How does character creation differ in gta online?

Quick Answer
In GTA Online players create a fully custom avatar, whereas GTA V’s story mode restricts you to the three predefined protagonists.
Explanation
Grand Theft Auto Online replaces the three fixed characters of Grand Theft Auto V with a customizable silent protagonist. When you start GTA Online you are prompted to design your own avatar, selecting gender, facial features, hairstyles, tattoos, clothing, and accessories. This player‑created character can be altered later through clothing stores and grooming options. The customization is tied to your online account and persists across sessions, allowing you to personalize your appearance for both cooperative and competitive multiplayer activities. In contrast, GTA V’s single‑player campaign limits you to Michael, Franklin, and Trevor, each with a set appearance and personality, and does not offer the same level of visual personalization.