History Main / APupilOfMineUntilHeTurnedToEvil

* ''DungeonsAndDragons'' ForgottenRealms setting. The Shadowsil was an archmage who was originally an apprentice to Elminster before she became evil.
** ...Sammaster (for a time), Raerlin (has a dubious achievement of saying "Death has come for you at last, Old Mage" twice -- once while still alive, once as a lich), and so on. And on.
*** And the ''Series/DungeonsAndDragons'' cartoon. The Dungeon Master revealed that Venger was a former pupil. In the unaired series finale Venger is revealed to be Dungeon Master's son.

* In ''KungFuPanda'', Tai Lung was not only Shifu's first pupil, but also his [[UsedToBeASweetKid adopted son]]. Tai Lung's HeelFaceTurn was a direct result of their screwed up relationship.

* In ''KungFuPanda'', Tai Lung was not only Shifu's first pupil, but also his [[UsedToBeASweetKid adopted son]]. Tai Lung's HeelFaceTurn was a direct result of their screwed up relationship.

* According to [[AllThereInTheManual the manual]] for the original ''{{Banjo-Kazooie}},'' Gruntilda the witch was a student of Mumbo-Jumbo's until she turned evil... and to pay him back, she turned his head into a skull-shaped metal mask. It seems to have been {{Ret Con}}ned, though, with ''Grunty's Revenge'' (which takes place in the past) has Mumbo Jumbo as an up-and-coming shaman without a pupil... and a face that's still skull-shaped.

* Betelgeuse in the movie {{Beetlejuice}}, worked for afterlife case worker Juno before he became a "freelance bio-exorcist."

* ''TheLegendOfZelda: The Minish Cap'': Said by Ezlo about Vaati, who "became enchanted by the wickedness in the hearts of men."
* In ''{{Alice 19th}}'', Darva was originally Master Lotsuan's disciple.
* Played word-for-word straight by Jarrod in ''[[PowerRangers Power Rangers: Jungle Fury]]''. His counterpart in ''JukenSentaiGekiranger'' follows roughly the same path, but there is no single trigger that causes him to switch: he simply becomes dissatisfied with the progress he's making under the good guys.

* Not quite clear whether the [[DoctorStrange Ancient One's]] other disciple was this or a DeceptiveDisciple, maybe a little of both.

* ''{{Naruto}}'' offers both Orochimaru and Sasuke. Orochimaru was considered the village's best ninja when he was in Konoha, then got fed up with things and left for his various evil deeds. Sasuke was lured away by Orochimaru.
** There's also [[spoiler:Nagato, [[NamesToRunAwayFromReallyFast also known as Pain]], a former apprentice of Jiraiya]]. More of a WellIntentionedExtremist, but he still qualifies because he puts such a ''heavy'' emphasis on the "extremist" part.
* A slight variation in TheAmazingScrewOnHead: Emperor Zombie used to be Head's manservant until he turned to evil.
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* The villain of ''KungFuPanda''.

A mentor once had a student, perhaps the mentor's most promising and skilled student ever. But that student had a flaw, a seed of villainy that just needs a trigger. Usually it's arrogance about his/her skills or impatience at not being taught the final skills that the mentor has yet to teach. Then the student [[FaceHeelTurn becomes a villain]], even the BigBad.

* In the [[AvatarTheLastAirbender Avatar]] episode "The Deserter", Master Jeong Jeong mentions to Aang that years before, he had a pupil obsessed with the power of fire, but cared little for focus or self-control.We later discover he was talking about [[spoiler: Admiral Zhao]].

* Of the first ''FireEmblem'' [[TheDragon Garnef]] is an ex-pupil of Gato's. This part of the reason why [[RestoredMyFaithInHumanity Gato lacks faith in humanity]].

* Zhao for Jeong Jeong in ''Avatar: The Last Airbender''.

* In AvatarTheLastAirbender, we have Commander (later Admiral) Zhao, who was once [[BadassGrandpa Jeong Jeong's]] student.

* Played word-for-word straight by Jarrod in ''[[PowerRangers Power Rangers: Jungle Fury]]''. His counterpart in ''JuukenSentaiGekiranger'' follows roughly the same path, but there is no single trigger that causes him to switch: he simply becomes dissatisfied with the progress he's making under the good guys.

