Enishi Yukari

She is the manager of the gym and the resident masseuse in the relaxation room. She is the sister of the swimming coach who took care of Kento in college. Her husband is also a former swimmer, and was his wife and trainer. The reason I say "was" is that her husband was in a traffic accident just like Kento, and unfortunately, he passed away.

That was 10 years ago. Since then, she has been working at this gym, and appointed as manager of the branch.