Portia Gibbons

Portia Gibbons is a recurring villain of the 2008 animated television series The Mighty B and also one of the three secondary villains of the 2010 animated horror film Alvin and the Chipmunks: The Demonic Possession. She is voiced by Grey DeLisle, who is well known for voicing Vicki, Toothy, and Veronica from The Fairly Odd Parents, Prince Azula from Avatar: The Last Air Bender, Daphne Blake from Scooby-Doo series, Samantha Manson from Danny Phantom, Kitty Katswell from Tuff Puppy, Riley Daring from The Replacements, Brianna Buttowski from Kick Buttowski, and Lizzie "Elizabeth" Divine from Code Name: Kids Next Door.

History
Little is known of Portia Gibbons before her first encountered with Donald Walls, but it is known that she was the leader of a group of bikers, and two of her members were Gary (Jason Marsden) and Gwendolyn Wu (Jessica DiCicco).

In the summer of 2000, Portia, Gary, and Gwendolyn stop at a small convenience store at Monterrey Park. Gary and Portia held Alvin Seville (Justin Long) hostage while Gwendolyn was making trouble for Simon (Matthew Gray Gubler). When she has Alvin's thrown Burmese python wallet, she wants Simon to ask her politely for the Burmese python wallet back with a word "Gwen", so Gwendolyn does. Both Portia and Gary let Alvin go. While he and Simon get ready to leave, Portia was outside in front of the store drinking a can of grape Fanta as she sees Alvin and Simon inside the car. When Alvin starts the car, Portia begins smashing the windshield of a car that Alvin was driving. However, due to his clumsiness, Alvin accidentally runs over their motorcycles as revenge for troubling him and Simon, causing Portia to fume and shout in anger while Simon praises Alvin as they drive away.

The three bikers stop at the suburbs of Riverside. Portia goes to a haunted house across from Bessie's house and discovers Gary dead. When she sees Donald Walls (posing as Theodore Seville) jumping down, she grabs a meat cleaver, hoping to defend herself from the bloodthirsty killer. Theodore/Donald continues his scope out of the haunted house, only to have Portia appear and start attacking him with a meat cleaver. Theodore/Donald counterattacks by hitting Portia with an umbrella. While Theodore/Donald is trying to kill April O'Neil (Mae Whitman), she runs into the haunted house. She is suddenly met by Portia, who survived the earlier fight with Theodore/Donald. Enraged, Theodore/Donald turns his attention to Portia by using a meat cleaver to chops off her left hand. April continues running in fear as Portia screams in horror after Theodore/Donald chops off her left hand and continuously hacked her to death with a meat cleaver. Portia's one-handed corpse, was later found and eventually taken away by the paramedics.