She stares at the walls of her cell, thinking about the things she's just learned, turning them over in her mind.
The revelations were not entirely unexpected, perhaps.
There have been a few times when they've said things about themself that they've been surprised by, things that make slightly more sense with these latest revelations: I'm beginning to lose confidence for the first time in my life. And that covers several thousand years and the Hand of Omega is a mythical name for Omega's remote stellar manipulator, a device used to customise stars with. And didn't we have trouble with the prototype... But she's never seen, never remembered the woman in the memories the Master showed her.
No, she realizes with a jolt. I have seen her before.
Ze was glancing at the timelines of the humans at the gala, watching them turn and split, possibilities growing brighter and fainter with each movement and decision. They'd always been unusually talented at seeing timelines, but this regeneration was especially good at it. In fact, ze noticed, ze could even see zir own timeline. Ze looked at it for a moment, then decided to dive into it.
Zir timeline was fascinating. Ze could see it twist and turn, break apart and draw back together. Some timelines broke off, only to join back together later on. Others looped back on themselves or ended abruptly. Ze edged along, getting flashes of possible futures: in this one, ze travels with Grace; in that one, she rejects zir offer and ze meets a woman named Sam. Ze continued along, seeing war and peace, joy and sorrow, hellos and goodbyes. Then ze passed through a place where the timelines got tangled together. Suddenly ze caught flashes of war, of destruction — of giving up their name. Ze passed through there as quickly as possible. The timelines continued breaking off, merging and turning on themselves, albeit not quite as much as before. Suddenly, ze saw something strange — at one point the timelines spit, but then they did not diverge — almost as if the two timelines were happening in the same time-space-universe. Ze got a flash of themself saying “I grew out of you”. Ze stared at it for a few moments, then decided to jump in and see what would-was-will happen.
Ae was-is-will be standing at the TARDIS, talking with Donna.
"No, wait. I'm part Time Lord, part human," ae said-say-will say to Donna.
Ze pulled back from the event and frowned at it. This Donna was some sort of important person in their life, ze knew that — she was like a… what was the word for for the person who brought you into the world? Ze cast zir mind back, trying to think of someone who was like that to them.
Memories, vague and unfocused, floated to the surface of zir mind. There was a person there, a woman with pale skin and long dark hair, looking at them as they laid on some kind of chair.
“Don’t worry,” said the woman. “I’m your mother, aren’t I? I’m not going to hurt you.”
Oh, ze thinks. Now I understand who she is.
Ze carefully takes zirself out of zir memories as Professor Wagg asks, "Grace says you have a big secret. What is it?"
Ze smiles and leans in, knowing that ze has an excellent response, thanks to this recent trip down their timeline.
"I'm half human. On my mother's side," ze says as ze steals Wagg's ID card.
Ae watched the TARDIS fade alongside aer memory. Soon, it was gone, and ae was alone on the beach with Rose. Ae kept staring at the place where it had been, thinking about what ae had just remembered.
Why would I think that Donna was my mother? ae asked aerself, mentally shaking aer head. Rassilon, that’s bizarre. And more importantly — here ae frowned slightly — who was that other woman I saw in my memories?
Ae was jolted out of aer thoughts by Rose saying “Doctor? What are you thinking about?”
“Oh, it’s nothing,” ae said to her. “Shall we go off now?”
“Sure,” replied Rose. The two turned and walked away to their new life.
End Notes: “I'm beginning to lose confidence for the first time in my life. And that covers several thousand years” is a quote from The Silurians. “The Hand of Omega is a mythical name for Omega's remote stellar manipulator, a device used to customise stars with. And didn't we have trouble with the prototype” is from Remembrance of the Daleks.