Kat was in a compartment with her friends when Professor Black's voice was heard through the train. As the others started to murmur, she got up and looked out into the corridor outside the compartment, immediately taking on the role of Head Girl, if only for the last time. "Let's go," she said, not waiting to see if the others came with her. Younger students came to ask her for advice, but she only told them to do what Pofessor Black had instructed. Really how stupid were they to think of something else?
She made sure everyone was in the car with Slytheris, and made sure Professor Black's instructions were met. She'd taken two trips with younger students when the first scream was heard. Throwing herself into a compartment next to her she could see Death Eaters arriving outside the windows, and for a moment she stood transfixed as she stared and saw people fall and die. That's when it hit her. People were dying! This was an attack. She didn't bother to tell anyone or help anyone, she simply Apparated straight home to safety. Helping others were all good and well, but she was not risking her life for it.