Nurse Chapel, and "Number One"* from the original series' original pilot, The Cage. Both of these characters are main cast in SNW, sadly no mind-swap plot with

Nurse Chapel, and "Number One"* from the original series' original pilot, The Cage. Both of these characters are main cast in SNW, sadly no mind-swap plot with these two has happened yet. * I don't think she had a full name at that point?