Di was a leading rank of The Dei before their disbandment.

The AI were misunderstood. This isn't very surprising, considering biological beings were virtually incapable of emulating their thoughts in the first place.

So, Di went out to search for a sense of godliness. Now, he wasn't the greedy type, looking to find power so that he could control. But he had seen a glimpse of the "absolute", whatever that meant, and that drove him ever forward.

In a particularly nasty incident, Mora had become a sort of godess in the planets of purity, and Di went on to seek her wisdom in a not-so-cooperative fashion. Like all the other 'mortals', he knew he couldn't understand her. Thing is, he also knew that Nox had helped him get this far, so he hoped this wasn't the end of its plans.

No matter how much of a pawn he was, what mattered most was the pieces of truth he picked up along the way.
Dei are Disciplies of Nox.