This is a list of characters from the movie Monsters vs. Aliens and its spin-offs. Monsters Each of the main five characters are modeled after classic movie monsters. Susan Murphy (Ginormica) Susan Murphy (voiced by Reese Witherspoon in films, Riki Lindhome in the TV series), also known in the movie by her monster name Ginormica. Was once a normal woman who was hit by a radioactive meteorite on her wedding day, causing her to grow to a height of and transform into a Giantess. In addition to her size, she is particularly strong, physically impervious and has a resistance to energy attacks. She serves as the film's central character. She appears in the Halloween special Monsters vs. Aliens: Mutant Pumpkins from Outer Space. She makes a cameo in a cliffhanger at the beginning of Night of the Living Carrots. She is inspired by the protagonist of Attack of the 50-Foot Woman and her height is specified as just short of fifty feet. In the television series, she gained the ability to switch between her giant and normal sizes by growing and shrinking. B.O.B. (Benzoate Ostylezene Bicarbonate) B.O.B. (Benzoate Ostylezene Bicarbonate) (voiced by Seth Rogen in the film, Chip 'n Dale: Rescue Rangers and specials, Dave B. Mitchell in Madagascar Kartz, Eric Edelstein in the TV series) is an indestructible gelatinous mass. He was created when a genetically-altered tomato was injected with a chemically-altered ranch dessert topping, the resulting goo gained some form of consciousness. Despite being sentient, he literally and figuratively lacks a brain, and is the main comic relief character. His greatest strength lies in his ability to digest any substance. In the video game, B.O.B.'s gameplay does not require his arms, and so he lacks them altogether. It is revealed in "Night of the Living Carrots" that he had a fear of carrots due to being force-fed carrot purée in his youth, and at the end of the short was turned into a giant, zombie carrot. He is inspired by The Blob. Dr. Cockroach, Ph.D. Dr. Cockroach, Ph.D. (voiced by Hugh Laurie in the film, B.O.B.'s Big Break and Mutant Pumpkins from Outer Space, James Horan in Night of the Living Carrots and video game, Chris O'Dowd in the TV series) is a brilliant but mad scientist who built a pod-like invention to give humans the survival abilities of a cockroach, experimenting on himself. Now he has a