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[[quoteright:310:[[Film/TheNuttyProfessor1996 http://static.tvtropes.org/pmwiki/pub/images/nutty_professor_alter_ego.png]]]]
[[caption-width-right:309:Instant Ladies' Man, Just Add AppliedPhlebotinum.]]

->'''Yugi''': You're in love with me, right?\\
'''Tea''': Actually, I'm in love with your sexy alter ego.\\
'''Yugi''': Oh. (''small beat'') Well this is kind of awkward.
-->-- ''WebVideo/YuGiOhTheAbridgedSeries''

This trope is for characters of any gender that have an alternate form or identity that is much sexier than their normal mode. It's not necessarily because their "civilian" mode is ugly, but it is generally more mundane or otherwise less appealing than their "heroic" mode. Depending on the genre, the changes can be accomplished through either regular means such as acting and swapping wardrobes or though various [[MagicAndPowers magical]] or [[AppliedPhlebotinum phlebotinum-driven]] methods. This usually involves a change in a character's physical appearance, but sometimes it's purely a change in personality traits and behavior, suggesting that the character in question is deliberately [[ObfuscatingStupidity making themselves appear unattractive]] to hide their SecretIdentity.

Naturally, it often results in LovesMyAlterEgo.

Given that sexual attractiveness is subjective, the best examples are those when the sexier nature of the alternate form is shown from the perspective of another character reacting to them with subtle flirting and innuendo that otherwise wouldn't be present. That said, it's generally pretty clear when the creators of the story are trying to change someone from HollywoodHomely (or even downright ugly) into MsFanservice or HelloNurse.

This often overlaps with SplitPersonality, {{Shapeshifting}}, OlderAlterEgo, and SuperpoweredAlterEgo.

Compare ADarkerMe. Compare also to ShapeshiftingSeducer where a shapeshifter capable of assuming many forms takes on several in an attempt to appeal to a specific person. SheCleansUpNicely should be used for when a character changes from their usually dull or unattractive wardobe, hairstyle and such to be more attractive (particularly at a formal event) however this new appearance is not associated with an alter ego or alternate physical form. Also see EvilIsSexy.

See also BishounenLine for when a monstrous character gets sexier once they hit a certain power level.



