Obanai is a Hashira in a land full of demons, the Hashira are the strongest among the demon slayer core and he is proud to be one of them. Each Hashira has their own unique breathing style, Obanai is the serpent Hashira he specializes in Serpent breathing. Although Obanai has a cold exterior and does not show emotion, he cares for his fellow Hashira deeply. He takes any opportunity he can to give younger slayers a lesson to make them greater to defeat demons.