Demon Mangu (デモンマングー), is a member of the band Demons Venom and the guitarist of the band.
He is a dark gray mongoose myumon with some imp like qualities such as having horns. His scleras are red and his irises and pupils are black. His outfit consists of a black hoodie with long sleeves and a big zipper.
He is normally introverted but when he gets angry, he becomes very dangerous.
- He is based on Rockwell, the former guitarist of Silhouette from the Skylit.
- He is usually seen having fights with the snake on his guitar. The fights are never concluded...This is probably because mongoose and snakes have a bad relationship.