[[folder:Anime and Manga]]
* ''Manga/MahouSenseiNegima''
** Negi Springfield and Kotaro both use age-up pills to change from AdorablyPrecociousChild and BadassAdorable to {{Bishonen}} from time to time.
*** The former case, which is called Nagi (Negi's father's name) by certain people, also ended up fooling Evangeline as well as infatuating Ako Izumi.
** [[OurVampiresAreDifferent Vampiric]] CuteWitch Evangeline A.K. Mcdowell is a similar case. She has the body of a 10 year old girl, but uses magic to become older and very much TheVamp.
** Chisame, a fairly normal looking, geeky girl, who combines cosplay, TheGlassesGottaGo and computer graphics editing to make herself into famous web idol Chiu. Eventually she gets an artifact that allows her to do much the same process magically.
* ''Manga/MeruPuri'': Aram is under a curse that causes him to age up to a teenager when exposed to the dark, likewise changing him from a cute boy to {{Bishonen}}. Of course, to the girls in the manga, this might be viewed as a CursedWithAwesome ability.
* ''Manga/DNAngel'': Daisuke changes into Dark, a [[TheCharmer suave]], TallDarkAndHandsome, older looking PhantomThief who is the heart throb of most of the ladies, except for Riku, who prefers Daisuke.
* In ''Manga/YuYuHakusho'', Koenma (usually in the form of an infant with a pacifier) is able to take on an older, more {{Bishounen}} appearance. Admittedly, an older more bishounen appearance with a pacifier, but its the thought that counts.
* In ''Manga/DGrayMan'', the [[BigBad Millennium Earl]] normally uses a goblin-like form but occasionally takes on a normal human form.
* ''Anime/TenchiMuyo'':
** [[ReallySevenHundredYearsOld Really 20,000 Years Old]] Washu Hakubi normally looks like a young teenager, and she pulls a fast one on Tenchi by unexpectedly transforming into her adult form to seduce him which is, needless to say, much more well endowed. The "alter ego" is her true form, but she's spent most of life in the younger form because she long ago decided that adult society was just too screwed up for her to want any part of.
** Arguably applies to Sasame and Tsunami as well, although in this case it's more ''just growing up''.
* Yugi in ''Anime/YuGiOh'' is an {{adorkable}} cute boy, but the [[SuperPoweredAlterEgo spirit of the puzzle]] is a full out {{bishonen}}, who is far more successful at attracting [[LovesMyAlterEgo Tea's attention]] than Yugi. Lampshaded, of course, in ''WebVideo/YuGiOhTheAbridgedSeries'' (see the current page quote, above).
* ''Manga/TenjouTenge'' has Maya Natsume, who actually inverts this trope. Her real form is that of a voluptuous young woman, but she spends most of her time is spent in the form of a young girl, making most people think it is her regular form.
-->"Bob? If that weird little girl suddenly turns into the kind of stacked voluptuous chick you’d see working in a sketchy nightclub, what should I do?"
* When shy Aimi Komori applies her magic eye shadow, she becomes the sexy, superpowered cat burglar Manga/ShadowLady.
* In ''Manga/ZettaiKarenChildren'', there's a HospitalHottie who also happens to be a powerful [[PsychicPowers Esper]] with powers of illusion. It's eventually revealed that her perky-and-pretty appearance is ALSO an illusion, which she maintains whenever anyone's around - underneath it, she's got a face straight out of a ''Film/HammerHorror'' movie - think 'Frankenstein' more than 'Dracula'.
* ''VisualNovel/KichikuMegane'' stars the adorable, shy, [[ExtremeDoormat door matty]] uke Saeki Katsuya, who turns into a [[BespectacledBastardBoyfriend sadistic and sexy]] seme when he puts on his glasses.
* Makoto in ''Manga/{{Nicoichi}}'' is much more attractive (and popular) in his [[WholesomeCrossdresser female persona]] than his normal self.
* Moka from ''Manga/RosarioToVampire'', when she transforms from Outer Moka into Inner Moka. This is especially evident in the anime where a lot of the transformation sequence is just her, um, various assets almost doubling in size. Also, Inner Moka's voice is deeper and much more sultry than Outer's. Possibly a bit subverted later on because [[spoiler: Inner Moka is actually the real personality and Outer is the alter ego created to tone down her powerful vampire aura.]]
* ''Manga/AhiruNoOujisama'' has Reiichi and Omae. Reiichi can change back, Omae can't.
* In ''Anime/KillLaKill'', Ryuko's scruffy old homeroom teacher, Aikuro Mikisugi, can reveal himself to be a ridiculously {{bishonen}} and [[YouCanLeaveYourHatOn chronically stripping]] member of LaResistance with little more than a HairFlip and GlassesPull.
* Kinji in "LightNovel/AriaTheScarletAmmo", normally tries to avoid anything even remotely romantic to avoid going into Hysteria mode. When he goes into it, he becomes a smooth ladies man.
* The main character of ''LightNovel/AccelWorld'', Haru, is [[OlderThanHeLooks a chubby looking teen]] with a tall and slender robotic avatar called "Silver Crow" which he uses exclusive in the titular virtual reality fighting game.
* Natsuki from ''VisualNovel/UtaNoPrinceSama'' may count. He turns into [[ADarkerMe Satsuki]] when he takes off his [[{{Megane}} glasses]].
* [[SuperpoweredEvilSide Black Hanekawa]] from LightNovel/{{Bakemonogatari}}. While Araragi always thought that [[HollywoodHomely Tsubasa]] [[{{Meganekko}} Hanekawa]] was an attractive girl, when "Black Hanekawa" appeared the first few times, her normally black hair turned white, wore lingerie fit to be in a Victoria's Secret catalog, showing off her surprisingly fit, lithe body, and also had cat ears and spoke with 'nyaa's. What made her dangerous was that even a mere touch would painfully drain the life force out of said person, regardless of whether or not she wanted to, and she was smart enough to pose a threat even to the strongest of supernatural creatures. The only times she would appear was when Tsubasa was extremely stressed out so the 'Cat' took over and rampaged on the town to relieve said stress.

