桐山 遼

A senior colleague at the company where the protagonist, Yuki, works. Ryou is one year older than Yuki and his peers.

He has a bold and caring personality, which makes him popular among his juniors, including the protagonist. He is also competent at his job. While serving as Yuki's mentor, he consistently delivers excellent results himself.

During Ryou's student years, he was heavily involved in sports. Even now, he maintains a well-built physique through regular exercise.