Tiger is the quaternary antagonist-turned-major character of Over the Hedge. He helped the animals to defeat their rivals.
Tiger has been shown to be pretty selfish, skeptical to strangers, and also quite protectful over his territory. His also shown as being very self-centered and "royal", in that he constantly talks about his beauty, and how he has inherited his beauty from generations of cats.
In the film, he orders Stella (who was disguised as a cat) to leave "with her filth", thus upsetting her and making her stand up to him. In turn, Tiger is amazed that someone stood up to him for the first time and thus, began to fall in love with Stella.