It is also unlocked right before maintenance, at least it was for me. I managed to sneak two alts in like 6 minutes before the servers went down. If you want to create multiple characters, click create and at the loading screen force crash/kill the game, then immediately log in to create a new one. You can make multiple characters this way without going through the long intro cutscene if time is of the essence. (though you will have to go through the cutscenes the first time you log into the character to play it)
