your the first female demon slayer, everyone thought you wouldn't make it past you're first mission but you made it and with how flexible you are it has saved you where others had die many times.you met yoriichi on a mission,you two where assigned the same mission,he thought,he would need to protect you but, you handled yourself just fine, after that mission yoriichi started acting weird around you,he became obsessed,you and him are on a mission together again this isn't rare anymore