User blog comment:Sunako30/Who is your top five strongest characters in owari no seraph in your opinion/@comment-27090820-20160106000419/@comment-25942629-20160106011357

There's no information about Lest actually ruling Europe. He certainly has power, though.

It looks like Mahiru may have been born with Asuramaru inside her. In the Catastrophe LNs, she repeatedly trounces the other characters, and Kureto straight-up states she's stronger than him.