The second "uber-villain" in my Digimon story, the pirate SkullRenamon, better known as "Captain Mange" to her crew, actually hatched from the same digitama as Shadow did. Her jealousy over Shadow and Fang's friendship allowed her to be twisted into this mockery of life, where she now serves a darker force by spreading the Black Cards across the Digital World, allowing the Black Emperor to secure his hold on it, while searching constantly for her sister.
At her side is Demiparrotmon, first mate, major domo, and overseer/voicebox for her when she cannot be about. A weak-willed bully who abuses the power-by-association granted him by Captain Mange, Demiparrotmon also serves the Black Emperor directly by keeping Mange focused on her mission, sometimes going so far as to distract and sabotage her efforts to locate Fang and Shadow.