Help for thinking up an interesting twist for a PC's real background?

[Rotolutundro]

KFRO players stay out!:

I'm running a semi-homebrew game in which the PCs are going to discover that there's a link between the elves of Faerûn (1345 DR) and the Sidhe/Unseelie of legend, and the campaign is going to revolve around that and an Unseelie invasion. I have one elven PC, a star elf, who was enslaved from birth by an evil wizard in the Moonsea. She escaped him by joining the Church of Shar (in my version of the Moonsea, the Dark Gods (led by Bane) more or less rule, in that they are worshipped largely unopposed), whose main purpose in keeping her is to avoid adding her power to the Brotherhood of the Cloak, a guild of mages who are supposedly under their control, but in reality are a faction that vies with the Church and the nobles of the Moonsea. The PC doesn't know anything about who she really is, or where she came from, or how she came to be enslaved.

I've decided that star elves have an even closer link to the Sidhe/Unseelie than the other elves of Faerûn, but I could use some input for interesting ideas as to who this PC should really be, or how she ended up enslaved from infancy. She shouldn't be a Sidhe/Unseelie herself, as I have special plans for them, but... I'm kind of ramming my head against the wall when I try to come up with new ideas. Total brain burnout. Can anyone help me?

I always think of asking the forums about 3 seconds before I need to get to sleep. Please don't be offended if I don't respond to great ideas right away!

[Azten]

Ever hear of the real world versions of Changelings? A Fae infant switch with a human infant not long after birth as a cruel trick. This wizard figured out thats what she is, just a star elf instead of Fae.

[Dafydd]

I am gonna +1 Azten's suggestion.

One of the ways the Fae tried to keep their race going was to swap out human infants for Fae infants who were to weak to survive. (I am guesstimating some of this, need to catch up on fae myths)

One idea you could use is the Family the PC was born into had a prophesised super destiny child. The Sidhe abducted this child, leaving the Star elf PC, expecting her to die due to (plot). Unfortunately for the sidhe, this child was taken by evil wizard who was able to care for her.

This wizard, thinking she was the destined child, trained her for (whatever the plot requires). Before the training was complete, she escaped however and (Campaign)

[Rotolutundro]

Interesting! And it gives rise to the presence of an interesting NPC... maybe just in time for meeting the PC, too. The evil wizard dynamic might need some work due to her history with him, but it's a great idea.

I'd love to hear any more ideas anyone might have!