She was in the library assisting a second year with an essay when one of the Hufflepuff prefects rushed in. While the older student didn't give her specifics, Rose only concluded that something terrible had happen. Quickly, she gathered the few students in the library and ushered them to the Great Hall.
Upon her arrival, Rose was confused and shocked by the number of crying or stun in silence students. She felt a brief moment of uncertainty before her instincts kicked in and she went around the room offering help wherever needed.