Brad grew up on the floating colony and spent most of his early life resenting ground-dwellers like Vash and Wolfwood. He was in love with Jessica, a fellow sky person, but she only had eyes for Vash—which didn't help his attitude toward the outsider.
When invaders threatened the colony, Brad eventually swallowed his pride and fought alongside Vash and Wolfwood to drive them back. The colony still fell anyway, and the sky people were furious. But Brad stepped up, giving a speech that reframed the disaster—the colony was doomed to fall eventually, he argued, and at least Vash had the guts to actually fight back instead of just hiding. It was a turning point for his character.
By the time of Trigun Maximum, Brad's a punk kid hanging around the Doctor, the guy who builds Vash's weapons. As a little kid he'd actually been close to Vash, but after the incidents in July and that crater appearing on the fifth moon, he flipped. He started seeing Vash as a walking disaster, blaming his reckless way of trying to fix things. Trust was gone. Still, Brad matures over the course of the story and eventually comes around, helping Vash take on Knives.
In Trigun Stampede, Brad's older now—older than Vash even—and he's part of Luida and Rem's crew, handling technical repairs on their ships. When he first meets Vash, he's wary again, but he gradually shifts into more of a big brother role. After Knives tears Vash's left arm clean off, Brad builds him a prosthesis using old technology they've recovered. He's aged along with Luida over the years, but he's always there when Vash needs him.
Content compiled by AnimeList.moe from publicly available sources.
