This is a truly awesome quest. So awesome that I must award you with this stamp.
Small notes:I didn't see anything of note, actually! You included refs, the backstory and mythbase is fine, everything else fairly interesting... I noticed in the wikipedia article that the Huldra was said to steal children and leave changelings behind, by a symbol of the hunt, ect -- did yours do any of these things in her past life?
Also, does she turn ugly if a man scorns her in her Fa'e life? 8D
Ok, well, this is not supposed to be a critique (OLD HABITS DIE HARD) -- enjoy your stamp and keep up the fabulous work!