Welcome to the Moms Panel, Cassie! I love your question because my 7-year-old daughter is a huge fan of Belle. Your cousin is going to have a magical time meeting the brainy and beautiful Belle in person!
I personally think the best Character Dining experience which features Belle is
Princess Storybook Dining at Akershus Royal Banquet Hall in the Norway Pavilion at EPCOT. The Akershus Castle is a lovely location and the cuisine is quite good. Several of Belle's princess friends also stop by to visit with Guests dining at Akershus.
I also highly recommend enjoying a meal at
Be Our Guest restaurant in Beast's Castle. The incredible theming and special touches are guaranteed to make your cousin feel as if she's magically been transported into the world of
Disney's Beauty and Beast! Be sure to make advanced dining reservations up to 180 days in advance of your arrival by calling 407-WDW-DINE or visiting the online Walt Disney World Resort Dining Reservations page.
When you arrive in Magic Kingdom Park, head straight to New Fantasyland and
Enchanted Tales with Belle where your cousin can play a role in the "tale as old as time." This interactive experience takes place in the Beast's library and is hosted by Belle and Lumiere. It is so much fun for the entire family! You also won't want to miss
Beauty and the Beast - Live on Stage at Disney's Hollywood Studios.
Wishing you a magical vacation! Please don't hesitate to write me back if I can assist you further with planning your "Disney Time".