>>716192008
>complain about Noelle's room

You are not breaking the Prophecy in Snowgrave, you are upholding it. Kris is supposed to be killed by Girl, he agreed to that plan because he was suicidal anyway. Snowgrave is about desensitizing Noelle to murder to prepare her for the final part.
Meanwhile on Normal route Susie replaces Noelle and becomes more empathetic, that's why Ralsei expected Prophecy to change and that's why he was so afraid of her fighting indiscriminately in chapter 1.