"I did regret not helping them," he grumbles. "You have no idea how much I regretted it once I saw the result of Hydaelyn's work. But I could not very well abandon all of our people to embark on a fool's journey. I... I certainly couldn't abandon you."

With one friend volunteering as a sacrifice to their new god and the other vehemently opposed to such drastic measures, how was Hades supposed to choose? He had always been the more dutiful of the three of them and so of course he had chosen to uphold his duty.