What you get when you combine IllGirl[=/=]LittlestCancerPatient with HandicappedBadass and TheGift.

This Character is extremely skilled in a fight. Often applying brains over brawn in order to win with little effort. However, when pushed too hard he may collapse in a coughing fit, or pass out post battle. He may find it hard to train, as he has to take it easy, but his talent allows him to keep up with other characters.

This may be caused by a weak immune system and frequent sicknesses that sap his strength, a single disease such as consumption or epilepsy, or might just be born with a weak body (such as a malformed heart).

This character might depend on WaifFu and is likely to be a FragileSpeedster. Expect to him to be WeakButSkilled.

A common occurrence would be for this character to be ambushed because of his weak appearance, then fight off his attackers, only to collapse after the fight has ended

A subtrope of HandicappedBadass, if the character is old then he is likely to also be a BadassGrandpa. May or may not be a TeenGenius or a ChildProdigy.
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! Examples

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[[folder: Anime And Manga ]]

* Captain Ukitake from ''Manga/{{Bleach}}''. Even though he's one of the most powerful Soul Reapers, his illness seems to prevent him from fighting for very long, and he appears to lapse into coughing fits at inopportune moments.
* Kurogane Hiroto in ''Kurogane'' (not the one on this wiki). Because of his weak body Hiroto was always the worst at sports. But when he takes up kendo his excellent eyesight allows him to avoid being hit by his opponents. At one point he faints because he's unused to the weight on the kendo armor. Waiting to see if he can strengthen his body or not.
* Kimimaru from ''Manga/{{Naruto}}''. He's dying from an incurable disease which should have left him unable to move let alone fight, yet has no problem taking on a Kyuubi-empowered Naruto, Lee, and Gaara. The only reason he fails to deliver a death blow to the latter two is that his body simply gave out mid-strike.
* Kashitarou in ''Manga/{{Gamaran}}''. So weak he can't swing a full katana, he uses a wakazashi instead and focuses on extreme control of his movements, in particular eliminating wasted movements.
* Papillion from ''manga/BusouRenkin'', an alchemist who successfully creates several homonculi before upgrading himself in hopes of curing his IncurableCoughOfDeath and giving him superpowers. The getting superpowers part worked, but he was still physically frail and coughing.
* Izumi from ''Manga/FullmetalAlchemist,'' despite her insistence to the contrary, is a powerful alchemist and all-around badass who famously survived for a month in the frozen wastes of Briggs by [[RefugeInAudacity raiding the military outpost there for supplies]]. However, she lost several of her internal organs to the Portal of Truth when she attempted human transmutation in order to resurrect her baby; she's still no less badass than before, but tends to break down coughing up blood if she exerts herself for too long. [[spoiler: In the first anime, she dies in between the end of the series and TheMovie; in the second series and the manga, Ed and Al's father Hohenheim gives her an "alchemy punch" of sorts that cannot restore her lost organs, but ''does'' stop the bleeding more or less permanently.]]

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[[folder: Literature ]]

* ElricOfMelnibone is physically frail and weak, requiring him to depend on either herbal medicine or his LifeEnergy draining sword Stormbringer for the strength necessary to fight. However, when he has the strength he's an excellent fighter.
* Jem from The Infernal Devices series. He's addicted to a drug that kills him slowly but the withdrawal will kill him if he doesn't take it. So he takes as little as possible, but as the drug also gives him energy this causes him to appear very frail. Yet he is more than capable of fending for himself against the demons he frequently encounters.
* The {{Dragonlance}} series of books has Raistlin, at least when he's human in the earlier books. Ridiculously powerful mage from a very early age, but also sickly and prone to coughing up blood.

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[[folder: Manhwa ]]

* Subverted in ''Manhwa/TheBreaker'', while Shi Woon originally had such bad ki circulation that he couldn't exercise without fainting the AppliedPhlebotinum fixed his health issues.


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[[folder: Tabletop Games ]]

* Teclis in TabletopGame/{{Warhammer}} is one of the greatest mages on the planet, but is extremely [[SquishyWizard squishy]], requiring potions just to stay alive.