Scary Disney Princesses

Other Disney characters have appeared in franchise merchandise, but aren't considered part of the Disney Princess franchise.
Alice (from Alice in Wonderland) was included in the PlayStation 2 game Kingdom Hearts as one of the Princesses of Heart, all of whom were official Disney Princesses besides her (and the game's original princess, Kairi). Alice has appeared in official Disney Princess art, and is included in the Disney Princess music video It's Not Just Make Believe and The Perfect Princess Tea with the then eight official princesses, though she still remains excluded from the official lineup.
Tinker Bell was once included under the principle that the princess need not be of royal heritage. However, it was decided she was not suited for the series "mythology". She now stars in her own Disney franchise, the Disney Fairies.
Giselle from Disney's film Enchanted was originally going to be added to the line until the company realized it would have to pay the actress, Amy Adams, royalties for using her likeness.