Drizzt. The bane of D&D players everywhere. "Look, it's a cuddly Drow!"
I hate D&D alignments. There's never one that really, truthfully FITS. I mean, how would you describe an American G.I. that faithfully protects his fellow soldiers, divides his rations with the homeless kids in the street, but will also beat a known Taliban bomber to a pulp in order to find out the location of his fellow IED builders? CG? LE? Pallladium has better 'alignment' values, but they're still restrictive.
Hmm. If anything, I think a Drow might be fleeing from responsibility. Perhaps she was expected to undergo an arranged marriage in order to link two bloodlines and perhaps prevent some kind of inter-house conflict. That could work.
Obviously we're steering wide of the mark as far as Drow are concerned in some ways. I have a pic that I like as a potential 'image' that I can get into my head and play with:
T'ren is the name that comes to mind. No clue what it might mean, but it sounds
Drowish, at least.
My thinking is that she is from a fairly small house, at risk of being absorbed by another. She's never had much interest in inter-house politics, but doesn't want to be considered a complete exile. Sadly, backing out of an arranged marriage might well be the last nail in the coffin as far as her returning to the Underdark is concerned.
(How's that for motivation?)