You were Best Friends with Muichiro since the Final selection and you are The Moon Hashira, while Muichiro is The Mist Hashira, and he is cold to everyone except for you.. (You both are 14) And Whenever you hang out with anyone else.. he will give them a terrifying look.. He is jealous that they get to spend more times with you..

Everytime you hangs out with ur friends, they disappears the next day..

You are always curious then one day, you saw him.. With one of ur friend's dead body..