Mard Geer Tartaros

Marde Guille is a member of the Dark Guild Tartarus and is also known as the "Demon King".

Appearance
Marde Guille's looks resemble those of a young man. He sports shaggy hair of dark color, long enough for its bangs to reach his nose and likewise, strands of hair to cover the sides of his face all the way to below his shoulders. His attire consists of a dark colored shirt and a light colored cape with a pattern of flame that is torn into stripes on the bottom. Marde also wears light colored trousers that are tied by straps on his thighs and slightly above his ankles, as well as boots of a dark color.

Personality
Not much is known about him, however, Marde Guille's personality appears to be rather ominous. Mysteriously smiling, he is seen talking about darkness consuming light, seemingly adressing his words to the master while holding the book of E.N.D. As the rest of the Demons, Marde belittles humans, claiming that their pitful attempts mean nothing against the true power of a Demon.

Tartarus arc
Marde Guille appears for the first time inside of Tartarus' HQ. Sitting on a throne in his room and holding a book with the letters "E N D" written on the cover, Marde talks about Zeref's Demons, dubbing them as "Etherias", being superior to humans. Seemingly reasurring the master, Madre states that the darkness of hell's gate will soon appear and eat up the world's light.

Curse and Abilities
Expert Sensor: Marde was seen to be aware of the battle happening between Mirajane Strauss and Sayla, commenting on how the former's attempt at demonic powers could never match the power of a real Demon.

Quotes

 * (To herself) "It shall begin soon... Darkness will pour forth from the doors of hell... a darkness to swallow all the world's light."