User blog comment:IamJakuhoRaikoben/Chapter 392: I Must Not Forget, Review./@comment-49.150.151.110-20140712122353/@comment-7418318-20140712124654

I've been wondering the same ever since Keith said that Silver was promoted into the Kyukimon, even when we were led to believe he was Deliora.

But there are really only three options. Either his predecessor died in some way (whether by Silver's hands or otherwise) that didn't allow ressurection or that was so embarressing that Mard decided to let him stay dead or he was demoted or they originally were the Hachikimon (or somesuch... Eight Demon Gates) and they enlarged to team to fit him in.