* ''Webcomic/AxisPowersHetalia'' fanfic ''[[https://www.fanfiction.net/s/11886910/1/Gankona-Unnachgiebig-Unità Gankona, Unnachgiebig, Unità]]'': [[YamatoNadeshiko Japan]] is ''very'' smart. He can also match [[DrillSergeantNasty Germany]] in combat ''despite being a full six inches shorter and much thinner.''
* ''Fanfic/ACrownOfStars'': In this story [[WoobieDestroyerOfWorlds Shinji]] has a degree on Philosophy and [[BrokenAce Asuka]] another on Advanced Mathematics. Shinji's time studying Philosophy often comes up, and Asuka has been seen reading up on Mathematics.
* ''Fanfic/AdviceAndTrust'': Asuka is the best HumongousMecha pilot in the story and she is also a certified genius.
* ''Fanfic/TheChildOfLove'': Asuka is mainly a fighter and a warrior, but she is also a fourteen-years-old genius with a college degree. In chapter 7 [[spoiler:she could not sortie to fight a giant alien, but she contributed with her strategic expertise and thanks to her tactics her teammates managed to win that battle.]]
* ''Manga/{{Evangelion 303}}'': Asuka is a commander of the USAF and an elite pilot of experimental jet fighters. Her profession demands not only being a great fighter but also studying a lot, [[http://eva303.smackjeeves.com/comics/1046799/017/ as seen here]].
* ''Fanfic/{{HERZ}}'': Shinji is an HumongousMecha pilot -and he has been one for the past twelve years- and a music teacher.
* Impa in ''Fanfic/InSottoVoce'' is a warrior who likes to read. Zelda notes that this is a rare trait.
* ''Fanfic/LastChildOfKrypton'': In this story [[ShrinkingViolet Shinji]] is ''Franchise/{{Superman}}''. He also knows German and it is implied that he reads about a wide variety of subjects.
* ''Fanfic/ChasingTheShadow'' has Sakura, an average twelve year old girl [[spoiler:managing to keep up with the most gifted kids of their generation through sheer brains and guts]]
* In ''[[http://tvtropes.org/pmwiki/pmwiki.php/Fanfic/Legionnaire Legionnaire]]'', Twilight Sparkle turns into one of these over the course of getting trained by [[BadassArmy The Equestrian Legion]] for her mission to Tarhen.
* ''FanFic/TheSecondTry'' has Shinji and Asuka becoming milder examples of this trope by necessity, since they had to accumulate and learn the sum total of human knowledge after they're left being the only two humans left alive on Earth, and are pigeonholed into being a civilization of two.
* ''Fanfic/SurrogateOfZero'': Tabitha's a given since it's a ''LightNovel/TheFamiliarOfZero'' fic, but due to being the container of the [[AssimilationPlot Well of Souls]], [[Anime/NeonGenesisEvangelion Shinji]] has the sum of human knowledge stored in his head. He is also a ex-HumongousMecha AcePilot.
* In ''Fanfic/TailsOfTheOldRepublic'', Miles "Tails" Prower of ''Franchise/SonicTheHedgehog'' fame is now 14 years old, up from his canonical age of 8, and he can both kick ass and take names in ''Franchise/StarWars: VideoGame/KnightsOfTheOldRepublic''. When it's not trying to kill him, the technology he's surrounded with makes him drool like a kid at a candy store.
%% * ''FanFic/DumbledoresArmyAndTheYearOfDarkness'' shows just ''what'' happens when you get the Ravenclaws seriously riled up.
* In the ''Franchise/{{Pokemon}}'' story ''Fanfic/BraveNewWorld'', the first new addition to Team Aurabolt is a fat basement-dweller Squirtle with [[{{Cloudcuckoolander}} tenuous grasp on the]] [[MetaGuy difference between fiction and reality]]. He starts things off by pounding the crap out of the protagonist (who has already defeated entire armies) via ConfusionFu, proceeds to predict half the plot turns in the story, defeats homicidal demons via [[WebVideo/YuGiOhTheAbridgedSeries children's card games]] and a manifestation of the futility of life using ''nothing but logic'', stores entire arsenals in his shell, holds his own in direct combat, and generally embodies CrazyPrepared and CrazyAwesome.
* The protagonist/narrator of ''FanFic/TravelsThroughAzerothAndOutland'' fits this description.
* Yuuki Nagato of ''FanFic/SuzumiyaHaruhiNoSeitenkan'' is even more badass than the original Yuki Nagato.
* The fic [[Fanfic/DeliverUsFromEvilSeries Mortality]] shows ''what happens'' if you ''really'' get a mild-mannered doctor like Watson ''seriously'' [[BewareTheNiceOnes pissed off.]] It's NOT pretty. If you ''really'' manage to get him pissed, this mild-mannered doctor WILL [[TranquilFury calmly]] kill you.
