Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - General Joining multiplayer game with my own character?

You create a game, not a character. Your character is not some independent entity that joins games. They are within your game save file, they only exist in your game world. So when you join a multiplayer game, you are joining the save file that includes whatever characters the person that hosted that game made.