Lou

Lou is Lord of The Underworld and father to 10 shinigami. When creating his kids he tried to put an attribute in them that stood above the rest of their attributes, Accept with Jorel and Veintun. He tried to make Jorel flawless in strength but this came with many flaws in personallity, like his cockyness and jealousy. Then Veintun was created, he was given a mark it was a legendary leveled mark, it gave him an unknown power but Jorel didnt want him to be stronger so Jorel placed a seal over the mark so that Veintun could never reveal or use this power.

The Lord of The Underworld
Lou used to rule the whole world in the dark ages about 3 billion years ago with an iron fist... but one day a mysterious man confronted Lou and placed a seal on him that trapped him in The Underworld for eternity, but at what cost the man had to trap himself in The Underworld to for an eternity. This man was the most powerful sealer in the world and James's ancestor.