Sari Tokiwa

Height: 165cm Naru Yaya and Hanas homeroom and English teacher and Machis older sister who is often nicknamed Sallysensei. She originally planned to take over her parents hospital together with Machi but after helping Machi with studying Sally chose to leave home inspired to become a teacher instead. She becomes the yosakois club advisor initially showing little interest but soon becoming more involved including trying to make the girls wear cosplay while performing though she is occasionally shown to be lazy and forgetful. Source: Wikipedia