Character

From Styleguide

character

Any computer- or player-controlled entity in a game (excluding inanimate objects). Characters can typically be divided into player-characters, non-player characters (NPCs) and enemies.

In general, use the specific proper name of an in-game character rather than simply referring to him/her as "my character."

Example: Tommy Vercetti remains one of the game industry’s most engaging playable characters.

Also see: avatar, enemy, non-player character, player, player character.