Suddenly she'd gotten very close, which hadn't been his intention whatsoever, but at least she didn't flinch or look terrified when Lotte did - and she'd never even been that close to him. "I think so. I mean, there are... books and things about white witches, aren't there? I'm sure some use their powers for good rather than evil." Shield spells had to be white magic, since they were used to protect others. Somehow that didn't seem very evil, even if Gabby did just use them to protect herself.
Instead of tensing and pulling away, the contact made Bran smile. A part of him asked what he was doing, but he shrugged it off. "Good to know. Thanks."