Bellatrix raised her eyebrows again. "I was bored," she said, shrugging. It was a partial truth, and why should she reveal anything to this boy?
After a moment she sighed. No one had asked her why she had attacked Helena. They just thought it was because she was crazy. Her eyes slid over to him and after a moment, she spoke, "Sometimes, I need to hurt someone like I'm hurting. It's an outlet, like drawing or something like that."
Bellatrix picked up her mango and took a bite out of it, managing to keep any of the juice off her chin. "Are you a friend of hers? If you're expecting an apology, you'll be sorely disappointed. I don't regret it."