Isabelle is a friendly shihtzu dog in the Animal Crossing Series. She is the assistant to the player, who takes the role as the mayor of their town. Isabelle first debuts in Animal Crossing: New Leaf, and later in as an assist trophy in the Super Smash Bros. series, and downloadable content in both the Mario Kart series and Monster Hunter 4. She would later debut in Super Smash Bros. Ultimate as a fighter.
Isabelle has a twin brother named Digby, who works at the Happy Home Showcase. Isabelle also appears to have a crush on K.K. Slider.