look up axetale,it'll make more sense)

when the hunger struck,the duo of sin and hollow tried to help others,sin more particularly,getting injured more then once,even losing a eye,but soon he succumbed to the hunger,hollow tried to help,but soon willingly gave himself to sin.After sin has eaten his friend,his mind shattered with the guilt of his actions,so to prevent him from eating,he sowed his mouth shut,h now wears his fallen friends hoodie,and wonders the underground,killing strong monsters,to try feed the weak who can't hunt...

note:his scythe now has the head of hollow on it,with the blade coming out of it)