What exactly drives someone to go Grimdark? And could you still be stable/normal? I’ve heard many opinions that stated something such as Grimdarkness revealing true parts of your personality, the other is just you simply being driven to a form of insanity. I would like to hear to take on it.

Rose was still very much Rose while Grimdark, except for the fact that she was seeking out revenge. But it wasn’t like she was on a murderous spree- She was still very much friendly with John and trying to communicate with him to a… Frustrating degree. She was given the tools to exact revenge on Bec Noir, and she went after him. Given what she did later on in Game Over, it’s her way of dealing with grief. Intense rage. However, while these impulses may be Rose’s, Grimdarkness still gave her the power to actually go do it, and very likely fed into her negative emotions. Also- It’s just Horroterror Corruption, that really is the only thing there’s to it.