* [[SmugSnake Zhao]] for Jeong Jeong in ''AvatarTheLastAirbender'':
-->'''Jeong Jeong''': I had a pupil once who had no interest in learning discipline. He was only concerned with the power of fire - how he could use it to destroy his opponents and wipe out the obstacles in his path.

* Jeong Jeong from ''AvatarTheLastAirbender'' mentions a rogue student, later revealed to be Admiral Zhao.
-->"I had a pupil once who had no interest in learning discipline. He was only concerned with the power of fire - how he could use it to destroy his opponents and wipe out the obstacles in his path."

** And mirrored in the prequel trilogy with [[TheStarscream Dooku]], who was [[TheYoda Yoda]]'s pupil before his [[HeelFaceTurn Heel Face Turn]].

[[redirect:PupilTurnedEvil]]

A mentor once had a student, perhaps the mentor's most promising and skilled student ever. But that student had a flaw, a seed of villainy that just needs a trigger. Usually it's arrogance about his/her skills or impatience at not being taught the final skills that the mentor has yet to teach. Then the student [[FaceHeelTurn becomes a villain]], even the BigBad.

Sometimes the mentor is the protagonist, and will have to take the student down in the story. But far more often the protagonist is [[MasterApprenticeChain another student the mentor takes on]].

Compare DeceptiveDisciple (when the student was evil the whole time, just pretending not to be), FallenHero and TheParagonAlwaysRebels.
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!!Examples:
* [[TropeNamer Named]] for a line in ''StarWars Episode IV: ANewHope'', about how Obi Wan describes Vader.
** And mirrored in the prequel trilogy with [[TheStarscream Dooku]], who was [[TheYoda Yoda]]'s pupil before his [[HeelFaceTurn Heel Face Turn]].
* The villain of ''KungFuPanda''.
* Morzan for Oromis in ''{{Eragon}}''.
* According to [[AllThereInTheManual the manual]] for the original ''{{Banjo-Kazooie}},'' Gruntilda the witch was a student of Mumbo-Jumbo's until she turned evil... and to pay him back, she turned his head into a skull-shaped metal mask. It seems to have been {{Ret Con}}ned, though, with ''Grunty's Revenge'' (which takes place in the past) has Mumbo Jumbo as an up-and-coming shaman without a pupil... and a face that's still skull-shaped.
* ''DungeonsAndDragons'' ForgottenRealms setting. The Shadowsil was an archmage who was originally an apprentice to Elminster before she became evil.
** ...Sammaster (for a time), Raerlin (has a dubious achievement of saying "Death has come for you at last, Old Mage" twice -- once while still alive, once as a lich), and so on. And on.
*** And the ''Series/DungeonsAndDragons'' cartoon. The Dungeon Master revealed that Venger was a former pupil. In the unaired series finale Venger is revealed to be Dungeon Master's son.
* Betelgeuse in the movie {{Beetlejuice}}, worked for afterlife case worker Juno before he became a "freelance bio-exorcist."
* Of the first ''FireEmblem'' [[TheDragon Garnef]] is an ex-pupil of Gato's. This part of the reason why [[RestoredMyFaithInHumanity Gato lacks faith in humanity]].
* ''TheLegendOfZelda: The Minish Cap'': Said by Ezlo about Vaati, who "became enchanted by the wickedness in the hearts of men."
* In ''{{Alice 19th}}'', Darva was originally Master Lotsuan's disciple.
* Played word-for-word straight by Jarrod in ''[[PowerRangers Power Rangers: Jungle Fury]]''. His counterpart in ''JuukenSentaiGekiranger'' follows roughly the same path, but there is no single trigger that causes him to switch: he simply becomes dissatisfied with the progress he's making under the good guys.
* Vargas in ''FinalFantasyVI''.
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** And mirrored in the prequel trilogy with [[TheStarscream Dooku]], who was once a Jedi until his [[HeelFaceTurn Heel Face Turn]].

* Named for a line in ''StarWars Episode IV: ANewHope'', about how Obi Wan describes Vader.

Compare DeceptiveDisciple (when the student was evil the whole time, just pretending not to be), FallenHero.