A Player Character (PC) in World of Warcraft (WoW) is an in-game Alliance or Horde character controlled by you or another person (also known as a Player).
When you first start playing the game, you create a character for yourself, and you play the game as that character.
Also referred to as just a Player or a Character.
Some other names used:
Alt or Main Avatar Toon NOTE: Player Characters are just one type of in-game character; see Non-Player Characters (NPCs).
Fighting another player character is called Player versus Player (PvP).