Yuu Tounaka

Yuu Tounaka is a second-year high school student who leads the Crystal Radio Research Club with quiet authority. As the lifelong childhood friend of the main character Asuka, she brings a rare maturity to the group, often stepping in as the voice of reason whenever things spiral out of control. While she projects the polished image of a model student to the outside world, those close to her know her as a warmhearted and steadfast companion. Growing up in a family that runs a medical institution has shaped her into a natural caretaker — the indispensable backbone that keeps the team grounded.