Bella is a Border Collie puppy who was chosen for Kevin to show that good manners are better than being bad to others. She's the teacher of the Pocketville School of Manners. Before Kate and her friends could send her to the Big City, Eva and her lackeys came to ruin that, but she managed to make them behave with the power of love. She apparently wrote a book on manners that was successful.
Bella practices what she preaches, as she is patient, refined and well-mannered herself. She is also kind to anyone. She is an excellent role model as a teacher. She is able to find a way to make anyone behave, and she can easily spot rude pets. She has mentioned she was unable to teach Eva manners.