Princess Langwidere (a pun on the term "languid air", as enabled by her wealthy status and lazy carefree manner) appears in Baum's third Oz book Ozma of Oz (1907) as a secondary villain. She is the vain and spoiled princess whom Dorothy and her company encounter when she visits the Land of Ev which neighbors Oz. Langwidere has a collection of 30 exchangeable heads she keeps in a cabinet constructed of solid gold and studded with gems. The cabinet itself is held within a walk-in closet in the boudoir of Langwidere's palace. Each head is said to be extremely beautiful, consisting of different bone structures that represent different ethnicities and are kept in their own separate cases lined with mirrors that Langwidere keeps locked with a ruby key she wears around her left wrist. Instead of changing her clothing like most princesses, she simply changes her heads to match her current state of mood whenever she pleases. She is portrayed as being a very reclusive and selfish creature, with a terrible temper when she wears Head #17.
Langwidere has a meek-natured dutiful maid named Nanda. Upon spotting Nanda going about her duties around the castle, the Hungry Tiger regards her as exceptionally tasty-looking and eagerly requests her permission to eat her; being denied this privilege, he instead asks Nanda to whip up a sumptuous beef-and-potatoes feast for him, which she shakily agrees to, as her doing so will mean that she will both escape undevoured and temporarily take the edge off the Tiger's voracious appetite.
In the 1985 film Return to Oz, elements of Princess Langwidere were combined with the witch Mombi and is named Princess Mombi instead. She is an ally of the Nome King.
In the 2017 series Lost in Oz, though she doesn't appear directly, Langwidere is the real name of the Wicked Witch of the East, who in turn is the great great aunt of the original Wicked of the East.
