Jennifer "Jenny" Bennett is the tritagonist. She is an intelligent 11 year old girl who attends an all-girls school named Westbook Prep. Both DJ Walters and Chowder have crushes on her, but she only returns DJ's feelings and becomes his girlfriend.
Role in the film[]
Meeting DJ and Chowder[]
DJ and Chowder first spot her going to Nebbercracker's house, and they rush out to warn her, managing to save her before she is eaten by the house. After Zee leaves to go and find Bones, DJ (pretending to have hit puberty) tells her to have fun and safe driving. Jenny asks why DJ was acting like a idiot but he says that he made the whole puberty thing up and the two introduce themselves then went inside DJ's house. The trio then introduce themselves and begin to talk about the house mocking them with its "Houseness". While Jenny speaks to her mom on the phone, DJ and Chowder talk about hating Mexican food and "calling dibs on a girl". The trio then see a dog named Kevin starting to pee on Nebbercracker's lawn. The house then grabs Kevin with its carpet (the tongue) and eats him.
Jenny decides to call for the police, but when police officers Landers and Lester arrive, they do not believe their story, as the house does not react to the kids' teasing while the cops are there. The three realize that no one is going to believe their experience with the house and decided to keep it to themselves.
The trio seek advice from Reginald "Skull" Skulinski, a strange video game addict working in a pizza parlor who is claimed to be an expert on the supernatural. They learn that the house is a "domus mactabilis" (Latin for "deadly home"); a monstrous being created when a human soul merges with a structure. They assume the house is possessed by Nebbercracker's soul. The only way to kill the house is to destroy its source of life; the heart. They conclude that the heart must be the furnace, as DJ realizes that the chimney has been smoking since Nebbercracker died.
Planning to Kill the House[]
As they make a plan to kill the house, Chowder provides a dummy filled with cold medicine that should cause the house to sleep long enough for them to douse the furnace. The plan almost succeeds, but Officers Landers and Lester arrive and thwart it. Landers discovers the cold medicine inside the dummy, which Chowder took from his father's pharmacy, and arrests them. The cops wrongfully place the trio in the police car while they examine the house. The house eats Landers, Lister, and the car. DJ, Chowder, and Jenny escape the car but are trapped in the house.
Exploring the House[]
The house falls asleep and they begin exploring. They make a plan to find the heart and put out the fire while Chowder asks if there is more options. Which DJ agrees; wait and do nothing until the house finds out where they are and it will eat them, Chowder disagrees with that idea and goes on with the plan to find the heart and put the fire out. DJ finds binoculars on the wall near a small hatch to the door and he realizes that Nebbercracker has been watching him the whole time while he was trying to get Chowder's ball back. Jenny then shows DJ a set of photos with Nebbercracker and his late wife, then DJ says to Jenny that he used to have a wife, but he fattened her up and ate her, much to Jenny's disgust.
While exploring, Chowder mistakes the chandelier (the uvula) for the heart, they shoot which causes the house to vomit a little bit of water outside and a search light which is the monster's eye appears to find any intruders inside the house's interior. Jenny explains to Chowder that the chandelier is the uvula and it stimulates the gag reflex and everyone has a uvula. The house then dozes off again and the search light disappears.
DJ, Chowder and Jenny then fall into the basement and find an enormous collection of toys accumulated from Nebbercracker's lawn, as well as a locked cage that DJ opens with a key he found on the lawn. They find the body of Constance the Giantess, Nebbercracker's wife, encased in cement. They begin to find out why Nebbercracker did this to his wife until DJ accidentally falls onto the body and screams in terror as it cracks open to reveal a skeleton. The house realizes they are inside and begins attacking them. As Jenny and Chowder were captured by springs and snake-like pipes, DJ walks up the basement stairs until the stairs start to attack him as he climbs up to the first floor. Jenny forced the house to vomit them outside by grabbing onto its uvula. As DJ and Chowder argue about their ideas, and that Chowder risked his life for DJ for stealing drugs for him and DJ says that it was Chowder's idea to make DJ retrieve Chowder's ball back and DJ then hastily heads for home. As he does, he nearly gets run over by an ambulance hijacked by Nebbercracker and the trio are surprised to see that arrives home alive, but with his arm in a sling.
Nebbercracker then lashes them out to leave, but his wrath was quickly changed into worries as he realized that kids would be approaching his house. He then starts walking towards his house which somewhat became gentle to him. By this point, DJ learned that all this time, the house was possessed by Constance's spirit.
Final Fight[]
Against his friends' protests, DJ tries to talk some sense with Nebbercracker about the truth behind his wrathful and suspicious behavior. Nebbercracker was at first angry after he has discovered the truth, but eventually relents and tells them their story. All of his bad deeds on the children were merely ruse to keep them away from his house after the latter's accidental murder by bullies and because of it, he was forced to pretend to be a child hater so Constance won't be able to destroy everything on her path.
DJ tells Nebbercracker it is time to let Constance go, but she overhears. The house breaks free from its foundation, with trees to support it (the arms), and chases the group to a nearby construction site. As the house tries to eat Nebbercracker, Chowder fights the house off with an excavator, causing it to fall into a pit.
DJ is given the dynamite, and he and Jenny get accidentally thrown into the huge pit where a lake has been drained. Chowder managed to bring the house down into the pit where it crumbled to pieces. Thinking that they have won, they cheered until the house starts to reconstruct itself by making it a deformed monstrosity. DJ and Jenny then climb to the top of a crane while Chowder distracts house and the excavator is eaten. When DJ and Jenny reach the crane's arm, DJ was very scared to do it, but Jenny tells him that he can and kisses him with encouragement, giving him the confidence to do so. DJ then throws the dynamite into the chimney, blowing up the house. The trio see Nebbercracker dancing with Constance's spirit before she fades away.
DJ apologizes to Nebbercracker for the loss of his house and wife, but Nebbercracker thanks DJ and the kids for freeing him and Constance after 45 years of being trapped. That night, children in their Halloween costumes are all lined up at the site of Nebbercracker's house, where DJ, Chowder, and Jenny help him return all of the toys to their owners. Jenny's mom picks her up, and hugs DJ and Chowder before leaving.