Can franklin michael or trevor be used in gta online?

Grand Theft Auto Online is a separate multiplayer experience from the single‑player story of Grand Theft Auto V. In online mode, players create a custom character that is distinct from the game's three protagonists. The online game does not provide options to use Franklin, Michael, or Trevor as playable avatars. Instead, players can interact with the world through their own online character, which can be customized and progressed independently of the story mode.