Are there canonical story mode characters in gta online?

According to the provided evidence, Trevor Philips, a playable protagonist from Grand Theft Auto V, also appears in Grand Theft Auto Online. The evidence confirms his presence in the multiplayer component but does not mention the other two story mode protagonists, Michael De Santa and Franklin Clinton, in relation to GTA Online. Trevor's inclusion in GTA Online positions him as the only explicitly verified canonical story mode character from the single-player campaign in the multiplayer environment, based on the available information. His role as a leader of Trevor Philips Enterprises and his conflict with rival gangs in Blaine County remain consistent with his narrative in the base game.