Bruno Sheppard, codenamed Thunderflame, is a member of V.E.N.O.M.. He wears the "Thunderflame" Mask. Sheppard is a demolitions and engineering expert, giving Miles Mayhem someone who knows how to cause destruction. He is the primary pilot/gunner of the Rhino vehicle.
Bruno Sheppard was one of the recruits for Project Spectrum. He was present for the first test of Project Spectrum's transforming vehicles, and was one of the recruits to not be shaken seeing William Evans and Marcia Watkins die. When he commented that he'd much rather go in his sleep, Matt Trakker yelled at him in anger, saying that they were their colleagues. Bruno countered that they were recruits, and while it was sad that they died, death was an occupational hazard here.
During a field test in the Canadian Rockies, Sheppard identified that the various materials the train was made of could be mixed to create thermite. One spark and the whole train would blow. When Matt discovered a group of civilians in one of the train cars, Bruno was forced to stop him so that he wouldn't die as well. Sheppard was one of the few not demoralized by the test, and as such was recruited to Miles Manheim's black ops team.
Sheppard was part of the M.A.S.K. team at Governor's Island and took part in a mission to neutralize the Autobots Kup and Aileron in Greece. He piloted the Rhino vehicle with Julio Lopez, manning the truck's weapons and firing on Kup. He continued his role as Rhino's gunner during M.A.S.K.'s assault on Autobot City. During the fight, Sheppard, Vanessa Warfield, and Sly Rax disappeared, and were presumed dead in the Ore-13 explosion.
The three of them, along with Miles Mayhem, later turned up alive as part of Mayhem's V.E.N.O.M. team. Harrison's Cave in Barbados, Bruno removed his Thunderflame Mask to reveal half of his face replaced with cybernetic enhancements. When Matt asked what happened, Bruno angrily blamed the M.A.S.K. leader for his current state, much to Matt's confusion. As the team escaped from the cave, Bruno pursued, blasting them with fire from his Mask. Matt briefly knocked him out with his Thunderhawk's door-wings, but Bruno's cybernetics kept him from injury. He proceeded to attack Gloria Baker's Shark in his Rhino. As Gloria escaped, Bruno vowed revenge on M.A.S.K. for what they did to him.During V.E.N.O.M.'s attack on the remaining M.A.S.K. agents at
- In the original toy line, Sheppard’s Mask was called "Magna-Beam".
- Bruno Sheppard on the TFWiki