You can, if you're paying close attention to your environment, guess that this bedroom was hastily rearranged and redecorated. This nice calm relaxing white bed with no chains or handcuffs on it, for example, probably wasn't in this room before she got here. There's a shelf full of books she can't read whose dust levels nonetheless suggest that they were hastily placed here. There's a comfortable sitting-chair that probably also wasn't here previously. There is a clean ensuite bathroom that looks frankly horrifying in its crudity, but one that will, fundamentally, let you draw a hot bath. There's a huge fireplace with logs, for the benefit of anybody who'd like to burn wood inside a room and inhale some of the resulting fumes.
Since it's not possible to repaint the room, per se, it is still done in blood-crimson walls, and there are both red lights and standard bright Continual Lights. By pure coincidence, this is also what a sensible person of Civilization would prefer in the way of lighting options to avoid disturbing her sleep cycles.
There is, at least, no window exposed to the outside out of which light cannot be fully blocked.