"The best example of this is none other than Miki Shiba, one of the few truly ordinary humans in the show, who also doesn't know about the existence of Ente Isla, its denizens, or their presence on Earth."
Tell me you haven't watched season 2 of The Devil Is A Part Timer! Without telling me you haven't seen season 2. There's even a hint in season 1!
Also, my favorite secondary character has got to be Prince August, from Wiseman's Grandchild.
