Deuteragonist

A deuteragonist is the second-main character of a story, after the protagonist. The deuteragonist is normally the secondary protagonist of the story.

The deuteragonists of the 3D Universe have a lot in common. They normally start out not getting a long well with the protagonist, for example Sweet who blames Carl for their brother and mother's death. They normally come around though seeing they have really redeemed themselves or that both of them have same goals. The deuteragonist also accompanies the protagonist in the final mission (Ken, Sweet, Salvatore, etc.).

The deuteragonists of the HD Universe have known the protagonist for a long time and have work with them before. They are normally introduced in the beginning as a close friend to the protagonist.

Trivia

 * Salvatore Leone, Gay Tony and Dave Norton are the only deuteragonists to directly attempt to kill the protagonist. Of the three, Dave is the only deuteragonist to intentionally attempt to kill the protagonist.
 * At the age of above 60, Salvatore is the oldest deuteragonist in the Grand Theft Auto series.
 * Roman Bellic is the first deuteragonist whose fate can be decided by the player.
 * Lance Vance and Salvatore Leone are the only deuteragonists to have also been antagonists in other games.