The mystery of Ruby Rose has not simply been the circumstances of her birth, it has been why it’s she seemed to be only signed up for one season of fun in the TARDIS. Millie Gibson’s character has been the strongest foil for the Doctor since Billie Piper’s Rose, one with charisma and sufficient cool to take on the universe, plus abandonment issues that meant you couldn’t help but root for her. Plus a certain knowability, which is at least one of the above qualities that come straight from Gibson.
“The other day, someone came up to me and said, don’t we know each other?” says Gibson, “I said, ‘Well, do you watch Doctor Who?’ and they said no. I was like, ‘Oh I don’t know then,” like an idiot. People think I'm a familiar face, but in a friend way, like we went to school together.”
