First Timeless Child

The first incarnation of the Timeless Child was found by the First Tecteun on an unnamed planet.

Biography
When the Spy Master first mentioned the Timeless Child mystery to the Thirteenth Doctor, she got a massive headache and a flashback to when the Remnants approached her, as well as a glimpse of a child wearing yellow robes and standing outside a tall building under a purple sky. (TV: Spyfall)

While aboard a space platform in the far future, the Doctor, after having fallen unconscious due to Zellin's powers, dreamed about the vision of the Timeless Child while the Master's message to her echoed in her mind. In this scenario she was actively present in the vision. (TV: Can You Hear Me?)

The Timeless Child was eventually revealed by the Master to be a child discovered on another planet who had the power to regenerate, and had come through a gateway from another universe or dimension. The child was adopted by the First Tecteun, who discovered her power to regenerate after she suffered a fatal fall from a cliff. (TV: The Timeless Children)

Appearance
The First Timeless Child was a young-looking dark-skinned girl with brown eyes and short black curly hair. She wore a reflective scales-patterned ray robe with a brown sash. Over it she wore an open gown of similar pattern with wide cuffs, square button and saffron yellow-black fabric. (TV: The Timeless Children)