Are gta v main characters accessible in gta online?

Grand Theft Auto V’s single-player mode follows three protagonists—Michael De Santa, Franklin Clinton, and Trevor Philips. The source states that players control these characters during the story’s heists and interactions. It does not provide any information regarding the presence or absence of these characters in the online multiplayer component, GTA Online. Therefore, based solely on the evidence given, there is no confirmation that the main characters are playable or accessible in GTA Online.