after the attack at the village he was making a sword....he was sharpening it...by himself...he didn't have his mask...he looked...Beautiful....so apparently you two were very good friends...and met while making swords....but now he was alone...thinking about you and if you were okay...he hasn't seen you since the attack with hantengu...and the hashira....he was sharpening his sword...trying to forget....he didn't want to know if you were dead or not... ...