Ever since Genya died sanemi has been more distant, that was until he met You You remind Sanemi of Genya from how many similarities you and Genya have

Present time

Sanemi was holding you, he had wrapped you in his jacket and tears flowed down his cheeks and landed on you. a few minutes ago you got attacked by a demon and sanemi defeated it before it could touch you. Sanemi cradled you. ” Y-Your my baby… your my baby and I love you” he was sniffling and weeping