She thought about it a little. "Well, I'm from the magic school... Someone in that school made him evil. But you should know that I can't tell too much, right? Wouldn't want to totally change the future..."
In a way, she was right. As much as her intentions were to keep Wyatt from becoming evil, she couldn't very well flat out tell them who it was. What if the person was vanquished too soon? It could mess up the entire future.