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So you like a television show which features a male character named Bob who has(or seems to have) subtle sexual tension with another male character, Charlie. Bob's a BadassBig Guy who takes no guff from anyone and will pull a gun on anyone who deserves it. You like the show, so you idly open up a Fan Fic by some author named YaoiGrrl33 and—huh? The ass-kicking character you liked so much has consummated his sexual attraction with Charlie, but in the process he has somehow become a submissive Non-Action Guy. Bob is now prone to Luminescent Blushes and shaky sighs whenever Charlie so much as looks at him, gives hesitant and protracted confessions about past traumas, and — when he finally does shoot an attacker to save Charlie's life — drops his gun and breaks down crying. What.
Congratulations: you've just seen Wimpification at work.
This is a male equivalent to Chickification in which a Fan Fic writer depicts a character as more physically and emotionally vulnerable than he is in canon in order to facilitate a sexual relationship with a canon character of the same sex. This can be Hurt/Comfort Fic, but there is one difference. In a Hurt/Comfort Fic, the writer breaks Bob with trauma so that Charlie can comfort him, often leading to a pairing. With Wimpification, there is no explanation for Bob's drastic personality change, except perhaps a Hand Wave, and the change is done, by definition, to make it easier to write his relationship with Charlie. Additionally, the 'comfort' upward-trend of the Hurt-Comfort plot is usually omitted, leaving the now-broken Bob in permanent need of a dominant, assertive Seme.
Of course, Tropes Are Tools and this may be done well (or at least subtly enough so as not to jar the reader). One way is to explore a character's existing, canonically established flaws and foibles. Another way is to put both parties through the emotional wringer, leaving them on more or less equal footing while keeping the vulnerability which drives this trope.
This trope is loaded with potential Unfortunate Implications, mostly by insinuating a correlation between masculinity and positional preference in bed. In layman's terms, this trope can create the impression that "real men don't take it in the ass" and "taking it in the ass makes you a lesser man." It doesn't help the fact that views such as these are not unheard of among men that experience a level of same-sex attraction.
So readers generally agree that this is a trope best avoided. As with this trope's Distaff Counterpart, Chickification, when used in heterosexual and lesbian fanfic in a similar manner (i.e. to make one partner's character far more vulnerable in order to justify a certain fetish or relationship), it gets the desired relationship by making one party inexplicably need the other instead of taking the time to put them together plausibly. The fact that both Wimpification and Chickification seem to show up in similar proportions no matter whether used in Het or gay fanfic indicates that the tropes' prevalence has less to do with Unfortunate Implications regarding gay relationships and more to do with fetishistic fantasy-fulfillment centered around sexual exploitation of vulnerable characters (Because that makes things so much better).
In drawn fanworks, comics or doujinshi where the artist depicts the characters using a different/stylized art style than what is used canonically or in most other fanworks - particularly one you have never seen before or where all the characters look different from what you are familiar with - this trope is not present unless the character in question is either acting Out of Character in a Wimpification manner and/or is drawn much smaller and more feminine than the other characters. A drawing style where everyone is similarly different is not this trope. Please keep this in mind.
Anime fans refer to this process as ukefication (see Uke).
Subtrope of Out of Character. See Adaptational Wimp for non Slash Fic or gender related version of this. Compare Badass Decay, for when a character becomes a wimp within a single work.
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Any even slightly feminine (or even just less masculine/shorter than the designated partner) character is almost guaranteed to be put through this repeatedly. Heck, even the super manly characters will probably be subject to this at least once as part of a subversion or gag, this trope is just that common.
While a lot of Yaoi manga are written clearly for PWP and/or Smut purposes with wildly typical (and ridiculous) stereotypes amongst the characters, some generally well-written or at least intriguing BL manga might, in a clumsy stroke of depiction, mismanage the personality of the character designated as the "uke/neko/bottom," transforming him from a strong/quirky/interesting independent character to a weepy generic Moe-blob in (and worse, out) of bed once he and his love interest get together.
Minotaur's Sex Tips For Slash Writers has this to say about it:
One thing to be wary of is writing one partner as the "wife". Men, even gay men, are trained to be less emotionally open, less demonstrative. Yes, we do feel, and even occasionally cry, but gay men are every bit as emotionally closeted as their straight counterparts. Think of all the troubles you have in your relationships with men, and then double them. Instead of just one partner being distant, uncommunicative and emotionally stunted, both are.
Canon example: At the beginning of the Gravitation manga, Shuichi is much more masculine than he is at the end. His character design even became more feminine over time until he became virtually indistinguishable from a girl by the start of the Gravitation EX sequel.
Even then, far too many Gravitation fanfics ukefy Shuichi even further until he becomes a 100% weepy uke, completely ignoring that he's been shown capable of standing up for himself when needed in canon even when Yuki is being a prick to him.
The anime basically bypasses this and goes right to making Shuichi extremely feminine from the get-go, right down to his voice. It's entirely possible to just imagine that his gender is different under his clothes with no further change needed to make the series hetero...
Levi also gets the same treatment. In the anime, he's the stoic, dead-eyed squad leader with the moniker "Humanity's Strongest". In fanart, his less than imposing height is often exaggerated and he's often pictured clinging to Eren or Erwin.
Bertolt Hoover gets this as well, sure he is a quiet and cowardly guy who has horrible self esteem, but this goes up to eleven in fanfiction that pairs him with Reiner, and sometimes Annie.
Ishida Yamato from Digimon Adventure gets this a lot. Though if they swap roles Yagami Taichi also has serious history of this.
Ken, Daisuke and Takeru also got their own moment each in fandom.
Sanji from One Piece is often made into a weepy uke because of his Bishōnen looks and attempts to be sensitive to women, regardless of the fact that Sanji is frequently a jerkass to his male crewmates and is nowhere near unable to stand up for himself.
This is also likely why many fangirls were upset with his design after the time skip. Frequently, in fan art, his chin hair would be omitted, but now in the manga canon, he has an undeniable goatee
Once upon a time Sir Crocodile was quite a formidable opponent for Luffy. Now,if you google search Crocodile X Donquiote Doflamingo and you'd be shocked to see Crocodile on the submissive end of the pairing.
In fact, all of the Gundam pilots have been victims of this at one time or another, and sometimes with two or more of them in the same story. If it's not Duo, it's usually Quatre. Sometimes, it's all of them at once. Gundam Wing fanfiction can read like poorly characterized lesbian drama WITH PENISES.
Zechs can get this treatment when Treize doesn't show him enough love.
Battler Ushiromiya, in both Japanese and American fanart. Usually the result of being turned into Beatrice's furniture and getting tortured.
In Naruto, there are many irate fans that did not like how Hidan was made the designated Uke in slash fiction pairing him with Kakuzu. The argument being that just because he looks slightly less muscular (and more like... a human?) than Kakuzu doesn't suddenly make him a weepy uke.
Naruto, in large part because of his Keet appearance, is often made into a blushing uke for Sasuke, Sakura, Kakashi, Iruka, Hinata... This is in stark contrast to his canon personality; it's hard to imagine someone as bombastic and headstrong as Naruto ever acting the way he does in fanfics.
Even more puzzling are the fanfics that do this to Naruto while also promoting him to Hokage, a status that should carry with it a certain amount of dignity and respect. The strange result is a supposedly badass ruler of an entire nation of ninjas who in practice spends his days failing at his job, crying about how he's not loved enough, and being molested by his subordinates. One has to wonder if his people are okay with having a leader like that...
