Regenerating from Reattaching a Skull?

[Flashlight237]

So uhh... We have a character that can detach and reattach part of her skull at will:


Would that qualify for High-Low (our usual go-to for reattaching major body parts), or would that qualify for Low-Mid due to such a thing normally exposing the brain?

 

[Zabazab]

It's cartoonish so it's hard to tell (we don't get to see the brain at all, inside is just a flat plane), but it feels like Mid-Low.