A master of both psychological warfare and hand-to-hand combat, Big Brawler has engaged in top secret operations against despots and terrorists worldwide. When it became evident that most of the world's terrorist activities were orchestrated by COBRA, Big Brawler transferred from Army Intelligence to the G. I. Joe team. He now takes his battle directly to the snake pits, while acting as liaison to the U.S. Army Intelligence and Security Command (INSCOM). He has a natural ability to persevere in the adverse conditions of the world's jungles, in ways that Tarzan himself would be envious of. Big Brawler has refused all officer-level promotions, preferring to remain on the front lines where the real action takes place.
Despite his superior intelligence-gathering and infiltration skills, Big Brawler is quick-tempered and can't resist the urge to pound any COBRA on sight. Since his first mission, when he was only supposed to take photos of a secret spy headquarters but "improvised" and blew up the island instead, he has been regarded as a loose cannon. Good thing he's a G. I. Joe - he's too dangerous to be anything else.
Tripwire is an accident waiting to happen. He's clumsy, jittery, all thumbs, and a nervous wreck around people - unless he's working with high explosives. Then he's calm and collected, with the skill and precision of a surgeon. Doesn't matter what type of explosive, detonator, or blasting machine he's handling, he knows exactly how to make it work without missing a beat.
After dropping out of high school, Tripwire spent two years in a Zen monastery, pondering the meaning of life. All he got out of it was expelled for breaking too many dishes and spilling every liquid in sight. Determined to make something of his shortcoming, Tripwire joined the Army at 19 and found his calling on the grenade range. Something about setting off explosives and watching bombs bursting in air that relaxes him. Hard to believe for a guy who seems to trip over air. If COBRA calls Firefly the "Rembrandt" of explosions, then Tripwire is no less than a modern day "Picasso."