Princess Belle is one of the two protagonists of Disney's 1991 film Beauty and the Beast, and the 5th official Disney Princess and who also appears Sofia the First to help her earn her voice back.
Belle made a guest appearance in the episode "The Amulet and the Anthem".
She teaches Sofia that actions speak louder than words when apologizing about her bragging didn't break her croaking curse by singing "Make It Right".
Curiously, like Princess Jasmine before her, Belle's hairstyle is different than what her redesign shows. Rather than being waist length with a large sock bun and two free locks framing her face, the hairstyle that she sports in the episode is only just past her shoulders with the bun being the previous fancy knot that she had prior to her redesign. This is either because this version of the hairstyle was easier and less time-consuming to animate or the animators chose to combine aspects of her original hairstyle with her new one as a sort of homage to her first appearance.