Hibiki Tsukahara

Hibiki is a best friend of Haruka who knows her well. She takes care of Haruka, even by giving the cold shoulder to a boy who was following Haruka. She is proficient in both literary and martial arts, and is a captain of the school's swimming team. Hibiki is admired by junior swimming team members. However, it's hard for her to smile, and she is worried that other people can see her face as scary.