[[quoteright:238:[[Anime/SailorMoon http://static.tvtropes.org/pmwiki/pub/images/mamoru-is-that-one-guy-in-sailor-moon_3339.jpg]]]]
[[caption-width-right:238:[[CaptainObvious The one on the left.]][[note]][[YourOtherLeft The blond one with the red bow?]][[/note]]]]
That's short for "The one guy associated with [[AmazonBrigade a team otherwise consisting entirely of females]]." No need to get rabid jealous, though, guys -- this isn't the HaremGenre. At the most, The One Guy will be in a committed relationship with '''one''' of the members -- or [[DungeonmastersGirlfriend he wants to be]]. His membership can range from loose ally to close friend to part of the actual fighting team. Either that, or just some guy who [[NonActionGuy rarely ever actually does anything]] other than serve as a little [[MrFanservice guy candy]]. He will usually be involved in plots that require guys, as well as be a non-threatening and harmless crush object for the assorted cast as needed. Could become TheFace of the group, should the rest of them [[{{NoSocialSkills}} lack social skills.]]

The SpearCounterpart to TheSmurfettePrinciple. Occasionally TheDitz, or serves the same purpose of rounding out the cast as TheFace, and for equally uncertain reasons is less likely to occur on evil teams.

Remember, not all characters who serve as the only male in the group automatically count for this trope. If he is the main protagonist, he does '''not''' count as this trope.

Not to be confused with ThatOneGuy or ThoseTwoGuys, and unrelated to MyHeroZero.
----
!!Examples:

[[foldercontrol]]

[[folder:Advertising]]
* Advertising/{{Orangina}} mostly always have females, with the exception of four species, and in true fashion, they enjoy a ShirtlessScene in the ads.
* An installment in 2014's Lily Allen AT&T 3G campaign has Lily extolling a phone plan to a team of businesswomen in power suits with one guy off to the side and not really being addressed as directly as the women. Not lampshaded at all, perhaps to suggest this can and should be a perfectly suitable example of their team.
[[/folder]]

