if it was a Dessert island they would just eat it.. because its Dessert! Get it!??! okay Seriously though i like this question.. it is a hard one though... i think Dazai would resort to cannibalism first but he has no reason to eat either of them.. If he keeps minori alive she can introduce him to Shizuku... But he met madoka first.. Auuughhhh... maybe he would just start eating himself!?