User blog comment:B214/Question and Answers 3/@comment-75.93.25.66-20140626052522/@comment-16281343-20140626052941

He doesn't have a grudge like the others because he doesn't care. That's just the way he is.

~And they formed DxD not because Rizevim is a really big threat but because of what Rizevim wants to do. if 666 fights Great Red, the whole world will be destroyed. That includes the Underworld and the Heaven.