“Not all of us,” the Doctor answered. “In fact, not most of us. Most Timelords stayed on Gallifrey. At least, when I wasn’t the only one.”
“If you mean the fact that I look human, it’s not that Timelords look like humans, it’s that humans look like Timelords. If you mean that I look like Tomoe Mami, then it’s… I don’t know. Ever since my twelfth life, I’ve always looked identical to a pre-existing person.”
She smiled. “I know what the Incubators are, dear. Just about the entire galaxy does, to be honest. That’s why I know what a Puella Magi is. Although, there are better ways to prevent the heat-death of the universe.”
"The only one? Don’t tell me you are the last of your species. Such an advanced one, at that. Such a shame." Kyubey’s ears folded over as she shook her head solemnly.
"Hmm, interesting. It’s odd that you would take on the identities of those already in existence, that would make keeping yourself incognito quite the difficulty."
She gave a sheepish grin, embarrassed. “Oh, my apologies. I should have known that you would know.” Now her expression was intrigued, as she wore her feline smile.
"Oh, please do tell me of these better methods. If one does prove a more effective process, then we shall do our best to implement it."