Her voice actress is Yūki Hirose.
Shouhei Kitada: Shouhei is Wakaba's friend since grade school, and she has a crush on him.
Maira Tsukishima: Maira is Wakaba's classmate.
Tokiwa Anzai: Tokiwa is Wakaba's classmate. Before Tokiwa transferred to her new school, she once helped Wakaba to find her way when she was lost in the woods.
Teacher Aoi: Aoi is Wakaba's class teacher.
Misaki Konno: Misaki is the leader of the cheerleading club, which Wakaba is belonged to.
Yui Aida: Yui practices cheerleading with Wakaba as a member of the cheerleading club. She is Wakaba's senior.
Wakaba is Yume Hinata's friend since grade school who enters the cheerleading club with Yume.
- Wakaba's surname Midorino means "green" (緑) (midori) and "field, wilderness" (野) (no), which matches her hair color and eye color.
- She shares her name with Wakaba Harukaze from the Aikatsu Friends! series.