River studied Krad intently, blinking in surprise when something flickered across his expression. It was a quick change, but it was gone as fast as it appeared. It was so brief that River couldn't exactly pinpoint what it was. Whatever the emotion was, it looked so alien on his usually optimistic face that she was slightly disturbed for a moment. That was gone once he reassured her, though the teeth didn't help. Teeth- that was an odd thought. If the nightmares fed on unsubstantial things like dreams, why did they still need teeth? Her mind occupied by the question, she poked Nao gently to get her attention. Following that, she wrote out the question in the dirt and dust that covered the floor with her hoof. Her attention diverted to the newcomer, Elphaba, and River was slightly surprised to see that she was an alicorn. Was she one of the princesses? No, she couldn't be. Alicorns were so rare that seeing her somehow nade River feel some sort of awe.