Do gta online players have a default protagonist?

The only verified evidence available is the Wikipedia article on Grand Theft Auto V, which describes the single‑player storyline and its three protagonists. That article does not mention the multiplayer component, GTA Online, nor does it state whether a default protagonist exists there. Because the source lacks any information about GTA Online characters, we cannot confirm the presence or absence of a default protagonist for that mode. Further research would be required to answer this question definitively.