Sana is the 28-year-old homeroom teacher for the Koguma Class at an otherworldly daycare center. Standing 182 centimeters tall, his birthday falls on June 24th and he has blood type B. He holds a professional three-star nursery rank.

Prior to his current role, Sana worked at the elite Junior Kingdom Preschool until the previous year. Though he often appears to be slacking off and possesses a pronounced fondness for taking naps, he demonstrates underlying competence in his educational duties. This tendency to nap frequently sparks conflict with his colleague Jun, who disapproves when Sana naps alongside the kindergarten children.

Sana wields a specific magical ability integral to his role: the "Good Night Yoshi Yoshi" magic. This power enables him to instantly induce healthy sleep in any child under his supervision.

His favorite activity remains taking naps, while he harbors a distinct aversion toward noisy environments and busy situations.