Belladonna is Annabelle's cousin who is a dog demon and Carface's master. She acts as a rival towards Charlie and Itchy. she really appears mainly in All Dogs Go to Heaven: The Series, because Carface portrays the main villain in the first movie, and the sequel is taken by a more powerful enemy named Red. She is rumored to be a long lost daughter of Malefor, making her Mirage's sister, but it's no secret because she's a dog, and Mirage is half cat, the two presumingly never really get along. Either way, it's not very well known when Belladonna will begin to make her appearance in the Spongebob and Friends series, or if she'll become a villain leader, or even take over Team Nefarious from Dr. Nefarious to try and take on Mirage. Again, it's not really well known.
- Belladonna and Carface will work for Satan and Saddam Hussein in Winnie the Pooh Goes to South Park: Bigger, Longer & Uncut. However, it is currently unknown whether or not that film will mark the first time Belladonna will become Winnie the Pooh's enemy since Pooh's Adventures of All Dogs Go to Heaven: The Series has still yet to be announced.
- Belladonna is a member of the Demon Council of Darkness.