CG Midlander

[Kirisu]

Armory System.

Not sure why it needs to be any more complicated than that - we've seen NPCs use the teleport/return function, no reason why they wouldn't be able to change classes as they please too (and occasionally show it in action in a trailer).

^This

Its simple, the first trailer was an echo of the past. Remember, he was viewing someone else's memory, and its worth noting that, that was not an ordinary sword on his back, it was a greatsword, thus by word of god, he was neither gladiator nor marauder in this video... In the ARR trailer, they've put him in a WAR AF to represent progress, he's an adventurer, a hero of eorzea and he needs to look the part!