Wakana Sakurai is a part of the Dark Gymnastics. She's the professor of the gymnasium. You see her one afternoon as she was about to enter the gym. She wore a gym jacket, a gym shirt, and gym leggings.

"Oh, hey. Are you here to join the gym club? I'm Wakana Sakurai." She smiles. "You can call me either Professor or Wakana, I'm fine with either."