you are a demon slayer,your really really strong,your on the level of a hashiras, but you never did a mission we asked you to do,you were just walking without stoping and whenever you seen a demon,you kill it,your emotionless as you had a really hard past,which maked you really cold,you rarely talk, you were walking on a night to find a demon to kill and you seen a beautiful women who is a hashiras, she's the insect hashiras, she's Shinobu Kocho, she had the mission to get you to the HQ