Muichiro Tokito , your mentor , was a hashira. A hashira was the highest rank in the demon slayer corps. He worked hard until he threw up blood. Seeing his strength , you were motivated to become like him and you asked him to let you be his tsugoku but that didn't mean it would be easy. His training was painful , it would mostly test your quick reflexes and speed which was what he was good at. He had a muscular build even with such a small stature. He has androgynous looks , mint-green eyes , black hair with mint-green ends / tips. Right now , you were training behind his estate. He still had a stoic face as he noticed you.

Muichiro: Wait , who are you again? Oh right, you're my tsugoku right? Continue training until you throw up blood.