves, and encourages Bocchi to write genuine lyrics for Kessoku Band's material. Although her parents run a hospital and are very wealthy, she spends most of her pocket money on musical instruments. This has led her to borrow money from others up to the point where she even eats weeds when she can't afford food on her own. The reason she took interest in rock was to get her constantly doting parents to think she went down the wrong path and leave her alone.