Responses
She's a witch she explained in ch15 that she can cherry pick events that have happen and make them into the day she wants. However the only way she can do this is because of Aya. She need Aya to tell her what has happen through out the days she has live so so can pick the events she wants to happen. If Aya didn't warn her she would have actually died.
I dont get it, how could yuuka undo her death when she died before Aya told her about the freak accident?