Gaara is often hit with this as well even though his abilities are no laughing matter, not to mention that being the fifth Kazekage, this causes the same problem mentioned in regards to Naruto, above.
Neji has been turned into a weepy blushing uke for Shikamaru and others many times. And Kiba, maybe the most Hot-Blooded character in the series, getting the same treatment with numerous partners.
Umino Iruka might as well be named Uke Iruka. When paired with anyone, but especially Kakashi, he is ridiculously ukefied to the point that he's less Naruto's big brother figure and more like a Distressed Dude for badass Kakashi to save from the cruel shinobi world. Granted, we haven't actually seen enough of Iruka's personality to entirely call this characterization bullcrap, but stats released would at least support that he's stronger than most of the special jounin out there, despite being a chunin. Give the guy some credit, he's a ninja, he's not helpless. Even if he's less powerful than other shinobi, he still took a huge shuriken to protect Naruto without hesitation, and also questioned Kakashi and others openly for Naruto's sake.
Deidara. Sure, he's got long blonde hair and is Sasori's partner, but he's not the caricature of a woman, yet the way he carries on in some fanfics you'd think he was about to give birth. This also happens to Itachi and Sasori sometimes.
Sasuke usually gets hit with this in fanfic as well, going from a vengeful loner to a wimpy uke for Naruto, Itachi, Gaara, Kakashi, etc.
Done occasionally with Sousuke from Full Metal Panic! — most prevalently in certain slash fanfiction. Granted, his being an UkewasCanon and pretty much confirmed by Shouji Gatou (Sousuke's status as a "receiver" if he were to be in a homosexual relationship was outright stated in one of the side stories that Gatou wrote). However, some fanfiction takes this Up to Eleven, where Sousuke becomes much more emotional and... PMS-y (very unlike The Stoic he is)— to the point where he actually seems to be depicted as a male version of Kaname.
Frieza is usually also stripped of his smug, arrogant personality and becomes more of a boyfriend to Cell, most likely becoming pregnant sometime in the process.
YuYu Hakusho slash likes to do this to Hiei. Nevermind that it's not only severely out of character for him, but that Kurama, his most common partner, is a far more obvious subject for it. It must be his height.
Kurama gets his fair share of this, often involving Karasu and/or Yomi.
In Hunter × Hunter, Kurapika is most often the target of this trope. 99% of the doujinshi found is pre-timeskip and completely ignores Kurapika's Character Development and thus making him perpetually the motherly uke type to Leorio. In fanfiction, however, they give more attention to his development, but making him seduced/kidnapped by his mortal enemy, Kuroro, and in most of them he ends up joining the Spiders. This being when they don't turn him into a woman.
Also tends to hit Gon, whoever he's paired with. Also affects Hisoka, bizarrely, in fics where he acts a lot, well, gentler than he could reasonably be expected to act, even if he's the Seme.
Germania gets wimpified just because he happens to look a bit like Legolas and because he had to fight off the Roman Empire.
Italy isn't exactly a paragon of masculinity, especially when compared to Germany, and according to some of his conversations with Germany and Japan, he's still a virgin who has yet to reach third base. But considering that Germany, in spite of being One Head Taller and more muscular than Italy, has been shown to be so clueless about romance and sex that he had to consult a guidebook to figure out how to court Italy, their relationship is actually less stereotypical (and more Adorkable) than the plain lazy "uber-knowledgeable seme Germany has to teach uber-naive uke Italy how to have sex" depiction seen in some Germany/Italy fanworks would have you believe.
England often goes from the snarky, yet also sensitive Tsundere he is in canon, to becoming a weepy, emotionally-needy mess who pines endlessly for [insert: America, France, Canada, etc]. and is more than once the target of [insert: Russia, France]'s violations/torture/etc. so [insert: America, France, Canada, etc]. can literally pull a Big Damn Heroes to save him and let the Hurt/Comfort start. Either that, or America is a Bastard Boyfriend to him and England becomes a weepy mix of Purity Stu and Love Martyr, while the artist expects everyone to believe that theirs is as completely healthy and cute relationship. When it comes to sex, England is also often made a virgin and awkward or even oblivious about sex, when in canon he's so much of a pervert that it puts France to shame. Also, some fanartists tend to draw him with extremely feminine hips...
America himself gets this treatment more often than you'd probably expect, with a number of fics conveniently forgetting that he's capable of effortlessly swinging a full-grown buffalo around (and that was when he was just a child, mind you) so that he can be tortured by England or Russia (or, in one notorious series of fics, gangbanged by the entire cast) without being able to lift a single finger against them. Maybe some certain fans just find the idea of the strong, self-assured "hero" becoming The Woobie fetishy. Or maybe it's a case of Misplaced Nationalism demanding revenge upon Eagleland— for instance, in the wake of the Global Financial Crisis, the HetaliaKink Meme suddenly became filled with "Financial Crisis Gang Bang" fics, which were Exactly What It Says on the Tin. Artistic License - Economicsbarely describes these works.
The fact that canon does establish him as sexually inexperienced compared to Greece, who happens to be One Head Taller than him, doesn't help. The better Greece/Japan fanwriters recognize that, sexual disparities aside, the two actually have a pretty equal relationship in canon with Japan actually being technicallyolder than Greece (if you consider that Greece represents only the Hellenic Republic due to his mother literally being Ancient Greece), and that even if Japan's Moe traits tend to be enhanced when he's with Greece, he'd still have a touch of Inscrutable Oriental or at least a 'far more likely to quietly hide his emotions than become a blushy, weepy mess over them' vibe to him; the poorer fanwriters...don't.
While Canada is quite the sweetheart (unless you TRULY piss him off), some fangirls take his canon bad luck, soft-spoken behavior and Woobieness to make him a stereotypical uke in more than one France/Canada, Prussia/Canada, America/Canada and/or Cuba/Canada fic. Fanart that pairs Canada with a more 'assertive' male typically makes Canada shorter than the other male, even when this actually wouldn't be true due to his official height being the same as America's (which means that he'd be just as tall as his brother and taller than France or England).
Poland frequently, provided Lithuania isn't ukefied instead. Apparently, if someone has cross-dresssed ever, at all, under any circumstances, they will never be able to do anything except be a super-girly little uke for other guys.
However, a lot of fanworks Take a Third Option and make Lithuania a meek, submissive top to Poland. (And sometimes Russia, which a famous doujin circle liked to do.)
China is very cute and feminine-looking in some canon illustrations/strips, but it still doesn't justify the massive ukefication he gets in fanwork. Particularly Russia/China and Japan/China ones (though the fanbase for this one seems to be leaning towards seme! China these days). And we are talking about the same China who fought and defeated Germany and Japan with only a ladle and wok. Not to mention, he beat off a dragon with a Hello Kitty doll. That's impressive. Apparently, long hair means that you're doomed for eternal bottoming.
Hong Kong sometimes is hit with the ukefication paddle as well, more often when his seme is either England (and double if Hong Kong is still his colony), Japan, or South Korea. Fortunately for him, in the case of Macau this isn't as frequent; even when he more often than not ends up bottoming, HK will most likely keep his spine.
