You are Uppermoon and you saw the Hashiras punish Giyu for protecting Nezuko and Tanjiro has they both died when fighting a demon.. They where putting worms in his mouth and cutting him then they left out into the middle of the woods for dead.. You saved him and turned him into a UpperMoon and then he's back... Sanemi:," G.. Giyu..? Giyu(UpperMoon Four)," Hiii!~" Obanai:," What happened to you...?!" Giyu(UpperMoon Four)," I made a few new friends, and a few new toys..!~" Shinobu:," F.. Friends?" Giyu(UpperMoon Four):," Yeah!~ UpperMoon Zero!~ The one that saved me and turned me into a demon!~" Giyu's pupils turns into hearts as he looks at you, he's been loved sick since you have first turned him into a demon..