Makoto Oono  

, 大野 真

Hina and Natsumi referred to someone as Oono-senpai, who is the second in command at the breakwater club. She's known for being incredibly reliable and taking on a maternal role towards all of the members. Her father is a fisherman, so she has extensive knowledge about fish, cleaning, and preparing them. In fact, she acts as the de-facto chef of the club. Despite her fear of water due to not being able to swim, Oono doesn't let it stop her from fishing or enjoying time at the club. The President even said that she would make an excellent wife one day, which made her blush.