The Demon King.
It was a title with a completely different concept than the Demon King I had in mind while consuming Earth's culture. The word 'King' had always been used to illustrate the highest ruling authority, but with the Demon Realm, the 'King' acted more like a religious leader.
Which was rather weird to me, since the demons didn't look religious at all. Was it because there was no big worship activity? There was no obligation to do any worship aside from the New Year. Each community had a habit of praying during harvest and going to the Temple during hard and important times, but it was more cultural and religious.
Or perhaps because the King showed himself to the public--well, it was my first time, even. Since the governmental position had already been carried by the seven Demon Lords, there was no need for the King to show up unless a matter that might destroy the Demon Realm came out.