Maou the Great Stygian of Abe (Temp) is a demon and last boss of the game that Nagi is playing in episode 10. She wears a talking skull named Gaikotsu on her head who punishes her when she tries to help the good guys. Ma� is chained to her chair and resides in her fortress on top of a tower. She tries to capture a hero from the outside world using her guillotine fishing rod to play the game and send her to the underworld. Ma� ends her sentences with 'tima' which could be a Ultima reference. A parody of Asahina, Mikuru from The melancholy of Haruhi Suzumiya (Pose "Mikuru Beam" and maid outfit). She also appeared on episode 50 as a host of the quiz game, and appears on the inner cover comic (the one under the dust jacket featuring Nadja Orumuzuto) of Volume 13. (Source: Wikipedia)