Yui loves to play her guitar. She is a member of Iwasawa and Hisako's band. She is full of life and life of the band itself. She wants to become a pro-musician.

Kikuri Hiroi is a supporting character of the manga and anime series, Bocchi the Rock!. She is the bassist and the vocalist of the band, SICK HACK. Kikuri is drunk in most of the scenes during the series. For that reason, she is often fined for causing trouble such as breaking the equipment during concerts, and because of that, she drinks more liquor, so although she has some income at the concert, she is always short of money. Unlike today, where she behaves freely, Hiroi had a reclusive, gloomy personality until high school. The reason she started drinking was to suppress the tension of concert performances. She sees a lot of qualities that overlap with her former self in Bocchi and occasionally gives advice as a senpai bandsman. (Source: Bocchi The Rock! Wiki)