The Seventh Timeless Child was the last incarnation experimented on by the First Tecteun before she managed to learn the secrets of regeneration.
Tecteun was eventually able to replicate the regenerative ability for herself and eventually spread it to the other Time Lords, though they limited their number of regenerations to twelve. In the process, the Timeless Child became the genetic template upon which all Time Lords gained their regenerative powers, in effect meaning that a piece of the child is in each Time Lord.
Tecteun and the child were inducted into a clandestine organisation called the Division, led by a Time Lord called Solpado, whose job it was to intervene in time when necessary. After being tested, the results came back saying they were the best the Divison have ever seen. (TV: The Timeless Children)
Appearance
The Seventh Timeless Child was a dark-skinned male with black hair styled into a short hi-top.
Like his predecessor, he initially wore black leggings and a grey-blue robe with a white sash and a high collar while being tested and experimented with by the First Tecteun. However, after she cracked the secret to regeneration, he changed this outfit for a cream dress with a high collar, and a scarlet gown with a high collar over it. (TV: The Timeless Children)