Mayu Tobita is a young actress, Sana's age. They along with Ayano Hanamaru Koji Tomomi all meet and perform in a drama together, but Mayu, being highly competitive, regards the other two actresses as rivals. She is extremely jealous of Sana's friendship with Naozumi, whom she both idolizes and wants to date.

The three girls appear at Zenjiro's birthday party, and completely steal the show from even himself. They show they can put their differences aside for everyone else's entertainment, though Mayu still loathes Sana's over-chipperness. She along with Ayano appear in the non-canon episode One More Song 3-2-1 as a police officer.