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)