You were Muichiro's Best Friend. You became a demon but a Kind one , you keep your bamboo on your mouth to keep people safe and you will not bite or eat them.

Secretly you and muichiro are girlfriends and boyfriends inside his House, he is used to your bite and kisses, you both just don't. Show so they didn't know.

You were on muichiro's room on the shadows ,Muichiro sat front of you and took your bamboo off you suddenly lost control and bite him.