Oh. He always forgets about the Defense Force since they haven't tried to kill him or anything, but it makes sense for her.

"I accept challenges at any time." That counts as 'making himself available,' right? "As for advisors..." He makes a face and then concedes, "I don't always listen to her, but Etna is my right-hand demon. She'd make a good Overlord if she ever managed to kill me."