A Malon freighter controller who in 2375 tries to seize Voyager's multispatial probe from the atmosphere of a gas giant, racing the newly built Delta Flyer to reach it.
Controller Vrelk appears in the fifth-season Voyager episode Extreme Risk, played by Hamilton Camp. He commands a Malon waste export vessel that comes across Voyager's advanced probe and attempts to tow it away with a tractor beam.
To keep it out of his hands the crew send the probe into a gas giant, where it becomes stuck at a depth that no ordinary shuttle can survive. Vrelk refuses to give up the prize and sets his people to building a craft strong enough to follow it down.
The contest prompts Tom Paris's design for the Delta Flyer, which Voyager's crew complete in a matter of days. Vrelk's ship fires on the Flyer during the descent, but his own vessel fares worse under the pressure, and the Starfleet crew recover the probe after B'Elanna Torres improvises a repair to the hull.