As servants or vassals of a supreme being, the three guests of Alexander's universe were unnaturally confident in their prowess and the gifts they were blessed with.
Since they discovered this lower universe from the battle that raged in the true void some time ago, they had kept a close eye on it.
The three beings were scouts, one group of many, of the coalition of universes--as they called it, and were traversing the true void when they felt extremely powerful waves in the distance.
They didn't approach before because they didn't want to give their positions away. And because of that reason, they were not able to gather any information on the being fighting the void creature.
They only knew a Veilwalker was battling the creature, and wherever a Veilwalker was, a universe was close by.
The three beings had returned to another universe acting as their base of operations, reported their discovery and were tasked with investigating.