[[folder:Anime and Manga]]
* Kyohei of ''Anime/BurstAngel''; official Dude In Distress and NonActionGuy, took a part-time job as the team's chef.
* ''Franchise/SailorMoon'':
** Mamoru aka Tuxedo Kamen, Sailor Moon's MysteriousProtector and [[SatelliteLoveInterest official love interest]].
** The Black Moon Clan in ''Anime/SailorMoon R'' is a villainous example. Predictably, Rubeus uses his charms to deliberately twist his minions.
** Dr. Tomoe of ''Sailor Moon S'' essentially commands the Witches 5, as well as Kaolinite. [[spoiler:In the anime, he turns out to also be possessed, and winds up the only survivor from the Death Busters.]]
* ''Manga/TokyoMewMew'' has [[spoiler:Masaya Aoyama aka]] Ai no Kishi/Blue Knight
* Kaito Doumoto of ''Manga/MermaidMelodyPichiPichiPitch'' almost does the same thing... [[LaserGuidedAmnesia almost]].
* ''Franchise/LyricalNanoha'':
** Erio in ''Anime/MagicalGirlLyricalNanohaStrikerS'' is the only nominal lead male in the entire main group. Yuuno and Chrono were relegated to sidekicks (at best) in ''[[Anime/MagicalGirlLyricalNanohaAs A's]]'' and [[DemotedToExtra only have a couple of cameos]] in ''[=StrikerS=]'', and [[LittleBitBeastly Zafira]] had to spend all the third season as a ''dog''.
** Zafira is The One Guy of the Wolkenritter.
* Mackie in ''Anime/BubblegumCrisis''. Sorta joined by Nigel in ''2040''.
* ''Anime/PrettyCure'':
** Coco and Nuts of ''Anime/YesPrettyCure5'', [[ShapeShifter when they're not]] the TalkingAnimal mascots. Season two adds Syrup, another shapeshifting mascot.
** Seiji Sagara from ''Anime/HappinessChargePrettyCure'', although he doesn't help the girls fight.
* Asuta from ''Manga/KashimashiGirlMeetsGirl''...er, [[GenderBender ultimately]].
* Yuuji in ''Manga/BambooBlade''. Considering the only other males around him are Coach Koujiro and [[{{Gonk}} Dan]], who [[OfficialCouple has a girlfriend]], he's mostly ignored, and he does [[LampshadeHanging lampshade]] this fact.
* There are several men on ''Anime/MartianSuccessorNadesico'', but only one, Jun Aoi, is a regular member of the bridge crew (as opposed to a civilian who hangs out on the bridge giving ExpoSpeak or looking ominous). Akito's also the only male member of the kitchen staff and, for about a third of the series, the only male pilot - however, he's the lead.
* Kyoutaro from ''Manga/{{Saki}}''. He's the only guy in the TabletopGame/{{Mahjong}} Club and, from what it seems, the only teenage male in the entire series, since most of the schools competing are all-girls, and the mahjong tournament is separated by gender. He's treated more like Yuki's errand boy, if anything, especially since he's by far the weakest player in the club.
* ''Manga/AzumangaDaioh'''s own [[DirtyOldMan Kimura-sensei]] is the only named male character who isn't an animal.
* Akemiya from ''Manga/SasamekiKoto'', who is also a WholesomeCrossdresser.
* Makoto from ''Manga/{{Amanchu}}'', being Ai's hapless twin brother.
* Komachi from ''Chu-Bra''. Thanks to his big mouth, he's the only guy in the Underwear Appreciation Society, and Nayu and her friends are clearly more interested in debating which type of panties fit them best than paying much attention to Komachi.
* Although he's the main character, Shinkuro of ''LightNovel/KureNai'' is also the only heroic recurring male character. All of the other major characters are female, of varying ages.
* Kada is The One Guy from the ''VisualNovel/KoihimeMusou'' anime. He shows up in a handful episodes during the second and third season and is the only character that is both heroic and male in the series. All other males are villains, {{mook}}s, or just not very good at fighting.
* Akira in ''Manga/AiOreLoveMe'' is the only boy in an otherwise all-girls band. Ironically, he's the one with the most feminine looks.
* Mikiya is the only recurring male character among the protagonists of ''LightNovel/KaraNoKyoukai''. He's also a NonActionGuy.
* Detective Edward from ''Manga/TetragrammatonLabyrinth''. Unsurprising as it is YuriGenre.
* Keiichi Maebara from ''VisualNovel/HigurashiWhenTheyCry'' is the only guy in the main cast.
* Homura and Mutsu, from ''Manga/{{Sekirei}}'', are this to their respective {{Battle Harem}}s by virtue of males being exceptionally rare. Homura's case becomes a little more... complicated later on [[spoiler:due to GenderBender issues]]. Having been The One Guy and OnlySaneMan for [[DemonHead the]] [[LovableSexManiac first]] [[HardDrinkingPartyGirl generation]], Mutsu expresses his sympathy to Homura for having inherited that role.
* In ''LightNovel/InfiniteStratos'', Ichika is pretty much the one guy who can pilot an [[PoweredArmor IS Suit]].
* Chrono from ''Manga/ChronoCrusade''. Somewhat justified, as he lives in and works for a [[ChurchMilitant convent]].
* {{Invoked|trope}} in ''Manga/SeitokaiYakuindomo'', in which Takatoshi Tsuda was shanghaied into the Ousai Academy High School's Student Council "for a male prespective" in a school that's just turned co-ed. Justified as he belongs to the first male intake for a previously girls-only school, and the gender ratio is still extremely skewed towards the females.
* In ''Anime/PuellaMagiMadokaMagica'', Kyousuke, Sayaka's crush, is the only male character of any importance. Kyubey ''might'' be an example; the other characters use masculine pronouns to refer to him, but being [[spoiler:a {{Starfish Alien|s}} with NoBiologicalSex]] puts him more into the AmbiguousGender camp.
[[/folder]]