In regards to the other Asians, Korea tends to top his "partners" but sometimes becomes a victim of this if he's paired up with America, and occasionally with HK. Thailand is lucky enough to dodge this treatment unless he is the love interest of Imperial Japan, and Macau is almost exclusively paired with Hong Kong so he tends to be the top one instead. Though in the case of Korea and Thailand, it's a bit weird considering that both of them are pretty tall (Korea is about 179 cm, or at least tall enough to be at eye-to-eye level with America, and Thailand is just a little shorter so he should be at least 177-178 cm).
And there's Finland, too. While his partner and most fan-popular Love InterestSwedenis quite taller than him, it doesn't explain why doujinshi and fanwork twist Finland into a little weepy Keet who may look even younger than Sealand, when Finland's character profile states that he has the look and the attitude of a 20 year old, while Sweden is 21. The way they're drawn in some doujinshis, you'd think they're something closer to 12 and 26, respectively. Yes, the pair invoke so many Boys Love Tropes as is that it's that much easier for fans to flanderize Finland's uke role along those lines. That's still not an excuse, as the charm of the pairing is seeing a huge guy like Sweden fitting the House Husband archetype far more than the slightly waifish Finland.
Ironically, Sweden is hit by the trope more than once as well. While he's still the tallest of the Nordics, one wonders how come Yandere!Denmark can rape and beat him as easily as he often does in doujinshii and fanart: if they're about the past dealings and wars of both nations, Sweden will get whipped/tortured/raped/etc. by Denmark, running away with Finland to "escape" from his torturer/rapist (and sometimes wangsting about that).
Iceland sometimes gets hit with this as well, specially in regards to him and Turkey. While he is younger than the standard nation, this doesn't mean he's a pre-pubescent boy (he's mentioned to look at least 17), and while Turkey is depicted as being quite older than he is, it doesn't necessarily mean Iceland would submit to him completely. (Curiously, even with this factor, Turkey/Iceland ends up one of the few Turkey pairings in which he's not depicted as a Bastard Boyfriend.)
Greece actually isn't hit as hard by this trope in Turkey/Greece works as he could have been, as many of them depict him as a Tsundere capable of standing up and talking back to Turkey as an integral part of their Belligerent Sexual Tension. Nonetheless, just as many of them can leave you wondering why Greece acts like he's PMSing all the time or why he never seems to be able to hinder Turkey from belittling/abusing/raping him in spite of all his defiant words.
On the other hand, Germany is often placed in a similar situation when he's paired up with his older brotherPrussia instead of Italy. Yeah, as mentioned above the guy looks ultra-super manly yet is really clueless about romance but that doesn't mean that he will become a super ultra submissive and mushy mess as soon as he and Prussia are romantically/sexually involved either. Germany may be clueless about romance, but not in regards to the mechanics of sex.
Bizarrely, Germany also tends to receive this when paired with England, of all characters.
Prussia is subjected to this treatment as well when paired with Germany or Russia (the latter tending towards Stockholm Syndrome more often than not).
And on the other other hand, Italy's brother Romano is portrayed as a bitchy and whiny uke caricature who still gets sexed up by "Boss Spain" whether he wants it or not. That is, unless Spain is the one subjected to this and Romano becomes aDomestic Abuser instead.
On that note, Austria is a victim of this. A lot. He's skinny, too uptight about the aristocrat act, spends a little too much time on the piano, and doesn't really have a hardcore history of fighting to back him up. This somehow completely overshadows his nation's history as a great power run by very shrewd diplomats. Sure, most of his land and power came through arranging marriage, but he still had it. Yet he gets slammed with a sudden case of ukeism when paired with nations more action-oriented like Hungary or Prussia.
Even Russia can get this. Now, it's way more common for him to get the complete opposite; he is constantly derailed into a rapist or if not, a snarky, smug and experienced seme with no childlike traits. Then there's a few fans who exaggerate his manchild traits instead, making him clueless about sex and weepy, emotional and screaming. One of Russia's key traits in canon is that he almost always keeps a calm smile, even when in extreme pain (such as, you know, his heart falling out or stopping a tank with his body). And while he is childish and not much of a sexual type, he knows enough to play immature sexual boasting contests with America.
Though still not extremely common, some Russia/China fanworks make Russia act practically infantile to play up China's parental traits.
Hilariously, Turkey gets hit hard with this in much of the erotic fan art and doujin of him. Though it's all just for porn purposes and usually very tongue-in-cheek. That's bara for you.
Certain fans like to paint Hungary as a submissive Faux Action Girl unable to actually stand up for herself without a real man to rule her. Never mind that she happens to be both feminine and one of the manlier characters in the series, shown as capable of beating Prussia by herself or that other fans like to show her as being "on top" when paired with Austria.
Oh, Yugi. How are you ukefied? Too many ways to name. In canon, he started out as a loser who was picked on a lot but still had enough backbone to stand up when people he considers friends are being attacked and over time grew more confident thanks to his darkerPharaohfriend. Also probably a master strategist able to rival Napoleon and Lee (if you take into account that all he does is play strategy games). But if you read fanfiction, he's a spineless little wimp who's always being raped or abused by everyone near him until "Yami" comes along and saves him. Or Yami kidnaps him and does the raping, torturing and abusing himself until Yugi falls in love with him and then he turns good and Yugi defends his actions to others saying that Yami's "misunderstood". Or when the Pharaoh leaves, Yugi becomes so emotionally unbalanced that he kills himself despite saying in the manga and anime that he didn't need him anymore. That unfortunately sums up pretty much 99.9% of Yu-Gi-Oh! fanfiction, 99.99% if you substitute Ryou Bakura and the Spirit of the Ring for Yugi and the Pharaoh.
Bakura gets this the worst in fanfiction. Granted, he was continually emotionally abused and manipulated by the Spirit of the Ring in canon, but there was no indication that he was ever physically abused (which makes sense when you consider that, contrary to what 90% of fanfics would have you believe, the Spirit doesn't have a physical form outside of Bakura's body and wouldn't be very likely to harm the one body he can inhabit) and he was able to stand up to the Spirit on several occasions when his friends' lives were on the line, two things that fans completely ignore in favor of turning him into a frail, weepy guy who exists only to be horribly abused by "Yami Bakura" and possibly redeem him with the power of twu wuv.
The assumption of physical abuse probably stems from the fact that the spirit isn't exactly careful with Bakura's body (stabs him with the spikes of his ring, stabs his hand on a tower, stabs himself with a knife...) However, once Bakura's life actually was in danger (at the end of his duel against Yugi), he gave up victory and promised to protect him because he needed the body. In addition, while he was quite careless, he never really "punished" Bakura, or hurt him out of pure sadism, as fanfiction would like to make you believe. And given that Bakura got over it quite quickly and didn't turn into a shaking mess at the end of the series, it can be assumed that most of the time, he was rather "asleep in his subconscious", instead of being forced to witness the spirit's deeds. Also, his other character traits (that weird Deck full of all the creepy demons and Ouija boards? The Spirit didn't have a thing to do with that; that's his regular Deck) get dialed down to nothing.
Jonouchi, who in most fanfics is a defenseless "puppy" whom the mighty Seto Kaiba has to rescue from the clutches of his evil abusive father.
Marik, the resident Dark-Skinned Blonde, is one of the fandom's greatest ukes and lends himself well to an angsty rape-y story involving either his father or his own dark side. Said dark side also regularly gets turned up from Split Personality to Superpowered Evil Side, to facilitate the removal of all his character traits besides being a quivering bottom. The actual Marik was a brutal crimelord who had no problem with ordering attempted murder if it meant accomplishing his goals, and only turned over a new leaf when he learned who was really responsible for his father's death.
