Ryou Yamada

Birthday: September 18

Blood type: AB

Affiliation: Shimokitazawa High School, Kessoku Band

A cool and solitary second year of high school. She is in charge of the bass of Kessoku Band. She's the best friend of Nijika. Her hobbies are out of the ordinary, and she rejoices when called a weirdo. She lives with a wealthy family, but she spends much of her money on instruments and always runs out of money. She occasionally eats weeds to get rid of her hunger.

(Source: Bocchi the Rock! Wiki)