My two big harps are both Pixie proof - there's a big, iron rod running up the bow of them, and pixies (and fairies) hate iron.
Miranda, Devika, and Taelyn can't stand them and won't come near them even when I'm playing (and I tell myself it's because of the metal, not the playing). I thought my harps were pixie proof, until Thorne came to hear me play.
He loves my harp!
Who would've thought?
When asked about why he isn't bothered by the iron in my harps, he just said that they remind him of home and wouldn't explain further. Hmmm.