Aaron's Dad is a Werewolf Hunter, which makes him the subject of mockery. He is taken to Bratvia to look for a real werewolf. He bumps into one that bites him and Aaron's Dad swears to hunt it down.
He finds a man named Ben that he think is the werewolf, but Aaron has doubts, especially after Ben saves him from drowning when he falls off the ship taking them back home.
Aaron eventually finds out that the wolf's bite gave him the werewolf curse, and he starts rampaging at night. He lets Ben go but discovers that he is a werewolf as well. His dad wants to get Aaron some help after being so callous to him and take down Ben.
Because Ben was nice to him, Aaron wants to save him. Eventually, Dad has two werewolves in his house and wants them to send them to top scientists. Aaron doesn't want this, so he bites his dad, making them a fearsome werewolf trio.
Aaron is a very serious person, he only believes in fact, until he learns that werewolves existed, and when he became one, he gained a fear of being alone, and not being able to do anything ever again.
Aaron has red hair, green eyes, and is tall and very skinny.
- There is another Goosebumps Series 2000 character named Aaron Freidus in the book Jekyll and Heidi, but the characters are in no way related.
- The boy named Aaron in Jekyll and Heidi has a mother, while the Aaron in The Werewolf in the Living Room does not.
- The Aaron in Jekyll and Heidi also has dark brown hair, while the Aaron in The Werewolf in the Living Room has red hair.