** [[TooDumbToLive The captured criminal and Smith found this one out the hard way.]]
** Holmes too. He handed ass to a lot of other criminals but [[DistressedDude had a hard time with Smith, since he did get captured and tortured by the guy.]]
* Tara "Green Shield" Strong from Roleplay/DCNation. Yes, she is a SnarkKnight first and foremost, but this is someone who has a Masters at 19, is getting her M.D. by apprenticing under Doctor Mid-Nite, and ''got'' her abilities by playing ProfessorGuineaPig on herself to try and prevent her [[CorruptCorporateExecutive crooked boss]] from taking credit for her work. She's even studying ''alchemy'' in order to better keep up with the magical trouble the JSA attracts.
* John in ''Fanfic/WithStringsAttached'' qualifies. In RealLife he was a voracious reader, and a songwriting genius. In ''Strings'', he's transformed into a guy who can fly and lift half a ton (though not at the same time) and given a magical charm that makes him powerful enough to lift a river. [[ActualPacifist Not that he actually wants to do anything to you]]--unless you fuck with him or the others.
** Paul and George probably qualify as well.
* Harry in ''Fanfic/HarryPotterAndTheInvincibleTechnomage''. Not only is he on his way towards being as brilliant as his adopted father Tony, he also gets regular physical training from Hell by ''Captain America''.
* In ''FanFic/TheAgeOfWingsAndSteel'', Cranberry uses her knowledge of ancient history to save the team's quest in the north.
* The ''FanFic/PonyPOVSeries'' has Twilight Sparkle, of course, but there's also [[BadFuture Dark World]] Spike, who's spent the last thousand years as Discord's slave doing pretty much nothing but read to pass the time, from which he's learned a number of fighting techniques.
* ''FanFic/HarmonyTheory'': Star Fall is a scholar, magic talent, spy and powerful (by modern standards) mage, able to use her abilities in a fight.
* Starr from ''FanFic/{{Pokeumans}}'', despite being seen often in her dorm reading, has certain moments of awesome. The best of which being when they infiltrate Pokextinction's Pine Barrows base.
* ''MyLittlePonyFriendshipIsMagic'': Princess Luna, from FanFic/NightmaresAreTragic and FanFic/AllTheWayBack, is one of the two strongest Alicorns in Equestria, a highly-skilled mage and mistress of numerous weapons and fighting styles. She is also extremely knowledgeable in science, technology, history and the arts.
** ''FanFic/TheCelestiaCode'' features Twilight Sparkle again, as an alicorn. Her approach to dragon negotiation is step 1, offer barter; step 2, carefully applied violence. She also uses applied ''topography'' to change a spherical magical shield into a ''buzzsaw''.
* ''Fanfic/CaveStoryVersusIMMeen'' stars [[AscendedExtra Jack]] as quite possibly the most Main/BadassAdorable fanfiction character ''ever'', with incredible durability and persistence, a healthy balance of brains and brawn, and even [[spoiler: the abilty to use [[Manga/JojosBizarreAdventure ZA WARUDO.]]]]
* In ''Fanfic/ThousandShinji'', Shinji and Asuka take pride in both their fighting skills and their intellect. Even though Shinji is capable of beating almost anyone in physical combat, he considers his brain is his best weapon. And Asuka is thirteen and she already went to college.
-->'''Shinji:''' I presume then that you want me to help you with your written Japanese.\\
'''Asuka:''' If you could. I can help you with your homework, I took most of it already when I was in college.\\
'''Shinji:''' (squeaking because she's thirteen) You went to ''college''?\\
'''Asuka:''' Yeah, I graduated last year.\\
'''Shinji:''' Do you ''want'' to lose your virginity tonight? Because I am so turned on right now. Brains, beauty, and a degree in what I must presume is ass kicking, what more could a guy want?
* Fujuju from the ''Manga/SgtFrog'' ''FanFic/YinAndYangSeries'' seems like a quiet, bookish guy at first... only to end up being a dangerous pyromaniac.
* Victoria, Dorian, and Cullen all fall into this category in ''[[Fanfic/TwiceUponAnAge All This Sh*t is Twice as Weird]]''. All three are highly skilled in battle, and are also voracious readers with particular interest in history. It forms a CommonalityConnection for all of them.
* ''Fanfic/ForumOfThrones'': Dante is a {{Bookworm}} through and through, as well as a TechnicalPacifist, but make no mistake, he still ''is'' a knight and a [[BadassFamily Karstark]], meaning that he is far from a weak pushover.
* Rodrik Harlaw, nuncle to Theon and Asha Greyjoy, proves himself to be one in ''Fanfic/RobbReturns''. His epithet may be "the Reader", but he is perfectly capable of [[spoiler:leading the forces of his more militaristic goodbrother Victorian Greyjoy into a trap, as well as beating the man himself in single combat.]]
* ''FanFic/ThePiecesLieWhereTheyFell'': Page Turner might be a librarian, but you don't want to mess with her in a fight.