Rabbit is one of Pooh Bear's best friends (he said so himself) and he's very careful (he doesn't always say that he's home). He makes the best out of every situation (like when Pooh was stuck in his front door) and always takes care of his friends.
When Kanga and Roo came to the forest he wanted them to stay out and he made a plan to scare them away. But after the plan failed he became one of their best friends.