Character selection displays all your heroes. You can play as many as you want, but only one per game world. Playing more than one hero on the same game world is not allowed.

Click on "New character" to create a new hero.

Click on "Import" to import your heroes that are not currently displayed.

Here you can change the order your heroes are displayed, and also remove heroes from account management or delete them from the game.
Attention! Restoring deleted heroes is not possible!

Click on "Log in as guest" to play a character without saving login data. This function can also be used if a friend wants to log in to his account.