[So far all he's done is be grumpy she almost ran into him. Going to take a lot more than that to scare her. Sorry.]

It's probably just folk lore. But if it's anything like the ones at home, it depends on the piece.

This one? [A tap to the armlet she's wearing.] Is supposed to be for general protection, but specifically against misfortune and I guess bad luck?

[Her smile is sunny, unbothered.]

And I didn't actually run into you, so maybe it's already working! But usually they're only good for minor protection against bad things. I doubt you could get any serious sort of protection just anywhere.

[Come to think of it, maybe she should look into some sort of anti-possession charm. Just in case.]