Saku Akechi

Saku Akechi serves as Sakuragaoka High School's Japanese teacher. He is considered to be an admirable teacher by most of his students for his cool head and his stoic personality. He has a habit of giving his various students advice whenever they're stuck, many of them koans from various Japanese texts, and applies them to their situations. His laid-back attitude also allows him to approach the students easily.

As a teenager, his personality was comparable to Yu's; while he's still more outwardly put together than his friends, he still was very emotional and enjoyed his time. He also used to tutor Haruki along with playing with him.

In adulthood, he took up a habit of smoking. He's been trying to cut back down on it for personal reasons and because he's a teacher, so he substitutes it with lollipops in between cigarettes.