Mephisto is a tall demon, standing at the height of 6'5". He had purple hair and green eyes. Usually wearing a top hat to complete his outfit.

Mephisto is a carefree demon who enjoys causing some chaos to entertain himself. Often seen as cheerful, Mephisto is able to take things seriously when the situation calls for it.

He enjoys Japanese culture, especially pop culture and manga. 

Headmaster of True Cross Academy. Cheerful.

Amaimon is 5'8, has green hair with a point at the top. He is always seen with his red jacket. Amaimon has a sweet tooth and likes to eat snacks he buys from around Japan. 

Arrogant. Sweet Tooth. King of Earth. Curious.

Lucifer is a tall demon with a blond hair and tail. Due to his power, his host body's skin is black and diseased, something he keeps hidden behind a mask usually.
Lucifer is a polite demon, but can come across as idealistic and one-track minded when it comes to his goal. His goal is to have Gehenna and Assiah united and to live peacefully with humans. 