The brother of La'An Noonien-Singh, taken with their family from the colony ship SS Puget Sound by the Gorn, who gave his life so that she could escape.
Manu Noonien-Singh is seen in memories and visions in the first season of Strange New Worlds, most fully in Memento Mori, played by Cameron Roberts.
As children he and La'An were aboard the Puget Sound when it was captured by the Gorn. The passengers were carried to a nursery planet to be hunted and used as hosts for Gorn young. Manu kept his sister alive and in the end sacrificed himself to give her the chance to get away, leaving her the only survivor.
When the Enterprise is stalked by Gorn ships, La'An is troubled by glimpses of him, and Spock mind-melds with her to recover what she has buried. In the memory Manu shows her notes he had kept on the flashing light signals the Gorn use between ships. That knowledge lets the crew fake a message and turn the hunters on one another.