Alternate reality
Wadjet was an alien who, in the alternate reality, was serving in the operations division aboard the USS Enterprise shortly before that starship was destroyed in 2263.
Wadjet was later held captive in Krall's base. He witnessed Manas remove the Abronath from Ensign Syl's head, the bioweapon having been hidden from their captors there. Freed by Spock and McCoy, he was in the last group of Starfleet officers which escaped from the base. They were protected by Captain James T. Kirk's distraction tactic using a a motorcycle and holographic technology that made him appear to be in several places at once, moments before the group was beamed to safety aboard the USS Franklin. (Star Trek Beyond)
Wadjet was played by Dan Payne. This character was only named in the source's end credits.
The makeup for this character was sculpted by Makeup Effects Sculptor Joey Orosco. The makeup was applied by Special Makeup Effects supervisor Joel Harlow, makeup artist Kevin Haney, and Makeup Effects Artist Holland Miller. (Prosthetics, issue 4, pp. 8 & 9)
In a deleted scene from Star Trek Beyond, Wadjet can be viewed walking behind Kirk and Montgomery Scott in a busy terminal at Starbase Yorktown.