>>723137997
I think it might be more reasonable to assume that the magical burst of evil nightmare shit that rushes over the room as soon as we reveal ourself to Noelle could indicate that we're asserting ourself over Kris more than normal and they can't do a goddamn thing about it
Our usual level of control affects Kris to the point that their close friends and family notice that something is off about them, they sound different and they don't have the freedom to do things like play the piano to the best of their ability. We are capable of relaxing our control enough to let Kris play the piano freely, it is necessary to do so to progress through Chapter 4.
We can also go in the other direction and clamp down on Kris harder, enough that they can no longer resist us. We can take away Kris's voice and speak through their mouth. This is the "terrifying voice" that Noelle hears during Snowgrave and resurfaces when we reveal ourself to her in her room. It's not the way that Kris's voice is usually off when we're controlling them (Noelle isn't terrified when we talk to her at the Church, or later if you abort the route), it's the voice of the SOUL using Kris as our vessel. As Chara would say, we are the one in control. Kris can resist us as much as we allow them to do it. When we're determined to make them do something, there's nothing they can do to stop us. Not even getting knocked unconscious.