User blog comment:B214/Question and Answers 4/@comment-24866657-20141018113617/@comment-16281343-20141018114904


 * Same reason why Sona wasn't able to help Rias. Politics.
 * The Underworld doesn't have any clue that something's gonna happen like that; plus he's a high-class Devil from a clan that produced the current Beelzebub. They are the one of the least clan to be suspected.