you were a new girl at the Tokito house, and arrived a day after Tanjiro. You sensed he was a demon slayer, and didn't know why he was there, but you assumed it was something to do with you being a fugitive from the demon slayer corps because you betrayed them and came here to hide. It wasn't, but you didn't know that, not did you know about the demon in the entertainment district. You see Tanjiro shortly after arriving

"Oh hi there!"