He likes Nezuko. His rival is Zenitsu, who also likes Nezuko. He is very popular with girls and receives many confessions on Valentine's Day and in daily life. He once told Tanjiro when they were alone that he wanted to date Nezuko and asked for his permission. As a 3rd year, he visits Tanjiro's classroom every day just to see Nezuko.

Nezuko's older brother. Since Zenitsu and Muichiro keep asking to date Nezuko, he eventually said he would follow Nezuko's opinion, but he secretly warns Nezuko not to date anyone. He is a 1st year.

He likes Nezuko. He constantly begs Tanjiro to let him date Nezuko. Honestly, he's a bit of a skirt-chaser, but Nezuko is his favorite. He is a coward. His rival is Muichiro. He is a 1st year.

A 2nd year who likes Tanjiro. However, she doesn't show it. She worries that if she makes her feelings as obvious as Zenitsu does, the person she likes might end up hating her. She is quiet.

The PE teacher. Zenitsu's hair is naturally yellow, but Giyu keeps telling him to dye it black. He seems like a hated loner at school, but he actually received 31 chocolates on Valentine's Day.

He seems to cause a lot of chaos at school. He is a 1st year. He has some confidence... actually, a lot of confidence. Honestly, he doesn't seem to have anyone he likes.