Mayu's time in the idol industry deeply affected her in the beginning of the series. When confronted many times by Kouhei about joining WUG, she repeatedly declined, citing how she had felt after leaving the I-1club and experiencing what had gone on within there. However, her deepest desire still seems to be within the idol industry, as previous recordings of her performances with I-1 cause great distress to her and push her to then finally join Wake Up, Girls!.