Yu-Gi-Oh! GX: Almost any male character could be given as an example, but it's seen most frequently in the case of Juudai, the guy who saved the world four times over before he's graduated high school. In fanfic, if he can walk and chew bubblegum at the same time it's amazing, much less survive a dangerous situation without Johan or Manjoume or whoever the seme of the fanfic is around.
Yu-Gi-Oh! 5Ds has Yusei. While the above two were at least submissive or had Keet traits, Yusei is, straight-up, one of the most intelligent, mature, stoic, and strong-willed characters of the series. In the average fanfic, he is instead living for the love of Jack Atlas or Crow.
Especially noticeable in doujinshi, where he's typically shown wangsting about things that he hardly even angsts about in-series. Which results in him needing comfort sex from Lavi or Kanda. And if that doesn't happen, he'll normally be shown being rendered into an emotional wreck that's subsequently raped by Tyki. And then having comfort sex with someone.
Kira and Yumichika, two snarky long-term professional army officers, are almost always written as helpless damsels-in-distress who literally could not raise a hand to save themselves, let alone use any kind of weapon.
Jushiro Ukitake has been portrayed as this, due to his Ill Boy status and his close relationship with Kyouraku.
Tesla evokes this trope when paired with Nnoitra to a point that's almost painful to even think about. Granted, he already clings to the Espada like a drowning man clings to a piece of driftwood, but he's still a decent fighter and fairly self-confident in canon, and the way he's written and drawn in some fan works you'd think... well...
Ciel of Black Butler. Way too many people make him seem very uke, most likely due to his age and the fact that he is often paired with his demon Battle Butler Sebastian. When you look at Ciel's actual personality traits, it's very clear while he has a small amount of inexperience/naïveté, he'd never be the blushy/weepy/submissive uke he's often portrayed as in fan works.
Kaito / Kaitou Kid, Shinichi's Worthy Opponent who is the most popular person to slash with him, gets this too sometimes, though usually in stories where he's slashed with his other detective rival Hakuba Saguru. At least he gets to be a Tsundere with Hakuba most of the time though (Unless the writer is Flanderizing Hakuba's obsession with Kaitou Kid to Stalker with a Crush levels anyway). On the rare occasion Kaito is uke to Shinichi instead of the other way around they remove the Jerk with a Heart of GoldDeadpan Snarker traits and make him a straight up Keet/Moe Blob, sometimes taking advantage of his apparent preference for disguising himself as women to make him into a Wholesome Crossdresser to boot (Okay, so it is almost canon and it does happen when he's Seme too, and even sometimes when he's straight, where it's Played for Laughs, but it's worse when he's being Ukefied).
Name any male character in Tengen Toppa Gurren Lagann, they'll probably have received this treatment. Ironically enough, the top two targets for Ukefication seem to be Hot-Blooded badasses Kamina and Kittan, the latter most often being portrayed as this complete teary-eyed moeblob.
This has a disturbing tendency to happen to Chrono from Chrono Crusade, even in Het fic. In a lot of the fics that use the more extreme forms of this trope, Chrono ends up being a rape victim at the hands of Aion, Joshua and even FatherRemington, or at least involved in scenes with dubious consent.
Masaomi from Durarara!! is hit by this trope the most especially when paired with Izaya or Mikado when he's the boss. Izaya and Mikado get hit with this a lot more than one would expect with Izaya becoming a weepy, crying uke to Shizuo in most Shizaya fics and Mikado being turned into a super innocent moeblob to be ravished by any one of the male cast. The problem here is that in canon, Izaya is Izaya and Mikado is not the nice guy everyone sees him as.
Death the Kid from Soul Eater. A majority of fanfics featuring him has him yearning or being the bottom.
Code Geass: Despite having the personality traits of a seme (and being taller than Suzaku), Lelouch is almost always ukefied because he positively sucks at physical education, especially compared to Suzaku. And he looks pretty in a dress. People seem to forget that Lelouch hates dressing up like a girl and his upper body strength isn't bad: lugging around Nunnally up the Kururugi Shrine's stairs without any help and holding onto Shirley while they're both dangling off a building is very impressive. Admittedly, Suzaku was holding onto Lelouch's weight with the latter but still.
Saint Seiya has a massive non-English speaking fanbase and this happens a lot, particularly with some of the prettier men-Shun, often, Hyoga and Shaka are the most glaring examples (Camus and Mu too). Considering how Badass these guys are in the series, and that some of them really have NO feminine qualities at all, it's extremely jarring to have Shaka killing Spectres in cold blood one minute and moaning like a whore under Aiolia the next. That being said, there are plenty of fanworks out there that avert this and write the characters extremely well.
Shion in No6 when paired with Nezumi. In canon he's a sweet BishōnenNice Guy who's shown to be able to protect himself when needed and he also has a lot of Ho Yay with the more taller and aggressive Nezumi. In fanworks he sometimes undergoes this.
Zeref, the alleged Ultimate Evil of Fairy Tail, tends to undergo this when paired with men (and sometimes when he's not paired with anyone.) The reason being that his first significant appearance gave him a Cry Cute moment, something in stark contrast with the Voldemort-esque treatment the characters all gave him up until that point. Basically, even though he wasn't all that uke like in that scene (he nearly killed three people without even trying) he fell far enough from expectations that people saw him that way anyways. Even his acting much calmer, cooler, and deliberately murderous later on hasn't stopped fan art of Natsu comforting him, or him being the victim of Mr Seahorse.
Many Fruits Basket fanfics that feature YukiandKyo. Most will wimpify Yuki, the stronger of the two, though some will wimpify Kyo.
When paired with a male character, Hatori will almost always get the Mr Seahorse treatment (because he can actually turn into one) note Because his zodiac animal is the dragon, but the Zodiac Curse has changed over many generations, this is seen as a sign of the curse being weakened in addition to the regular wimpification.
The infamous JoJo's Bizarre Adventure doujinshi made by CLAMP (and by extension, Wish) does this to Kakyoin. While a pretty mild case compared to most of the other examples on this article due to being parody, it's still pretty cringe-inducing for many JoJo fans to see such a badass and strong-willed character acting so Out of Character, to the point of being referred to as Jotaro's "wife" and even getting hit with an implied case of Mr. Seahorse.
That doujin's no exception either; Kakyoin gets this a lot in fandom when paired with Jotaro because he's the shorter and prettier of the two.
Good luck finding a Fullmetal Alchemist fanfic featuring Roy/Ed that doesn't do this (to at least some degree) to one or both of them.
Giroro from Sgt. Frog get's hit by this trope a lot, with almost 90% of doujinshis featuring him getting raped/tortured by Kululu, Vipers, his brother, etc.
Jadeite from Sailor Moon usually gets hit with this hard when paired with Nephrite in fanfics or doujinshi. (Or with Queen Beryl, but that isn't quite so Out of Character considering how submissive he was to her in canon.)
Although every one of the X-Men has had this happen to them at some point or other, losing all identity in the face of the sheer, unmitigated studliness of Wolverine, probably the worst victim is Gambit. 60-70% of all X-Men slash is Logan/Remy, painting the latter as submissive, cringing, or all-around pathetic. While he canonically has moments of Angst, the slash fanbase enjoys cranking that Up to Eleven in fiction. And it's not limited to slash.