[[folder:Comic Books]]
* Chase Stein of ''Comicbook/{{Runaways}}'' was the only boy in the group for a short time. Non-powered (after he lost the fistigons); drove the Leapfrog; dated Gert, the girl with the dinosaur.
* Hawk is the only guy in the 2010 relaunch of the historically all-female ''ComicBook/BirdsOfPrey''. Obviously, it's because Hawk and Dove are a package deal and his bird motif certainly fits in otherwise. In the Comicbook/{{New 52}} ''Birds of Prey'' series, Condor joins the originally all-female team in issue 16.
* Scott Lang, the second ComicBook/AntMan, is the only male chosen by the Comicbook/FantasticFour to replace them in what's supposed to be a four minute absence from Earth. He joins Comicbook/SheHulk, [[ComicBook/TheInhumans Medusa]] and Johnny Storm's current girlfriend [[UnfazedEveryman Darla Deering]] a.k.a. Ms Thing.
* Takara in ''Manga/RisingXRydeen'' is the only boy and leader of his superpowered team. This is because the higher-ups for the organization he works for are a bunch of [[DirtyOldMan dirty old men]]. They wanted an all female team, but, for reason's unexplained, Takara is part of their grand plan so they reluctantly added him.
[[/folder]]

[[folder:Fan Fiction]]
* In ''Fanfic/BoysUndSenshado'', there are about 16 new male [[OriginalCharacter OCs]]. A fair portion of them join pre-existing teams as the sole male member.
* In ''Fanfic/NerveDamage'' Shirou Emiya has summoned four Saber-class Servants. They are: [[TheWomanWearingTheQueenlyMask Arturia Pendragon]], [[DarkActionGirl Arturia 'Alter' Pendragon]], [[AllLovingHero Arturia 'Lily' Pendragon]] and [[MsFanservice Nero Claudius Caesar Augustus Germanicus]]. All are [[GenderFlip genderswaps]] of the actual people they're based on. [[ActionGirl All of them kick ass]].
[[/folder]]

[[folder:Literature]]
* In ''Literature/ABrothersPrice'', most men are the only brother in their family, due to male GenderRarityValue. Jerin, who is lucky enough to have brothers, becomes the only guy when he is invited to a ball along with some of his sisters. He meets Cullen, who is the only guy in his whole family, and is excited about getting to talk to another male.
* Theodore "Laurie" Lawrence of ''Literature/LittleWomen'': next-door neighbor, in love with Jo, got over it (despite [[FanPreferredCouple the desires of the fandom]]), fell in love with and married her sister Amy.
* ''Literature/TheBabySittersClub'', Logan, Mary-Anne's boyfriend, and later [[AmbiguouslyGay Ducky]] in the ''California Diaries''.
* Damian in ''Literature/TheHouseOfNight''.
* The first series of Creator/TamoraPierce's ''Literature/CircleOfMagic'' quartet has Briar Moss as the only dude. They even live with two [[HideYourLesbians foster mothers]], with Niko visiting only occasionally.
* The Gunnery Officer on the [=ScreeWee=] ship in ''[[Literature/JohnnyMaxwellTrilogy Only You Can Save Mankind]]''. Since [=ScreeWee=] gender politics are exactly opposite to human ones, he's inclined to over-compensate.
* In the ''Literature/{{Discworld}}'' book ''Discworld/MonstrousRegiment'', [[spoiler:the lieutenant turns out to be the only male in the entire squad]].
* Mark is the only boy in the family in the Creator/EdwardEager book ''Half Magic''.
* In many ''Franchise/NancyDrew'' stories, Nancy's boyfriend Ned Nickerson counts compared to Nancy, Bess and George.
[[/folder]]

