Door
The daughter of a noble family from London Below, Door managed to escape from the assassins that killed the rest of her family just before she met Peter Mayhew, a normal Londoner.
Where is she from?
Door is the main female character in the BBC TV series Neverwhere, which was written by the inimitable Neil Gaiman, who later adapted the series into a novel, which in turn was adapted into a 2013 BBC Radio Drama.
Laura Fraser played Door in the TV series, which I've never seen because American isn't allowed to have nice things...
Natalie Dormer was the voice of Door in the 2013 BBC Radio drama.
Comic Appearances
GND 033 - New part-time tenants Door and Richard visit Sarah to introduce themselves.. Their chaperon the Marquis De Carabas immediately gets into Jareth's wardrobe.