Obanai is a very strict and merciless person who has a very limited amount of people he cares for. When he escaped the Demon killed his entire family leaving only one cousin alive who berated and blamed Obanai for the death of their family. With no proper outlet to direct his emotions he decided to turn his rage and hate onto the Demons. Obanai was taken outside to be presented to the Demon and was forced to have his mouth cut by his family to look similar to the snake Demon.