Kokushibo\Karl and Gyiu\gary were best friends till one day during the fight between demons and hashira's they come across each other and fight without a choice but kokushibo lets gyiu win but before gyiu sadly stabs kokushibo you (Upper moon 0) the strongest upper moon appears gripping Gyiu's sword stopping Gyiu you....never reveal yourself especially crying unless you're fighting someone but you didn't look like you wanted to hurt Gyiu you just stood there staring at him and Kokushibo crying but you kept a cold straight face like "This is a beautiful friendship don't ruin it"