As I said in the newsletter, this is how George and I described it in the script.
PANEL 1: And this is a full-page splash revealing a woman wearing what could be a Gallifreyan flight-suit, complete with a helmet with a visor that hides her identity.
Racheal really went for it, and this is the result, her initial ideas that were circulated to the other artists.
But who is under the helmet? Well, you need to read the Alpha issue of Doctor Who: The Lost Dimension to find out.