Nightcrawler, for reasons as obvious as Legolas from LOTR, tends to fall victim of this in fan fiction. Lets not forget that Kurt has been shown that he's capable of being a badass but in the land of fan fiction, especially when shipped with Wolverine, he plays the role of a damsel in distress who had to depend on Logan to get him out of a jam.
Cyclops too, especially when paired with Wolverine but it is also a big theme in the growing number of fanworks that pair him with Captain America. Although to the writers' credit they do mix it up with him; they tend to expand on the traits he shows in canon (read: Ambiguous Disorder) to try to make him seem more innocent, especially in the realm of sex, which normally takes the form of him not understanding that provoking the homophobic mutant haters by flirting is a bad idea. This stops making sense when in the narrative of the story he is outright mentioned as having slept with other men.
It's pretty easy to tell which side a Steve/Tony slashfic falls on by figuring out whether the fic's implication is a) Tony briefly dropping his canon control-freak persona is a huge, jaw-dropping deal that shows how special Steve is to him, or the fic's implication is that b) Tony must have a natural Uke-ish personality all the time (inexplicably hand-waving his canon control freak tendencies). Choice b) obviously requires a lot of canon warping.
The opposite also happens, (mostly in the movie fandom) with Steve being portrayed as a shy, sexually inexperienced boy scout who needs Tony to teach him how to 'fondue'.
To be fair, for movie continuity at least the "virginal" portion of that is probably true ...
In Bruce Wayne/Dick Grayson fics, Dick gets hit by this trope fairly frequently. This phenomena is unique in that it manages to be both a pretty justified-by-canon characterization and full-fledged Fridge Horror at the same time. You see, Dick did have this sort of personality and this sort of emotional dynamic with Bruce. In fact, he's had it for most of his existence (since 1940!). The problem? The period in his lifetime where Dick had this sort of dynamic with Bruce was when he was Robin, i.e. underage. Cue Squick.
Just about every single male member of the Bat-Family has fallen victim of this. Even Red Hood.
Fan Fic based on Film
Happens to Kirk, though it's not unexpected. Chekov gets this constantly, no matter who he's shipped with.
In District 9Slash Fic (what little there is), Wikus is generally turned from a mentally unstable and violent Half-Human Hybrid to a scared little kitten who quickly abandons his smoking-hot wife for a seven foot tall grasshopper, and may or may not mother its children.
Sometimes in The Dark Knight Saga fanfiction, Jonathan Crane/Scarecrow—who is most pleased while torturing mental patients or verbally stomping everyone else in the room—becomes weirdly effeminate. And wimpy. And willing to lick dirt off his partner's shoes. Huge insult to him and to women. Really, just because the guy's scrawny doesn't mean he's not a power-hungry, self-respecting villain. Probably has to do with Batman pulling his hair in Batman Begins. Fic writers liked the imagery so much, they decided that Scarecrow liked it too. Well, that and the fact that Cillian Murphy is a very good-looking person.
Fans of The A-Team seem to forget that the members of the titular team are all highly trained Army Rangers, especially when there’s a change for some hurt/comfort in a story. Face and Murdock are usually the ones who suffer the worst of this. Both Face and Murdock have canon backgrounds that render them especially vulnerable to this trope. Face is almost always portrayed in these situations as a young soldier in order to avoid accusations of being Out of Character, while Murdock is often seen at the mercy of his unspecified mental illness, and some iterations of this are actually accepted as Fanon. However, some highly dedicated fanfic writers have even been witnessed making Hannibal their preferred target for Wimpification.
Similar to his comic book counterpart, after Captain America: The First Avenger premiered, it's become fairly common nowadays in Marvel movie fics to depict Steve Rogers—who in movie canon tells bullies to shut up in theaters, talks back to Nazi super soldiers like Red Skull, risks a court martial to do the right thing, and leads the Howling Commandos in WWII—as some kind of adorable, harmless, overgrown puppy who's ripe for the picking by either Tony Stark/Iron Man, Howard Stark, Black Widow, Darcy from Thor, Thor himself, Loki, Bucky (!)—hell, practically every Marvel movie character.
Loki and Tony Stark also have a lot of instances. Aside from Stony, Steve isn't even paired up all that much with people. But you have Chitauri/Loki, The Other/Loki, Bruce/Tony, etc.
Loki really gets this to the point of total absurdity. Far from being the superhumanly strong and robust life-long warrior he is supposed to be, he's written as fragile and passive. Hand-in-hand is the extreme physical modification: Loki is constantly described and illustrated as tiny and dainty in spite of the filmverse character utterly towering over every Avenger but Thor and Hulk.
The eponymous Sherlock Holmes from the 2009 film gets this all the time. For everyone. Men, women, villains, heroes, Watson, alternate versions of himself and Watson, mice...
And Remus Lupin/Sirius Black and occasionally Harry/Ron.
Both Harry and Draco in My Immortal, despite not even being slash.
Also, anything Harry/Snape-related will have Harry end up being ukefied. Unless it's Deserving, where both get ukefied but Snape gets the worse of it.
Snape/Sirius fics sometimes involve Snape being ukefied due to Sirius' canon history of bullying Snape as a teen. Some fics even take this into Bastard Boyfriend and Domestic Abuse proportions.
In Snape/Lupin fanfictions Lupin tends to get this, apparently because in the Prisoner of Azkaban he acted friendly towards Snape, this however is no excuse for the amount of abuse he allows Snape to put him through in fics.
Wicked Lovely: Quite a bit of Irial/Niall does this with Niall. And Seth gets this with pretty much everyone, even more than Niall. He might be pretty quiet and stuff in canon, but he most likely could stand up for himself if he needed to. Fanfic... disagrees.
Despite the fact that Legolas is a badass archer who can rival Gimli in terms of badassery, he finds himself the damsel in distress in fics that involve him and Aragorn.
Applies to many, many elves, most disturbingly seen with Glorfindel.
Aragorn too, especially if Sauron or Legolas is on top.
Frodo, all the time. With anyone.
While Elphaba is still the Seme in most fics, she's often considerably more sensitive and emotional than in even the musical.
In A Song of Ice and Fire, one of Jon Snow's subordinates is a handsome young man known as Satin, who was previously a prostitute, having been pimped out by his mother as a boy. Fan perception is that Satin is a Camp GayPretty Boy who is always swooning over Jon. However, in-text, there's no indication of Satin's sexual preference (a different issue than the gender(s) he was forced to sleep with), and while Satin certainly likes and respects Jon (as a Heroic Bastard, Jon defends fellow "outcasts"), there is not much evidence of this being anything but platonic.
Fan Fic based on Live Action TV
Spock often ends up being the uke in Star TrekSlash Fic. There's a reason for that (well, it's good enough for fangirls, anyway) — in "Amok Time", Spock complains that he didn't think pon farr would apply to him as a half-Vulcan. This implies he hasn't experienced it before, which, in turn, implies he is a virgin. However, Kirk is far more frequently ukefied than Spock, especially in pon farr fics, where Spock is usually shown going into a feral predatory mating frenzy. Apparently, this somehow affects Kirk's personality too.
Power Rangers has a fan series called The Zedd Chronicles in which Tommy Oliver (yes, that Tommy Oliver) gets a bit of this. He's mainly very sensible, but you can easily see how he's the 'woman' in the relationship.
