Story so far

Selfie Guy is a fan nickname for a man who turns up more than once across GTA 6's second trailer rather than in a single quick cut. Rockstar has not given him a real name in anything released publicly.

He first shows up in a bar scene alongside Jason and a figure named Cal, then reappears later at a party in Vice City with both Jason and Lucia. Showing up in more than one setting, next to both playable leads at different points, sets him apart from the many characters who get only one brief shot.

Whether those repeated sightings mean he becomes a proper character once the game is playable is not something Rockstar has confirmed. Showing up twice is suggestive, but it stops short of an actual confirmed role.