Yennefer had put wards about the room. Clearly the minders of the hotel could come and go as they pleased, but it was mostly meant to keep other magic users or those who would attack them out of her personal spaces. That didn't mean the hotel couldn't transplant someone into her room as it did with Ciri. It could easily manipulate her magic, which she'd come to accept, considering the differing types of magic users that were now residing inside the building.
Xian would definitely be a shock as she found her body was much warmer than it was usually. Considering how little the woman wore, she was thinking maybe perhaps, Ciri was entertaining her being a mom again. It was an odd way of doing so, but it never hurt to indulge the woman who only sought her affection and approval. It was much the same as she sought from Geralt, from what the sorceress could tell.
It wasn't until she opened her eyes, ready to look down on her with a tired expression that she noticed the woman's hair was black, not white. Violet eyes sharpened to awareness, the sleep sloughing off of her in a sharp wave as she realized there was, what one could consider, a stranger in her bed. "How did you get in here?"