Are gta online characters playable in story missions?

The story missions of Grand Terror Auto V are designed to be experienced with the two offline protagonists, Michael De Santa and Franklin Clinton, and they are tied to the pre‑defined narrative and character interactions. In contrast, Grand Terror Online is a separate multiplayer component that allows players to create and customize their own character, known as a player character (PC), and play through a variety of online missions and activities. The online character is not integrated into the single‑player storyline and cannot be inserted into the story missions. Players must use the offline protagonists to complete the story missions. This separation ensures that the narrative experience remains consistent for all players in the single‑player mode.