Not much is known about Stella's past, other than the fact that she has disliked the fact that she is a skunk for quite some time. Due to this, her search for a mate has been unsuccessful and she is quite aggressive on the subject involving men.
Stella had just finished hibernating and it was spring. When the other animals refused to get out of the log, she made them get out by threatening to spray them. Penny is shown telling her she needs a man in her life, making her be increasingly rude and sassy, telling her to call her when they find a man who is "decent, good with kids, and has no sense of smell."
When Verne falls through the hedge, she threatens to spray it, thinking it ate him, until Verne reveals he simply tripped. When RJ arrives, he reveals all the food that the humans have, and convinces them to come and eat there. She eats from a trash can until she and the others are chased off by a woman named Gladys Sharp.
Later on, she helps RJ and the other animals steal from the humans. She plays a key role in one of them, hiding in a birthday cake and bursting out, scaring off all of the humans, allowing the animals to take the food, prompting Gladys to call the Verminator. After Verne loses all the food and makes a comment that hurts their feelings, RJ helps her and the others reconcile with him.
RJ then comes up with a plan to get all the food back by stealing it from Gladys' house. The first step is to get the collar from her pet cat Tiger. The animals put makeup on her to make her look like a cat. At first Tiger does not buy it, but after she starts tongue lashing him, which he sees as bold. They talk with each other about their lives while the animals steal the food. During the conversation, they start to fall in love.
The plan goes awry when Gladys awakens and sees the animals. Stella sprays the whole house, where it is revealed Tiger has no sense of smell. Dwayne then appears and tries to trap Stella in a net, but Tiger pushes her out of the way, getting caught instead. The animals are caught, except for RJ who escapes with the food. As they are taken away, RJ has a change of heart and pushes the wagon of food in front of the van, knocking the Verminator unconscious and freeing the animals. Stella is unforgiving and threatens to gas him until Verne convinces them he means good. At the end of the film, the animals are clebrating and Tiger escapes into the wild because he likes it now, and from what is shown, has now become Stella's boyfriend.
In the video game, Stella is one of the four playable characters. In the level "Steam Train," she says a mock name of the operation, which is "Operation Disembark."
Stella is sassy and has a short temper.
- In the console games, if Stella uses her special where the player holds the button, there is a chance she'll say, "Hope you can't smell!" This is a reference to her boyfriend, Tiger, and how he can't smell. This is revealed when she fills Gladys' home with spray.