Lukifer Pierre de' Medici also known as Lucifer. Is another of the Witch Queen's best disciples.
One of his aims is to create a "paradise" using the powers of the Divine Design (and the clones of it which he had created). In this "paradise", he then hoped to see his daughter Angela again, who somehow was sacrificed to the Witches in a ritual. He's been working with the Brain Trust and after his defeat by the GB duo, the Professor hired Akabane to kill him.
By nature, he's not an evil person; Maria noted that if he hadn't worked with the Brain Trust, he could have succeeded the Witch Queen given his powers (apparently, after the disappearance of Der Kaiser).