[Rei shakes her head.] Merlin doesn't deal with spirits of any sort. We've gone over it at length, and he's...smart but still kind of clueless.

[She'll leave it at that, and nod thoughtfully before giving him a very impressed look. Her lips peel back into a genuine, delighted smile.]

That is incredibly thoughtful of you. Mint is one of those things that will grow forever, given half the chance. Incense is another thing that should help, and sage is a fairly basic thing to use. Though, I'm not actually sure if a synthetic stick would be better or not. Ah...if she was bothered by dead plants, something maybe made from an extract might be better, so it's not harming anything and merely being used.