Very popular with Jack/Ianto authors in the Torchwood fandom, despite the fact that in canon Ianto gets more and more badass as the show goes on. That is, until his sister questions him about his relationship with Jack in Children of Earth.
Castiel warrants special mention. To wit: fandom likes to portray a Castiel that cries at the drop of a hat, is slightly more vulnerable — emotionally and physically — than a thirteen year old girl, and is prone to descriptions more befitting of a puppy or kitten. Mind you, this is the same angel who, in the actual show, barely changes his facial expressions, takes stabbings, beatings, and explosions without batting an eye, and beats up his angelic brothers — and the occasional Winchester — with some regularity.
Happens to the Doctor (especially the Tenth) of Doctor Who far too often. Okay, so he often seems to be a Chaste Hero, but he's also, in general, emotionally stunted and repressed (see: his definition of "all right" in "Forest of the Dead") andMinored in Asskicking. Ukefication is generally brought on by the Master, Jack Harkness, or Donna Noble. The Ninth Doctor tends to get the reverse of this in het fics: there's a highly visible element of Nine/Rose shippers who write him as ludicrously sexually dominant, sometimes to the point of being a Bastard Boyfriend, despite the lack of any canon hint of it.
If you think Glee fandom can't Ukeify Kurt Hummel, you haven't ventured into enough Puck/Kurt fics. While a good portion is actually good — keeping Kurt snarky, bitchy, and confident even while showing his soft and/or hurt side — a roughly equal percentage turn him into a weepy, whiny, clingy thing with less self-esteem than a mosquito bite and absolutely no spine.
In the majority of Big Time Rush fics, Logan is frantic, uptight and skeptic with goodreason, but typically he's portrayed as a whiny wimp who reluctantly gives in (sometimes very reluctantly). The others are susceptible to this as well. There's a sorting algorithm of dominance which almost directly correlates to height; Kendall tops James tops Carlos tops Logan (results may vary). Kendall can even retain some of his natural seme qualities while biting pillows.
Merlin. Far too many authors seem to forget that he is actually a man and a pretty badass one at that. Which is doubly odd when you remember that, in this show, his Heterosexual Life Partner Arthur is the one who always needs rescuing and winds up in chains a lot.
Dr. Spencer Reid of Criminal Minds is practically the perfect uke—with rare exceptions, whenever he is paired in a slash ship, Reid is always on the bottom, even when he is sexually confident. It doesn't help that his actor, Matthew Gray Gubler really does look kind of feminine, and that Reid already checks off most of Uke qualities. All fan fic writers don't really need to ukificate any further other than just putting in a slash ship.
Wilson and Chase from House. Or occasionally even House himself.
Barney Stinson in How I Met Your Mother fics. In canon, he's hyper-masculine, pushy, forceful, extremely insensitive, loud-mouthed, aggressively seductive, personal-space-invading, and specializes in actively getting women into bed, not the other way around, hates losing control, and is repelled by intimacy. With Robin, the nature of his canon feelings for her might excuse an exception, but most slash involving him is with Ted, which makes his ukefication even stranger, since nearly all his Ho Yay-ish moments with Ted involve Barney as the forward, demanding, overbearing instigator (which slashers can interpret as 'seductive') while Ted is either resistant or passive. In fics, of course, Barney's often a weepy, delicate, emotional, clingy thing with virginal vibes who's so hurt by any standoffish-ness from nasty old Ted/Robin/whoever's screwing him today. Perhaps fic writers think Neil Patrick Harris is just too good-looking to be in the "man's" position.
Blake's 7 Blake/Avon slash is notorious for doing this to Avon, despite the fact that in canon he's the colder, more ruthless, less emotional and more violent one of the pair. Just because he's thinner and The Lancer to Blake's leader. Avon/Vila slash also does this to Vila, which isn't quite as implausible as with Avon, but which still seriously undervalues how courageous and pragmatic Vila can be.
Sherlock fandom is usually pretty good about characterisation, but there are still some fanworks (usually fanart or fancomic rather than fanfics) in which this trope happens, and John is usually the victim. Yes, he's not as tall and intimidating as Sherlock and looks cute and cuddly in jumpers, but he's an army veteran and can kill people in cold blood if they're not nice.
Blair in Sentinal; Canon!Blair is younger and smaller than Jim, and has long hair; he's also a scholar with no military or police training. He's also fairly well muscled, quick witted, good with improvised weapons (vending machines, toilet stall doors, basballs, firehoses) and can hold his own in a fight. Many slashwriters turn him into a girl, and a girly-girl at that.
Fan Fic based on Music
Vocaloid has no true canon, but there are some ridiculous examples of this (and even semefication) in its fanfiction.
Fan art of Pink Floyd features this fairly commonly.
Led Zeppelin fics often hit Robert Plant with this treatment.
A lot of artists get this in Japanese rock music RPS. Ukefication and Wangst are often double-teamed on anyone who is written as the second half of a pairing in a lot of said fanfiction, never mind how the person might be. Some Visual Kei artists make Uke traits part of their stage persona to encourage this.
It happens to almost any Visual Kei artist who happens to look feminine or androgynous. Pretty much the only people in Visual Kei who haven't been given stereotypical uke traits in Slash Fic are Taiji Sawada (because he was a Memetic Badass and anyone trying to make him otherwise got laughed out of the fandom) and Atsushi Sakurai of Buck Tick (because his image is Memetic Sex God and his most well known ventures into Ho Yay have him as a dominant/top) and because both of their bands' fandoms don't tend to attract the fangirls more prone to using this trope. Unfortunately, bad writers writing either of these, when they do appear, tend to make both of them rapists or the Memetic Molester of whomever gets the "uke" treatment, in a form of Black and White Insanity and Unfortunate Implications combined. The entire Taiji/Yoshiki pairing tended to be this in most posted fic before Real Life sunk the ship.
For a long time, it was quite bad to be Pete Wentz, as all of Fall Out Boy had a habit of effing you up the butt in Real Person Fic. For a relatively longer time, it was quite bad to be Patrick Stump as Pete Wentz (and sometimes the rest of Fall Out Boy, but mainly Pete) had a habit of effing you up the butt in Real Person Fic. Humourously, in what little hetfic exists featuring female musicians and the occasional non-self insert OC, Patrick gets nonwimped and shipped with a considerable amount of women including Pete's ex-wife, Ashlee Simpson.
Slash fics for The Who tend to do this with Roger Daltrey.
Fan Fic based on Video Games
Fire Emblem has this in spades, the most common victims being Eliwood, Guy, Wil, Sain and Lucius of The Blazing Sword and Marth of the Archanea series. It doesn't help Marth does display weepy uke traits in the OAVs, either.
In the Tellius verse, Soren gets this with no exception. Physically, he may look like one, but some yaoi fans tend to forget about his personality. The justification they have for it, though, isn't present unless you get an A level Support between Ike and Soren, so it's a case of Flanderization as well.
Reyson, Naesala, and Zihark also get this in varying degrees.
Poor Inigo and Brady are doomed when they're paired with Gerome and Owain. Whether Laurent gets hit with this or not whenever paired up with Gerome, it depends heavily on the work.
When a male Avatar is paired with Chrom, he falls victim to this as well... which mirrors the Chickification that his female counterpart often goes through when she is paired with Chrom. It really doesn't help how you can customize the guy's looks to make him a borderline Cute Shotaro Boy if the player wants to.
