Anita "Needy" Lesnicki (Amanda Seyfried) is the narrator and hero of the 2009 film Jennifer's Body.
The movie starts with Needy being her popular best friend, Jennifer's, nerdy sidekick. The two have an unusually close friendship. Early on it seems that Needy's boyfriend, Chip, is not the biggest fan of Jennifer. He gets frustrated that Jennifer seems to take advantage of Needy's friendship. Needy is not allowed to be prettier than Jennifer and always has to do what Jennifer says. Jennifer is vain and takes it for granted that her good looks are enough to make everything go her way.
Even though Needy has a boyfriend, the main relationship of the movie is between Needy and Jennifer. Before Jennifer is kidnapped and turned into a succubus during a satanic ritual, the two seem to have a psychic bond.
Later on, it is clear that there has also been a sexual element to their friendship that both seem to enjoy.
When Needy first finds out that Jennifer is literally consuming men, she tries to protect her. However, the rising body count disturbs her.
When Jennifer decides to eat Chip, Needy realizes that a lot of the time Jennifer had just been using her as well. Although she is too late to save Chip, Needy does fight and kill Jennifer.
Needy is sent to an asylum for murdering her friend. It's there that we learn that she was bitten by Jennifer and got some of her powers. She uses those powers to escape the asylum and kill the men who kidnapped Jennifer.