"All business, Miss Brown." He shook his head with a smile. "I was just thinking that if in-the-moment intent - emotion, magical strength, all of that - is what changes the strength of our shield charms, maybe there's a way we can affect that on purpose?" It wasn't a fully-formed thought yet but he found it interesting.
"So Miss Brown," he liked calling her that, "What do you do when you're not saving the world and training us all to do the same?"