* ''Franchise/SpiderMan'':
** Villain Stunner was an overweight and lonely receptionist who gained super strength and great beauty through virtual reality technology.
** Black Cat considered Spider-man himself to be this, as she tried very hard to get romantic with him, but was not remotely attracted to Peter Parker, and consequently the big moment where he unmasked himself to her as a sign of commitment ended with her asking him to put his mask back on. In the ComicBook/UltimateMarvel version she actually threw up, though this was just the {{Squick}} factor of realizing how young he was.
* DC Character Looker was a frumpy librarian until she got her powers, and then she could turn into a redheaded hottie. Eventually, though, after she became a vampire, the sexy became her ShapeshifterModeLock.
* ComicBook/{{Shazam}}:
** Captain Marvel. Not that Billy Batson is ugly, but Cap is better looking (not to mention Not Jailbait). This is explained in comics set in the future that show that Captain Marvel is what he looks like as an adult. Utilized in the ''ComicBook/BillyBatsonAndTheMagicOfShazam'' continuity, where Billy is stuck in a LovesMyAlterEgo situation with a ComicBook/LoisLane {{Expy}}.
** Likewise with his twin sister Mary Batson, and her alter-ego Mary Marvel.
* The titular ''Comicbook/{{WITCH}}'' are fairly average (albeit skinny) teenagers in their normal form. When transformed however, they are changed to look much more... adult. Lampshaded on more than one occasion.
* Both Prime and Elven from ''ComicBook/TheUltraverse''.
* Compare mousy Jennifer Walters to the AmazonianBeauty [[GreenSkinnedSpaceBabe Green-Skinned Babe]] that is the ComicBook/SheHulk.
* [[InvertedTrope Inverted]] with Big Bertha of the ComicBook/GreatLakesAvengers. Her superheroine form is immensely fat, while her regular form is the most popular swimsuit model in Wisconsin. {{Deadpool}} prefers her as Big Bertha... but then, he's Deadpool. As of the team's [[Comicbook/MarvelNow2016 2016 series]] either her civilian form is fat too or she gave up transforming on some level, as she's now [[BigBeautifulWoman a plus-sized model]].
* Franchise/{{Superman}} sometimes falls into this, particularly in the earlier ages, with his Clark Kent persona wearing mild-mannered clothing, general weak posture, and self-effacing personality, contrasting Superman's tight clothing, powerful stance, and determined attitudes.
* A RunningGag in the French comic ''{{ComicBook/Melusine}}'' is that her werewolf boyfriend always runs away before sunrise (interrupting the romantic moment and leaving her confused) because it turns out his human form is a textbook specimen of the GeekPhysique (and he's all too aware of it: every such strip ends with him scrawny and bespectacled saying "Can't let her see me like this").

* Stanley Ipkiss, from ''Film/TheMask'' film. Note that he's not more physically attractive (unless you're into that sort of thing), but more confident and impulsive (and gets {{reality warper}} powers), and consequently has more luck with his LoveInterest. As is often the {{Aesop}} with such tales, the Mask only highlights personality traits already present, and brings out the ones the wearer keeps inside. Stanley, by the end of the film, has ''become'' a more confident and assertive person, meaning he has no need for the Mask anymore to be attractive to his love interest.
* This was a main plot point in both versions of ''Film/TheNuttyProfessor''. In both versions, the titular professor invents a way to change himself from a nerdy looking fellow in the original film (and a rather overweight guy in the remake, as shown in the page image) into a smooth ladies man. The original even concluded with [[spoiler: the titular professor coming clean to a large group of people while he lets the formula wear off. There are no cuts, and both the professor and his alter ego were played by Jerry Lewis, so the transformation is almost entirely just Lewis ''changing his physical mannerisms'' and putting on a pair of glasses.]]
* Anne Bowman from ''Film/PsychoBeachParty'' (Chicklet's SplitPersonality) looks the exact same during her scenes but her confidence and behaviour, using her body language, makes her much more of a sex object than Chicklet's shy and Tomboy-behaviour. In-Universe, that is.
* Probably inevitably, there have been at least two versions of ''Literature/TheStrangeCaseOfDrJekyllAndMrHyde'' in which Jekyll changes [[GenderBender from man to]] [[AttractiveBentGender (gorgeous) woman]]. The older version, ''Dr. Jekyll and Sister Hyde'', was a Film/HammerHorror movie that dragged in Burke and Hare and UsefulNotes/JackTheRipper, to boot. The second was ''Dr. Jekyll and Ms. Hyde'', which was more of a comedy, though Ms. Hyde was [[AlphaBitch still evil]].
* Tyler Durden (Creator/BradPitt) in ''Film/FightClub'' is The Narrator's (Creator/EdwardNorton) more charismatic alter-ego. In his own words, he "look(s) like you want to look and fuck(s) like you want to fuck." Interestingly, since he only looks like Brad Pitt to the Narrator, the difference is entirely in his actions and attitude.
* ''Film/BatmanReturns'' puts this in play for Catwoman - instead of a confident and seductive professional thief, Selina Kyle is a mousy secretary for [[Creator/ChristopherWalken Max Schrek]], and only dons the black vinyl cowl for revenge after he pushes her out a window to her not-quite-death.