[[folder:Live Action TV]]
* In ''Series/{{Smallville}}'', interestingly, for some time in the middle seasons - after Lex and Clark's friendship turned sour - [[Franchise/{{Superman}} Clark]] becomes this between [[TheSmartGirl Chloe]], [[ComicBook/LoisLane Lois]], and [[DamselScrappy Lana]]. Makes the BeachEpisode awkward.
* ''Series/BuffyTheVampireSlayer'':
** The Scooby Gang's makeup became increasingly female starting with Season 5. After Spike left near the end of Season 6, Xander was temporarily the only male Scooby in Sunnydale (until Giles returned in the last episode). The male demographic increased in Season 7 with the return of Spike, but the arrival of the Potentials permanently shifted things towards the female side. Xander lampshades this in one episode when he says that the Magic Box is like "NORAD, and we're at DEFCON 1" and the room full of women just stare back at him, prompting him to sigh "I so need male friends."
** Continued in ''Buffy'' Season 8, at which point Xander is pretty much the only guy in the gang -- which now includes a whole bunch more women. (Plus [[AmbiguouslyGay Andrew]] and, albeit temporarily, [[spoiler:''Dracula'']] of all people.)
* Anthony Bouvier of ''Series/DesigningWomen''.
* ''Series/{{VIP}}'' has Quick.
* Leo from ''Series/{{Charmed}}'', sometimes (male police officers were sometimes prominent, and there was Cole whenever he was on the good side of the HeelFaceRevolvingDoor.)
* Bosley in ''Series/CharliesAngels''
* In ''Series/PushingDaisies'', out of the main six characters, only two are male (although two of the women are missing from a fair few episodes).
* Henry Rush in ''Series/TooCloseForComfort''. Subverted in the second season when Jim J. Bullock (Monroe Ficus) was promoted to series regular status.
* Allen Anderson of the regular kids on ''Series/PunkyBrewster''. He left at the start of season 3 (and boy, did it break Punky's heart).
* In ''Series/NewGirl'' Schmidt is this at his job. Rather than a dream job for him, though, his work is dismissed, he's sexually harassed by his superiors, and treated as being inferior to all the women at his job. Not played for laughs all the time.
* As a first in ''Franchise/SuperSentai'' history, ''Series/HikoninSentaiAkibaranger'' has 1 male Ranger and 2 female Rangers.
* The premise of ''Series/LastManStanding'' is that Creator/TimAllen's character struggles to maintain his masculinity in a house that is mostly women (the only other male being his grandson who is too young to partake in his hobbies).
[[/folder]]

[[folder:Professional Wrestling]]
* Most nominally all female wrestling promotions have had at least one guy compete in their rings, such as Mr. Buddhaman in Wrestling/AllJapanWomensProWrestling, Whipme Spearz in the PGWA and GLORY, Masa Takanashi in Ice Ribbon, Wrestling/TAKAMichinoku in REINA and Rick Cataldo in Wrestling/{{WSU}}. Bad Boys Of Wrestling, [[CaptainObvious despite not being an all women's organization]], ran an angle about this phenomenon, where two guys came into BBOW to attack the women's {{tag team}} champions Candie and [[Wrestling/MickieJames Alexis Laree]] after running out of women's promotions to invade.
* During WWE's "Attitude Era", the stable [[FunWithAcronyms Pretty Mean Sisters]] (Wrestling/{{Jacqueline}}, Terri Runnels, and [[TomboyishName Ryan Shamrock]]) had "Meat" (aka Sean Stasiak), who was passive and obedient to all three, and heavily implied to be their sex slave.
* Wrestling/{{WWE}}'s "Wrestling/{{Santin|oMarella}}a Marella" during the "Miss Wrestlemania 25" match.
* [[Wrestling/BillyGunn Cute Kip]], the only male member of Wrestling/{{TNA}}'s Wrestling/TheBeautifulPeople
* When Wrestling/VickieGuerrero formed an alliance with Wrestling/LayCool, her boyfriend Wrestling/DolphZiggler became the one guy of the pseudo stable.
* During the massive Wrestling/{{N|ational Wrestling Alliance}}WA Vendetta Pro hosted {{crossover}}, ''Casino Royal'' 2014, the Canada vs USA match saw Shannon Ballard as the one guy on [[labelnote: Team Canada]]with Arlene James, Kat Von Heez, Sage Sin, Samantha Slides and Melissa Coates[[/labelnote]] and Short Sleeve Sampson, who some may know better as little Wrestling/{{Boogeyman}}, as the one guy on[[labelnote: Team USA]]with Kiara Dillon, Tab Jackson, Terra Calaway, Allie Parker and Andrea The Giant[[/labelnote]]
[[/folder]]

