Vriska's going to be asleep, and her dreamscape will mostly be her memories from Alternia! I'll write up an entry in her journal about them sometime closer to the actual start of the event, but most of them will likely involve unpleasant stuff in some way, because Alternia was a pretty craptastic place. There will also be a couple from her planet in the Medium (but not many, because due to her canon point she wasn't there for very long), and I'll put more info up on that, too. Aaaand there will also be plenty of Adstring memories! The actual place will be a weird mash-up of the House on the Rock (where she lives with Hanna & co.), Athel Heim (where she lived with Jo Harvelle & co.), and her castle on Alternia.