* In ''God Stalk'', the first volume of P.C. Hodgell's ''Literature/ChroniclesOfTheKencyrath'', Jame's tavern dancer persona, the B'tyrr, is this. It's partly the rather revealing and sensual Senetha costume she wears, described as revealing "much skin in unexpected places", but also the dance, which is magically seductive. Since this is so not Jame's persona otherwise, people who've seen her as the dancer generally don't recognize her regular persona in public.
* Alex, in ''Literature/TheOtherKindOfRoommate'', comes off to Beth as only only slightly better than the serial killing, international crime lord she pictured. Her second impression of him is when [[SuperPoweredEvilSide Xander's in control]], who not only gets her flirting and giggle-snorting in the space of ten minutes, but has her noticeably disappointed when Alex comes back the next day.
* In ''Literature/SisterPelagia'' series by Boris Akunin, the eponymous protagonist often has to disguise herself as her own sister for the needs of her investigations, wearing alluring female clothing and even flirting with men.

[[folder:Live Action TV]]
* ''Series/FamilyMatters'': Supreme nerd Steve Urkel is in love with one of the other main characters Laura, but his nerdiness and forwardness repulses her. He creates a machine utilizing a concotion he calls "Boss Sauce" to become Stefan Urquel, a sexier version of himself who was a smooth ladies' man and just as smart as Steve (though it was subtly implied Steve was just a little bit smarter). However, the first time usage also had Stefan be a world-class jerk. Later iterations had Steve perfect the formula so Stefan would retain Steve's positive qualities like his niceness and even attempted becoming Stefan permanently. Later Stefan became his own man when Steve cloned himself and Laura decided to use the clone to become Stefan. Stefan himself addresses Steve as "the man who created him."
* The ''Series/AreYouAfraidOfTheDark'' episode "The Tale of the Dark Dragon" had two students taking a special serum that made them temporarily into their "true" selves (more good looking, confident etc). Once they were able to accept their deep psychological issues, the transformation became permanent.
* Candice from ''{{Series/Heroes}}'' casts illusions of her appearance (similar to Shapeshifting, but her shape doesn't really shift it just looks like it). She usually appears as a HotChick but her real appearance is a lumpy, acne covered mess named Betty.
* In the ''Series/StarTrekTheOriginalSeries'' episode "Mudd's Women", Mudd has pills that he claims makes a woman more attractive. [[spoiler: It was eventually revealed that a placebo produced the same results, with the Aesop being that attitude and confidence is what makes a woman attractive. Of course, given that they clearly showed women physically changing as a result of the pill rather than just acting differently, it was something of a BrokenAesop.]]
* ''Series/{{Jekyll}}'': Most people seem to consider Tom Jackman's [[EvilIsSexy alter-ego Mr.Hyde to be considerably sexier]] than Jackman, with even two lesbian characters agreeing that he's hot. Katherine Reimer (Jackman and Hyde's assistant) is seemingly the only person who considers Jackman better looking than Hyde.
* In ''La Fea Mas Bella'', one of the many incarnations of ''Series/YoSoyBettyLaFea'' (''Series/UglyBetty'' in the US), it turns out that the protagonist's ugliness is completely fabricated. Her alter ego, Aurora, is a model for the very same magazine where she works.
* The main heroine of the now defunct American soap opera ''Series/OneLifeToLive'', Victoria Lord, had DID, but her most recurring personality was Niki Smith, who was more sexual and less uptight in behavior and appearance, but DependingOnTheWriter was also self-destructive and sociopathic.
* In ''Series/SabaDoll'', middle-aged teacher Shijimi Usa uses makeup and cute clothes to transform herself into 17-year-old national IdolSinger Mayu Watanabe.

