This is probably the amount of piercings Forth'Wyn will have in at least one ear, maybe a few less in the other. She's kinda sensitive about her ears because they're pointed, so I imagine all of the piercings are her way of making them more /her/.
The different types of Ear piercings you can get. I actually like this diagram of it compared to others. I have my industrial, Tragus, forward helix, ear lobes, and a helix piercing. I really want a rook!