Thread:Houki Minami/@comment-26709288-20171016224058/@comment-26087580-20171016230247

Actually, the path of the six realms, which we call Rikudou or in western terms Samsara, are forms of either punishment or reward for one's Karma during their human self. There is the "Hell", Naraka, where the foul ones are tossed to be punished until they're "clean" to then die and reincarnate as another being in another path, the Heaven, Deva, where humans with good karma are rewarded and so on and on.

Indra is considered the Conquestor of Asuras, but he's not one of them. And yes, DxD separates both entities as The Trimurti are gods and the asuras are their own category, similar to Kami's in Shinto(the differences between gods and Capital G Gods.). In layman's terms, Asuras are minor Gods, not Demi, minor Gods.

And, yes, Asura's are technically reincarnated humans who died filled with rage and grief, but I doubt that he'll be able to break free from his realm with Indra around, which according to the DxD lore, is a parallel dimension from Issei and co.'s.

The most basic thing you can do is Pull an Rokudou Mukuro from KHR: He has recollection of all the six realms and thus, theoretically, can think as a human/God in any other realm, find a way to escape the Asura Realm and disguise himself, and while this is some form of a stretch, is better and more plausible than learning Naruto-style ninjutsus...