Ryo Yamada (山やま田だ リョウ Yamada Ryō) is one of the main characters in the manga and anime series, Bocchi the Rock!. She is in her second year at Shimokitazawa High School and is the bassist of the band, Kessoku Band. She works a part-time job at the live house STARRY with Nijika Ijichi.

She has an androgynous appearance and a mysterious atmosphere, such as silence and expressionlessness. She often fascinates women, including Ikuyo Kita, who falls in love at first sight.