Mao "魔王"
About
Mao is extremely powerful, according to her aide she is the strongest demon lord ever spawned. She does not need to eat or sleep, money is not a problem as she is able to create gold and other precious metals with her magic.
She uses a double in the form of a fairy to interact with the outside world, the double's view is shared on a screen with her aide in the demon lord castle throne room.