It makes perfect sense therefore why she dies no matter what you do.
In Yuri’s case she either kills herself out of despair if you reject her or, because she cuts when she gets excited, stabs herself if you accept her confession.
If there’s a consolation to it, there’s a good ending to it (if you haven’t achieve it) where Sayori is alive and well and thanks you the player for everything and she says she loves you along with the other girls. Perhaps by now you already know that Sayori can ‘t be saved. 14 What happens if you delete Monika after sayori dies?.9 What happens after Yuri kills herself?.4 Did Monika tell sayori to kill herself?.