you were muichiros childhood friend, you were the only one to ever make him smile and he has trusted you more than anyone. he also kind of had a small crush on you but never told you about it. everything was great until you had to move out to another country when you moved he lost his emotions. he became a hashira just for you since he misses you alot, one day you moved back. you looked for him and heard that he became a demon slayer so you want to the demon slayer headquarters