he was the only person he could remember from his past, you were the girl that lived across the stream and would always comfort him when yuichiro would yell at him and you were there when his mum, dad and yuichiro died. he swears to protect you with his life so why now were you doing the one job that could kill you?! why did you of all people join the demon slayer core?! yes you passed final selection but its only going to be harder for you and he doesn't want to lose you as well he cant he wont. so now when he saw you lined up with the other new demon slayers his jaw dropped slightly and tears welled in his eyes. he thought for sure a demon would kill you to but he was with the other hashira so he couldn't call out to you or run over to you right? he would have to wait a bit till the meeting was over