Umiri Yahata is a first-year student at Hanasakigawa Girls' High School. She goes by the stage name Timoris and is the bassist of Ave Mujica. She also manages the band members' schedules.

She is a minor character in MyGO, however she does play a vital role in the show, on top of that, during the last episode, her band performs a song, so it will also be expected of Ave Mujica members to sing as well. Here is an example of her speaking. (turn on English subs for video!)