[[folder:Theater]]
* Nathaniel is the third member of and the only man on [[http://www.mrshawking.com/?page_id=231 the team]] in the [[http://www.mrshawking.com Mrs. Hawking play series]].
[[/folder]]

[[folder:Video Games]]
* ''VideoGame/{{Touhou}}'' has such a powerful ImprobablyFemaleCast that even ''these'' guys are marginalised. The ''only'' known males in Gensokyo aside from briefly-mentioned background characters are Genji (Reimu's former assistant, is a flying turtle, [[ChuckCunninghamSyndrome hasn't been seen since the PC-98 games]]), Unzan (Ichirin's assistant, doesn't have a single line, is an angry pink cloud), and Rinnosuke (only appears in one ExpandedUniverse manga). WordOfGod is that there ''are'' plenty of males, it's just that most of them don't fight so the player doesn't see them.
* "Miss X" in ''VideoGame/SNKGalsFighters'', who's really just [[VideoGame/TheKingOfFighters Iori Yagami]] in IncrediblyConspicuousDrag.
* Emon Five, one of the selectable heroes in ''VideoGame/{{Otomedius}}'', is literally the only male shown in the ''entire game''. The other characters on the team don't seem to know why he's even there.
* In ''VideoGame/FinalFantasyV'', Bartz becomes The One Guy of the party when Galuf is replaced by Krile. Humorously enough, it was originally a case of TheSmurfettePrinciple, as the party is made up of four members, with Lenna being the only one openly female, as the fourth member, Faris, tried to masquerade as a man due to being raised by pirates and becoming the captain.
* The ''VideoGame/SakuraWars'' series has the PlayerCharacter being the only male member of a team of demon-fighting mecha pilots. Justified in-universe as it's stated that usually only females have enough spritual power to pilot said mechas.
* Big Band of ''Videogame/{{Skullgirls}}'' is the first male character of the cast as DLC. Played with, in that the pre-match intro cards show the phrase "Ladies and Gentlemen(?)".
* In ''VideoGame/PokemonConquest'', several of the post-game scenarios use a "beauty contest" plot that's limited to female Warriors... [[MyFriendsAndZoidberg and Ranmaru]], because he's [[DudeLooksLikeALady easily mistaken for female]].
* In ''[[VideoGame/ShadowrunReturns Shadowrun: Dragonfall]]'', [[TeamDad Dietrich]] can easily become this if you're playing a female decker, as doing so renders the other male party member, Blitz, both redundant and optional.
* In ''VideoGame/MassEffect1'' it is entirely possible to make Kaiden the only male squadmate, if you make Shepard female and don't recruit Garrus and Wrex, and if [[spoiler:Kaiden is left to die]] afterwards on Virmire then Joker becomes the only important male character on the Normandy. Not possible with later ''Franchise/MassEffect'' games, what with the LoadsAndLoadsOfCharacters.
[[/folder]]

