i'm definitely making her atlantean and i agree with the... mushing together of universes for simplicity's sake. i'm working through it right now but the vague idea i have is that she is 'technically' next in line for the throne of whichever atlantean kingdom i throw her in. her family was ousted by a group of usurpers and they all split up to go there separate ways and hide. this led to her coming to the surface world where she has had to deal with being exceptionally 'normal' (read as: not royal anymore).