Fourth Timeless Child
From Tardis Wiki, the free Doctor Who reference
The Fourth Timeless Child was one of the many incarnation's experimented on by the First Tecteun while she tried to learn the secrets of regeneration. (TV: The Timeless Children)
Appearance
The Fourth Timeless Child was a young-looking boy with short black hair covering his forehead and black eyes.
Like his predecessor, he wore black leggings and a pale green robe with a dark green sash and a high collar. (TV: The Timeless Children)