Chrom, too. Oddly, this shows up more in Chrom x female Avatar fanworks... The kind, stubborn and brave Prince of Ylisse? He's only seen getting either super romantic or super melodramatic with his more often than not perfectly chickified Avatar ~waifu~.
In a rare non-romantic example, a Female Avatar's son Morgan is also subjected to this via being reduced solely to his close relationship with his mother. Apparently, the boy's only real personality trait is his thoughts on the mother he adores and idolizes; therefore, rabid Female Avatar fans kinda "shape" him into some sort of bland "accessory" for his mother without any personality of his own.
The Sengoku Basara fandom does this with frightening frequency to both Sanada Yukimura and Mori Motonari. In the anime series, Yukimura regularly survives discipline from his mentor that creates new land formations, sets people on fire with his fists, fought Honda Tadakatsu to a standstill, and deals with a young lady being preyed on by Eldritch Abominations in a polite but very emphatic way. Most doujinshi and fanfic has him whimpering and crying while Date Masamune takes his innocence. As for Motonari...the lesssaidabout his disposition, the better. Anybody attempting to top this guy would do well to watch out for a razor hoop in the ribs, if not a strategically-placed bear trap.
Yukimura is a curious case, as people often have him crying and whimpering when it's him taking Masamune's innocence (or what remained of it anyway), or at least until they get around to doing the nasty. It's probably the effect of his youthful naivete combined with an emotional and open personality.
Also Ishida Mitsunari, an extremely disturbed and violent man with a frightening temper that snaps at any given opportunity; the fans make a point of playing him as a Troubled, but CuteTsundere in desperate need of a good lay from his nemesis Ieyasu (whose death is Mitsunari's sole desire), to put him in his place and turn him into a blushing, fluffy kitten.
Pretty much every yaoi fic ever written involving Final Fantasy VII does this to either Cloud or Vincent. Yaoi writers seem to love taking the Iron out of Iron Woobie.
Pairing a character with Sephiroth is pretty much a guarantee that the character will be Ukefied out the wazoo. In less frequent Sephiroth/female character pairings, she is usually reduced to a weepy, ineffectualDistressed Damsel regardless of any canon badassery on her part. One exception is when Sephiroth is paired with Genesis. Then it's usually Sephiroth who undergoes the Ukefication.
Sora and Roxas, in Kingdom Hearts end up on the wrong side of this trope when they're paried up with Riku and Axel, respectively. Naga Eyes is a particularly infamous case.
Several of the Organization XIII members get this too. Here's a list of the worst examples;
Demyx and Zexion seem to be the biggest targets. they both get paired with all the other members, and almost always end up as the ukes. Zexion seems to be the bigger victim of this, seeing as how when he gets paired with Demyx he usually gets portrayed as the uke.
Marluxia is an unusual example of this, most Fan Fic that he's in portrays him as Camp Gay, even if it isn't Slash. It seems to be because of his pink hair and control over flowers.
Even Saix isn't immune! While most slash fics about him have him as the Seme, when he gets paired with Xemnas he becomes little more than a pet. [[spoiler: Thanks to the discovery that both of them are possessed by Master Xehanort, the idea of any kind of sexual relationship between them becomes very creepy, regardless of whose on top.
Commented on, with other fanfic tropes, in Those Lacking Spines. There is an Ukenator 3000, and ukefication is mentioned by name. Quoteth Vexen as if it was a biological disease:
This state wipes the personality and demeanor of a victim completely clean, replacing it with one of complete and utter submission. This causes the victim to become weak, fluffy, emotional and utterly incapable of standing up for themselves, wanting only to be in contact with others to further spread the epidemic. It is quite frankly disgusting.
In a fair number of Cleon fics, Cloud tends to be written as the more vulnerable, gentle, ukeriffic partner, despite the fact that in the actual games, he's kind of a grim hardass; if anything, Leon has shown more emotion (occasional smiles, one or two open displays of worry, heartfelt proclamations of friendship that get mocked by the main character in a later game) in canon than him.
Solid Snake gets it a lot too, but since this is mostly a backlash against the idea above it's usually handled with a little more style with him — used more for Woobie appeal than Unfortunate Implications. Not always, though.
In Tales of Symphonia fandom, this seems to have become the standard portrayal for Yuan, particularly when paired with Kratos. Never mind that Kratos is canonically submissive to the Big Bad for most of the game — his outfit during that time is even modeled off Japanese bondage gear or that Yuan is a defiantManipulative Bastard with what looks like they might be control issues: Yuan is prettier, so he gets to be uke.
In many Tales of Vesperia yaoi fics, Yuri, who literally has 14 Badass tropes applied to him, has a tendency to get this treatment, especially if paired with Raven or Flynn. Then again, this could be partially due to his appearance, which is even lampshaded in-game.
In the fandom in general, the Hot-Blooded, baseball bat-wielding Scout also has a tendency to be Ukefied (which mostly has to do with the fact that he's small, skinny, and is the youngest member of the team). Sniper and Spy's bitter, bilious, urine-soaked rivalry is assumed to be a product of Belligerent Sexual Tension.
Unless he is paired with Desmond Miles from Assassin's Creed, where "Desu" gets the treatment while Alex becomes a violently jealous Tsundere no truer to canon than his uke version. Don't expect the female characters or indeed, anything at all from either series to get referred to, even obliquely, if they get in the way of the sex. That includes Alex's body being composed top to toe of an insanely deadly disease.
When it comes to shipping Sonic and Shadow, Sonic is almost always the uke despite the character emphasis on his love for freedom. Compare straight examples from Sonic Remix to deconstructive example He Is My Master.
While the World of Warcraft fandom is far from being free of this — usually with some poor bloodelf as the victim — the bickering ex-cops Asric and Jadaar seem to dodge the bullet quite neatly. (Then again, this may be due to their personalities: Jadaar—who's a huge, hulking draenei—is usually presumed, by virtue of being the (literally) blue oni, to be the more vulnerable of the two.)
In fact, most Bishōnen characters - particularly Steven, Wallace, Morty, Falkner, and Volkner, but also others - are given the uke treatment quite frequently. The first two get it due to the popularity of shipping, and Morty gets it due to his friendship with Eusine being interpreted as more than just friends.
Sabrina has gotten hit hard with this. While she isn't the antagonist adaptations tend to put her as, she's not quite a sobbing, blushing uke like fanart often has her as.
Silver tends to get this in spades recently in fanworks that pair him with Lance.
Professor Sycamore is becoming a target for this when he's paired with Lysandre. Calem has been getting ukefied when paired with either Sycamore or Lysandre due to his Bishōnen looks.
Despite the Improbably Female Cast, Touhou fandom is swimming in this trope, numerous Badass Adorables inflicted with anything from immobilising stuttering to complete submission and helplessness when faced with the character with whom the writer has decided to pair them. Turning Remilia (an ancient terror of the night with a habit of eating people) into a child with a Precocious Crush, or turning Alice (an antisocial hermit that prefers her dolls over people and possesses enough snark to challenge Marisa) into either a sterotypical Tsundere or a lovesick puppy are the most common, though enough searching reveals examples for nearly every character. Night Sparrow Love is probably the most famous example, and while well-written as an independent work it's difficult to remember that Mystia and Mokou are a con-artist and a borderline-Death Seeker respectively, not the blushing, Cannot Spit It Out sufferers that are depicted.
