User blog comment:Crimson and Darkness/Volume 24 discussion blog/@comment-86.180.53.240-20171010132719/@comment-29963364-20171011212248

I know that Hades isn't the "God of Death."

Thanatos is the "God of Death."

Hades rules the Realm of the Dead.

Thanatos causes death (although he hasn't been mentioned in the DxD series).

Oh. Ishibumi could (not saying he will) introduce Thanatos as a Grim Reaper in the series. He could be the "Ultimate Grim Reaper."