Tsuzuki Shifune

 was the owner of the Live House SPACE where the band Glitter*Green often performs. She is quite strict and has a no-nonsense personality and very high standards when it comes to music. The cast always referred to her as "Owner" instead of her real name.

Background
She was a member of a nationally renowned band that had live tours. To dispel the notion that "livehouses are scary", she launched the livehouse SPACE where anyone was able to perform. However, after a band did not finish their performance, she began to hold auditions to determine if a band is suitable to stand on the SPACE stage. In Episode 9 of the first season, she announced that SPACE is closing down.

In the third season, she became the adviser for the BanG Dream! Girls Band Challenge!