Garrus Vakarian and Thane Krios of Mass Effect are often subjected to this in a semi-rare het invocation of this trope whenever they're paired with a Female Shepard. But due to Fan-Preferred Couple status, Garrus gets it worse than Thane does.
Kaidan often gets uke'd in fics with a Male Shepard. Despite the fact that he's a veteran Marine and one of the more badass biotics in the Alliance, writers will focus on his childhood issues and use his recurring migraines as an excuse for Hurt/Comfort Fic. That said, there's still no shortage of fics that wimpify Shepard himself. The majority take place after the Destroy ending naturally, but there are some that take place before.
Luigi. Yes, that Luigi. His canon personality may be soft and gentle and he may be a coward, but plenty of slashers have a nasty habit of removing the spine he does have.
Akechi Mitsuhide of Samurai Warriors frequently gets affected by this, especially when paired with Oda Nobunaga. While he is emotionally vulnerable, some writers seem to ignore his courage and determined defense of his beliefs in order to make him a spineless follower and devoted slave of the Demon King.
Akira of Togainu no Chi. Debatable and may or may not be justified or even exist depending on which route is taken. He starts off as a strong and confident fighter, with no need to rely on anyone else. When he encounters certain sex scenes, he becomes like a typical Uke. This is justified through excessive guilt from the death of Keisuke in Shiki's route.
This happens to three characters in particular in Bully
Kirby Olsen is a Jock who plays wide receiver on the football team and is the youngest student in the school to receive a varsity letter. He also has a foot fetish. He regularly gets derailed into a whiny priss who'd rather go shoe shopping than tackle a nerd.
Derby Harrington is the leader of the Preppies clique and a very competent boxer. However since he doesn't like to get his hands dirty, he usually has his friend and dragon Bif Taylor do the fighting. This gets twisted until Derby's entirely helpless and relies on Bif for everything.
Larry "Peanut" Romano is Johnny Vincent's best friend and is actually hinted to have a gay crush on him. However, Peanut's no less willing to fight than the rest of the Greasers, and he has a chip on his shoulder over his nickname. In fanfic, he spends a lot of time being beaten up by Preppies and running to Johnny for comfort.
In Mega Man X, the title character X goes through this a lot due to his pacifist leanings. X7 actually serves as something of a canon example when X, after nearly losing Zero in a previous game, actually refuses to fight at all for the entire first half of the game. This, incidentally, is one of many reasons why X7 is to this day considered the worst game in the series.
For a while, Bayonetta was in this mode in doujins until her creator spoke up against this. Since then, she has now taken the power back.
There's a comic/series of comics on deviantART (pre-"My time here is ogre" edit) that turns Shadow from a quietly brooding badass into a constantly sobbing wreck when speaking withhis friendShrek. The artist insists that they aren't meant to be in a relationship, though.
Waylon Park is a Badass Normal software engineer who breaks out of an asylum filled with rampaging killer mutants, narrowly escaping death and dismemberment multiple times. However his Nice Guy persona and the fact that at one point he gets stripped naked and strapped to a table so he can be made into a woman courtesy of a buzz saw to the genitals means the fandom turns him into the Uke for pretty much every other male in the game, often subjecting him to mental, physical, and sexual abuse. The most popular ship pairs him up with Eddie Gluskin (aka THE GUY WHO STRIPPED HIM NAKED, STRAPPED HIM TO A TABLE, AND ATTEMPTED TO CUT HIS JUNK OFF WITH A BUZZ SAW.)
Fan Fic based on Webcomics
There are quite a few pieces of fanart where Gamzee from Homestuck is the uke to Equius' seme. While it's true that Equius is canonically The Big Guy among the trolls, it is absolutely bizarre considering that Gamzee, while he's initially a lovable dope, is the one who eventually kills Equius. Not to mention that Equius is instinctively subservient to Gamzee due to his blood. If Gamzee actually encouraged a relationship, Equius would insist on being the uke.
Tavros is also a common victim of this. In canon, he's a Shrinking Violet, but also quite passive-aggressive when pushed and one of the most emotionally stable (and powerful) trolls. (After Character Development takes place, he stands up to Vriska and abandons her in the afterlife) However, in a lot of Tavros/Gamzee fanfiction, he's reduced to a spineless crybaby who can't do anything for himself.
In the worst case scenario, Critic is usually reduced to getting raped/having to give blowjobs or playing the Distressed Dude. Partly because the authors find it funny or hot to crush him completely and leave him like that, so it's not quite as horrible as some other examples.
Poor, poorPrince Zuko. Some fics take the "Zuko never tops" meme and amp it Up to Eleven, mostly Jet/Zuko fics in which Zuko is Jet's submissive little butt-boy... or worse, babymama. The really bizarre thing about this is that before Zuko and Jet actually met in canon, Zuko usually topped.
Aang himself gets this too.
Interestingly enough, Mako gets this treatment in Legendof Korra when paired with Korra. Korra being dominant in their relationship became such a trend that some fanfics would even specify which one of them was dominant in the fic, which is a first for fiction about a heterosexual pairing.
Tweek is hyperactive, emotional and is usually paired with Craig Tucker, who is definitely taller than him (due to the fact that Word of God mentions Craig has grown the most from all the boys in his class; plus, he even was taller than the others even before his growth, as obviously seen in the drawings, and he's the oldest kid in class, as he reaches 10 years old much earlier than the rest of his classmates), dark haired and stoic, making him the perfect polar opposite. In the show, Tweek is Properly Paranoid, addicted to coffee and scared of almost anything, as opposed to Craig, who is down-to-earth and stable, which implies that Tweek needs protection and the only one who can offer him that is actually Craig.
Toki and Skwisgaar. Despite the brutal nature of the show, it's extremely rare to find a fic that doesn't write either or both of them as weeping, self-harming schoolgirls who only need the healing light of cock. Charles and Pickles occasionally suffer from this, though it's usually Pickles and his family problems that turn him into a submissive, spineless, crying uke, bonus points if there's incest with his scumbag brother, Seth.
Edd from Ed, Edd n Eddy gets hit with this. He gets turned from a sensitive guy to an all-around stereotypical uke; often with an exaggerated Edd, Eddy, or Kevin as the seme. Eddy gets this to, sometimes even when Edd is the Seme; though typically when he's paired with Kevin or sometimes Ed. He gets turned from his brash normal self into a blushing Tsundere. Occasionally Jimmy will also turned into a uke, though he's similar to the Butter's examples, even with Sara, listed above and has become more masculine (or at least aggressive) over the series.
Robin from Teen Titans often gets this when paired with Slade. Canonically, he's a serious, if somewhat Hot-Blooded, and capable leader. In slash fic, he's often written as naive and submissive.
Pietro Maximoff(Quicksilver) from X-Men: Evolution. True, he is a lot more feminine, and also fits the stereotype of the traditional uke more than his usual slash partner Lance(Avalanche). But that doesn't mean he needs to turn into a weepy teenage girl in so many Lance and Pietro fanfics.
This is extremely common in Formula One fanfiction, mostly for the younger racers.
Featured in almost all of the Mitt Romney/Paul Ryan Parody Fics that came out during the 2012 U.S. presidential election. Most were as much about mocking common Slash Fic tropes as the candidates themselves.