* Esmeralda from ''Literature/TheHunchbackOfNotreDame'' changed from TheIngenue in the original story to an ActionGirl in the [[Disney/TheHunchbackOfNotreDame Disney animated version]].
* [[OurDragonsAreDifferent Toothless]] of ''Literature/HowToTrainYourDragon'' went from a tiny green dragon which could fit on [[ABoyAndHisX Hiccup's]] shoulder in the book series to a Night Fury, decribed as "the unholy offspring of lightning and death itself;" the dragon every viking fears most -- rather, the ''only'' dragon vikings fear in [[Film/HowToTrainYourDragon the film adaptation]].
* [[ActionGirl Rapunzel]] from ''Disney/{{Tangled}}''.
** Technically, you could say ''everyone'' in ''Tangled,'' since the original story doesn't really have any sort of "action." [[BigBad Gothel]] is a sort of weird example--she becomes more {{Badass}} by becoming ''less'' powerful, going from a witch in the fairy tale to a knife-wielding badass (she knows a spell to retain her youth but otherwise seems powerless).
* In the original ''[[Literature/TheJungleBook Jungle Book]]'' novel, [[BigBad Shere Khan]] was portrayed as being crippled due to a leg deformity he received during birth, and was a rather pathetic SmugSnake to boot. In the [[Disney/TheJungleBook Disney adaptation]], however, Khan is portrayed as a menacing, bloodthirsty, yet [[LargeHam hammy]] and [[LaughablyEvil whimsical]] predator who is feared by everyone in the Indian jungle and is constantly determined to kill Mowgli for being a human. In the sequel, however, he is [[KnightofCerebus flat out]] menacing.
** And in Soviet animated adaptation, Shere Khan is a scary villain from his very first appearance.
*** Though it goes both ways, as Shere Khan is a lot more cunning and manipulative in the book.
** This seems to make the anthropomorphic transition as well, if ''WesternAnimation/TaleSpin'' is of any evidence. A ruthless and extremely savvy business man that could easily have Baloo hunted down and crushed [[ScrewTheMoneyIHaveRules if not for his moral code]].
* In the original book of ''Literature/SleepingBeauty'', there was a minor villain known as The Evil Fairy. When the book was [[Disney/SleepingBeauty adapted into a film]], that minor baddie was morphed into Maleficent, one of the most badass Disney villains to date.
* ''WesternAnimation/RiseOfTheGuardians'' lives by this trope. Santa is a former Russian bandit who duel-wields swords and goes by "North", the Easter Bunny is an AwesomeAussie with boomerangs as weapons, the Sandman is the most badass out of all of them, and the Tooth Fairy, while the weakest, can definitely hold her own in a fight. Jack Frost has also been de-aged and very powerful, while Pitch Black the Boogeyman is capable of taking them ''all'' on.
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