Brian Heder is a confirmed supporting character in GTA 6, officially described by Rockstar as a classic drug runner from the golden age of smuggling in the Leonida Keys. He still moves product through his boat yard, working alongside his third wife Lori. He is one of the clearest connections to protagonist Jason Duval. Rockstar's own profile puts it plainly: Brian looks like a Leonida beach bum but moves like a great white shark. He lets Jason live rent-free at one of his properties in exchange for help with local shakedowns, and Jason is expected to stop by for Lori's sangria from time to time. That single detail ties three confirmed characters together: Brian, Lori and Jason, all based around the Leonida Keys rather than Vice City itself. Rockstar has not confirmed how Brian's smuggling history began or how long he has worked with the local drug runners connected to Jason. His profile focuses on his present role in the Keys rather than his past, so anything about his backstory beyond the boat yard and his marriage to Lori remains unconfirmed.
The community companion for Grand Theft Auto VI. Database, maps, guides and tools for Vice City and the state of Leonida.