The unnamed weapons officer of Kruge's Bird-of-Prey in Star Trek III, whose single shot unintentionally destroys the USS Grissom and who is executed on the spot by his commander.
The gunner serves aboard Commander Kruge's Bird-of-Prey when it decloaks over the Genesis planet in Star Trek III: The Search for Spock.
Kruge wants prisoners who can tell him about Genesis, and orders the gunner to hit only the engines of the science vessel USS Grissom. The torpedo instead blows the whole ship apart, killing Captain Esteban and everyone on board.
The gunner offers the excuse that it was a lucky shot. Kruge, furious at losing his captives, draws his disruptor and vaporises him at his station, a moment that establishes how ruthless he is and leaves the survivors on the planet below, Saavik, David Marcus and the young Spock, as his only source of information.