The creator of the universe and the father of the gods, Zero stands tall and proud in a majestic pose with a holy light radiating around his glory! While he spends most of his time trying to maintain the balance of the universe and order amongst the other legendaries, occasionally he gets bored and decides to have some fun, usually at the expensive of innocent mortals, whether by causing disasters or simply kidnapping some random, underserving individuals to torture and punish for his own amusement, sometimes transforming them into pokemon and sending them off on a mission to "save the world" or something like that.
He loves being worshipped and at times acts over the top to impress people, even acting as if his actions are for the greater good and the curses he inflicts upon mortals and the suffering he causes them are gifts that they should be honored to have bestowed upon them.