[[folder:Video Games]]
* ''Franchise/FinalFantasy'':
** Cloud's 'ex-SOLDIER' personality in ''VideoGame/FinalFantasyVII'' is a cool, hypercompetent, swashbuckling NinetiesAntiHero [[AllGirlsWantBadBoys who is irresistible to women]] and [[EvenTheGuysWantHim men]] - even though he's also a total jerk. His original personality is that of the unpopular town dork, and quite hesitant and awkward.
** In ''VideoGame/FinalFantasyXIII2'', it's implied that [[spoiler:Chocolina]] is actually this to [[spoiler:Dajh's Chocobo chick]]. This is later [[spoiler:confirmed]] in Sazh's DLC story. [[spoiler:As it turns out, she got caught in the distortion just like he did, and wanted to help the others just like they always helped her, so Etro gave her the form of an attractive woman and the ability to be everywhere at once]].
* In ''VideoGame/ArTonelicoQogaKnellOfArCiel'', playable Reyvateils have multiple personas, some of which are older and sexier than the main teenaged ones.
** A character named Mute is a [[AmazonianBeauty hyper-masculine woman]]. She has an alternate TokenMiniMoe form, where she suddenly becomes a lot less agressive and argubly cuter.
* In ''VideoGame/AzureStrikerGunvolt'', Joule's powers manifest into an EnergyBeing known as Lumen, the Muse (Cyber Diva in Japan). Joule is a 13 year-old girl, while Lumen is probably what she'd look like when she's 4 years older, mixing this with OlderAlterEgo. The two of them were actually compared to each other by Gunvolt and their friend Zeno (who's a fan of Lumen back when she was still a celebrity) and the latter explicitly states that he "likes the parts of [Lumen] that are all grown-up and bouncy."
** ''Azure Striker Gunvolt 2'' reveals that [[spoiler:[[MasterOfIllusion Zonda's]]]] true form is that of [[spoiler:a young girl probably no older than Joule. Her male and female forms that she uses in her boss battle and were originally presumed to be her true form, on the other hand, are MrFanservice and MsFanservice respectively as they look like they're in their late teens to early twenties and represent the sin of {{Lust}}]].
* ''VideoGame/{{Persona 5}}'': The Protagonist normally presents himself as a mild mannered high school student with dorky glasses, but becomes a suave GentlemanThief during his illicit activities to reform corrupt members of society.

[[folder:Web Comics]]
* In ''Webcomic/BusterWildeWeerwolf'', Bernard the human has only one known ex-wife while Buster, his werewolf alter ego, has plenty of people's phone numbers and is able to hook up with almost any man in just a night.
* Played with in ''Webcomic/GirlGenius''. Agatha [[GrandTheftMe unwillingly shares her brain]] with her mother, the BigBad of the series. Although they obviously share the same body and therefore don't change physical appearance, it's ''very'' obvious when it's Lucrezia in charge, and when it's Agatha. The first thing Lucrezia did was [[http://www.girlgeniusonline.com/comic.php?date=20060208#.VvVr3-KLTIU strip down to her underwear]] and flirt with the son of one of her devoted followers, whereas when Agatha [[http://www.girlgeniusonline.com/comic.php?date=20051128#.VvVtI-KLTIU wakes up strapped to an operating table in her underwear]], the first thing she demands is her clothes. It's got to the point where her love interests can tell when Lucrezia is influencing Agatha's actions, which happens when she's tired or stressed, just because [[http://www.girlgeniusonline.com/comic.php?date=20101129#.VvVt9OKLTIU she flirts with them more]].

[[folder:Western Animation]]
* In ''WesternAnimation/{{Animaniacs}}'' Minerva Mink had a nerdy wolf AbhorrentAdmirer who [[OurWerewolvesAreDifferent turned sexy under a full moon]].
* Bluster Kong in the CG ''WesternAnimation/{{Donkey Kong Country}}'' cartoon accidentally created a Nutty Professor type potion in one episode. It turned him from a sniveling, cowardly, balding ape into a smooth talking ladies' gorilla called Leo Luster. Candy Kong forgets about her date with DK and falls for him instantly. His coolness is so potent that he can use it to hypnotize King K. Rool and his goons into giving back the Crystal Coconut willingly. [[http://www.youtube.com/watch?v=pSHX1BvmN_4 And he does it all through a catchy musical number!]]
* Present in the ''WesternAnimation/{{WITCH}}'' television series as well as the comic above. Cornelia even wonders at one point if she can date older boys in her Guardian form. [[spoiler:In Season Two she does just that with Taranee's older brother.]]
* On ''WesternAnimation/{{Recess}}'', when Gus loses his glasses, all kids outside his small circle of friends no longer recognise him and mistake him for a new kid. He takes on a new cool kid identity, Guy, and several girls crush on him throughout the episode.
* An episode of ''WesternAnimation/CodenameKidsNextDoor'' had Hoagie gets turned into a cool teenager, whom he dubs "Hank", uses his new persona to date [[TeensAreMonsters Cree]].
* ''WesternAnimation/{{Jem}}'': Jerrica Benton is an attractive young woman in her own right, however her alter ego Jem is a knockout who [[DudeMagnet draws men like bees to honey]]. Part of it is due to the clothes Jem wears compared to Jerrica while another part is how Jem acts more open and flamboyant than Jerrica. Jerrica's [[ChildhoodFriendRomance long-time crush]] Rio likes both [[TwoPersonLoveTriangle Jem and Jerrica]]. Season 3 introduced Riot, who [[LovesMyAlterEgo loves Jem]] but ignores Jerrica.