Vulcanus

He is an archangel who serves Seraph Lamington and his right-hand man and second-in-command. Unlike Lamington, who is stoic and never raises his voice, Vulcanus is loud and brash. He has nothing but contempt for demons, believing them to be the source of all evil in the universe, and believes that humans are too stupid to live without the guidance of angels. This is in contrast to Flonne, who believes that any being, demon or otherwise, can hold love their heart. [spoiler]Vulcanus is the main antagonist of the story, being responsible for a variety of events that happen including being the reason behind Carter's invasion of the Netherworld and signing a contract with the demons to kill Laharl, Etna and Flonne. Intending to bring Seraph Lamington into his mess it is revealed Lamington knew of Vulcanus's actions and betrayal, punishing him by turning him into a flower as punishment.[/spoiler] (Source: Disgaea Wiki)