I wonder... the fey are not welcome in human society... mages are shuned and closely monitored... in worst case she might be killed by a knight or clerical.
The Fey on the otherhand have isolated themself from humanity and only VERY rarely interact with them under disguises... I mean most if not all people in even this little Hamlet right next to a fairy kingdom believes them to be nothing more than Myth or stories
Belle can be unseen.
The Fae can be selectively invisible not to mention magic can be used to alter their appearance.
But I was wondering if Belle can stay if she wants to stay or is will she be compelled to return to the pixie lesbian pond.
Of course you can use a Fairy Stones (also known as Odin Stones or Hag Stones, Holey stones) to make the Fae visible. Fairy Stones are literally stones with natural holes eroded in the center by water. Using the fairy stone should be done by the water where you found the stone. Holding the stone to your eye, look through it and walk around in a circle three times saying:
“The fairies peek and they see me.
Now I'll peek and I’ll see thee”.