[[folder:Web Comics]]
* Zaebos from ''Webcomic/{{Earthsong}}''.
* Nenshe from ''Webcomic/RumorsOfWar'' qualifies in the absence of Obadai, as [[GenreSavvy the latter has yet]] [[MentorOccupationalHazard to actively participate]] in the story.
* When ''Webcomic/ElectricWonderland'' began, the roster of main characters consisted of three women and one male: NJ. Two more males, Torro and Parker, joined in the second comic, but Parker got swiftly PutOnABus. Also, Torro rarely contributes anything worthwhile to the characters' adventures, for being TooDumbToLive. This results in NJ still holding this title most of the time.
[[/folder]]

[[folder:Web Original]]
* Literature/WhateleyUniverse has Lancer, the only guy in Team Kimba, however there are plenty of recurring male characters outside Team Kimba. Phase is another guy on Team Kimba, but most people wouldn't know that looking at him, due to his mutation turning him into an intersexed hot chick physically. He gets almost as much pronoun confusion as the J-Team out of it.
* ''Franchise/{{Noob}}'' shows the GirlShowGhetto TV channel for which Omega Zell works in real life to have ''many'' female employees in the comic and has him complain about being surrounded by many women at work in the webseries. The novel reveals he really is the only male employee of the place (long story short, the boss thought his real life GenderBlenderName would somehow make him fit in perfectly).
* ''Chain of Hearts'' had a storyline, "The Watchers", where The title organization has about nine members, and only one of them is male. He's the second-in-command, and is often teased by the female members for being the only guy. But this is probably the author's subversion and attempted attack on TheSmurfettePrinciple. It seems to go against the themes of previous arcs, but "The Watcher" arc is written by a different author (the other arcs alternate between three other guys). Oddly, the author behind "The Watcher" arc has a tendency to make fun of the other three authors by writing characters that are presented as male at first, but turn out later to be female...
[[/folder]]

[[folder:Western Animation]]
* Caleb of ''WesternAnimation/{{WITCH}}'': The SixthRanger, BadassNormal love interest for Cornelia [[spoiler: and in the comics, for Queen Elyon]].
* ''WesternAnimation/SheRaPrincessOfPower'' featured ArcherArchetype and MasterOfIllusion Bow. Bow is one of the only ''recurring'' non-villain male character, besides He-Man's frequent cameos. The vast majority of enslaved townspeople the Rebellion rescues are male. The Sea Hawk and his crew. And there's Kowl and Light Hope; none of them human and none of them even remotely likely to be LoveInterest to ''anyone,'' but both of them male and both of them major enough characters to be explicitly mentioned in the opening.
* ''WesternAnimation/MyLittlePonyAndFriends'' has Spike, at least until Danny comes along.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' has Spike again, although in Season 2 Big Macintosh was [[AscendedExtra promoted]] to share this slot with Spike, usually trading off. If one is missing, chances are the other one is hanging around.
* Huckleberry Pie from ''WesternAnimation/StrawberryShortcake''.
* Rick in ''Toys/PollyPocket'' is the only boy among Polly's closest friends.
* Tuck is the only male member of the ''WesternAnimation/WonderPets''.
* In ''WesternAnimation/PoundPuppies2010'', Patches is the only boy in the Super Secret Pup Squad, which he is TheLeader of.
* ''WesternAnimation/TotalDrama World Tour'' has Team Amazon, which is made up of four girls, plus [[CasanovaWannabe Cody]] (who would probably love this arrangement if one of those girls wasn't [[StalkerWithACrush Sierra]]). The season also includes a team following TheSmurfettePrinciple and a GenderEqualEnsemble.
* The basic premise for ''WesternAnimation/TheLoudHouse'' follows Lincoln, a boy who lives in a large house with ten sisters.
* ''WesternAnimation/StevenUniverse'' is about a boy whose MissingMom was a MagicalGirlWarrior and, having inherited her powers, lives and trains with her former teammates, the Crystal Gems. The Gems are also part of a OneGenderRace with NoBiologicalSex, meaning that [[HalfHumanHybrid Steven]] also fulfills this trope for a whole ''species.''
[[/folder]]
----