User blog comment:Calvincambridge30/Versus/@comment-27006668-20151022153447/@comment-27006668-20151024142824

They're not immune to an Angels power, seeing as how Castiel was able to affect them using super strength. If Archangels are able to affect The Darkness with their power, I'm positive they can affect leviathans with it.

But who would win Dick Roman or Michael? Dick isn't immune to Michael's power and can't negate it.