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* ''Manga/JoJosBizarreAdventure'':
** In ''Manga/GoldenWind'', the Boss of Passione is a man who goes to great lengths to hide his identity, so obviously he's a Walking Spoiler. His name (Diavolo) and face are unknown until near the end. Another twist is that he has a SplitPersonality in Doppio, his {{Cloudcuckoolander}} right-hand-man.
** Polnareff isn't a Walking Spoiler in ''Manga/StardustCrusaders'' as he is introduced early on and becomes an important ally. But he DOES become one in ''Golden Wind'', where his appearance at the story's climax, as the third-party who helps the heroes figure out The Boss's identity as well as the key to defeating him, is presented as a huge twist.
** In the final chapter of ''Manga/StoneOcean'', we are introduced to two characters, Irene and Anakiss. Who are they? Why, none other than Jolyne and Anasui's replacements after Pucci succeeds in killing them and resetting the whole universe. Good luck saying anything about them without spoiling the part's ending.
** The final opponent of ''Manga/SteelBallRun'' is not president Funny Valentine, the BigBad of the story, but rather a copy of Diego Brando the president had summoned from another world. One who can use [[TimeStandsStill THE WORLD]] as its Stand. Seeing Dio Brando's iconic Stand ability make a return in the hands of a new character is a truly shocking surprise.
** ''Manga/JoJoLion'' has Josefumi Kujo, who is impossible to talk about without spoiling one of the key mysteries about Josuke's MysteriousPast: Josuke is the result of a FusionDance between Josefumi and Yoshikage Kira.
** In ''Manga/GoldenWind'', the Boss of Passione is a man who goes to great lengths to hide his identity, so obviously he's a Walking Spoiler. His name (Diavolo) and face are unknown until near the end. Another twist is that he has a SplitPersonality in Doppio, his {{Cloudcuckoolander}} right-hand-man.
** Polnareff isn't a Walking Spoiler in ''Manga/StardustCrusaders'' as he is introduced early on and becomes an important ally. But he DOES become one in ''Golden Wind'', where his appearance at the story's climax, as the third-party who helps the heroes figure out The Boss's identity as well as the key to defeating him, is presented as a huge twist.
** In the final chapter of ''Manga/StoneOcean'', we are introduced to two characters, Irene and Anakiss. Who are they? Why, none other than Jolyne and Anasui's replacements after Pucci succeeds in killing them and resetting the whole universe. Good luck saying anything about them without spoiling the part's ending.
** The final opponent of ''Manga/SteelBallRun'' is not president Funny Valentine, the BigBad of the story, but rather a copy of Diego Brando the president had summoned from another world. One who can use [[TimeStandsStill THE WORLD]] as its Stand. Seeing Dio Brando's iconic Stand ability make a return in the hands of a new character is a truly shocking surprise.
** ''Manga/JoJoLion'' has Josefumi Kujo, who is impossible to talk about without spoiling one of the key mysteries about Josuke's MysteriousPast: Josuke is the result of a FusionDance between Josefumi and Yoshikage Kira.
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** Likewise, it's near-impossible to talk of Lelouch's half-sister [[PoliticallyActivePrincess Euph]][[AllLovingHero emia]] without mentioning her tragic end near the close of R1.
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* ''Manga/DNA2''
** Mori gets mentioned by name a few times, but nothing beyond that can be listed without revealing that he's TheChessmaster to have orchestrated majority of the plot. And that he plans to use mind-controlled PSI Soldiers to stage a world war to fix the future's overpopulation problem by eradicating those that he deems worthless.
** Jun Momonari has a much smaller role and doesn't even get a full facial reveal, but just his name is already an indicator that he is related to the protagonist Junta.
** Mori gets mentioned by name a few times, but nothing beyond that can be listed without revealing that he's TheChessmaster to have orchestrated majority of the plot. And that he plans to use mind-controlled PSI Soldiers to stage a world war to fix the future's overpopulation problem by eradicating those that he deems worthless.
** Jun Momonari has a much smaller role and doesn't even get a full facial reveal, but just his name is already an indicator that he is related to the protagonist Junta.
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* ''Manga/ThePromisedNeverland'': Peter Latley. You can't really talk about him without mentioning that he's William Minerva's brother, that the Latley family serves as ambassadors between the demon and human worlds, that he's got an experimental farm going with one of the main characters as a test subject...
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* ''Manga/ThePromisedNeverland'': Peter Latley. Ratri. You can't really talk about him without mentioning that he's William Minerva's brother, that the Latley Ratri family serves as ambassadors between the demon and human worlds, that he's got an experimental farm going with one of the main characters as a test subject...
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* ''LightNovel/GoblinSlayer'': It's hard to talk about the Goblin ''{{Paladin}}'' without revealing a horrific revelation in Volume 5.
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** Koume Akeboshi, the girl Miho saved from drowning in the last tournament, and resulted in Black Forest's defeat. Her only scene involves her talking about that plot point and [[HeartwarmingMoments thanking Miho for saving her]]. Her name is essentially the only thing you can mention without spoiling it, albeit in large part because it's found in supplemental materials.
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** Koume Akeboshi, the girl Miho saved from drowning in the last tournament, and resulted in Black Forest's defeat. Her only scene involves her talking about that plot point and [[HeartwarmingMoments [[SugarWiki/HeartwarmingMoments thanking Miho for saving her]]. Her name is essentially the only thing you can mention without spoiling it, albeit in large part because it's found in supplemental materials.
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** The Young Conductor seems to die early on, but actually is Claire Stanfield, an amazing assassin, TheAce and ({{Ax|Crazy}}-) CrazyAwesome SociopathicHero. Hence he actually lived and becomes integral to the plot as The Rail Tracer, an urban legend that he created.
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** The Young Conductor seems to die early on, but actually is Claire Stanfield, an amazing assassin, TheAce and ({{Ax|Crazy}}-) CrazyAwesome AxCrazy SociopathicHero. Hence he actually lived and becomes integral to the plot as The Rail Tracer, an urban legend that he created.
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Some minor fixes
** It's nigh impossible to talk about [[GreaterScopeVillain Imu]] without revealing that there is actually a higher power than the Five Elders, and that the World Government was actually founded on BlatantLies.
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** Kyubey is probably the biggest example aside from Homura. Although they appear to be a cute MentorMascot, they are a [[ManipulativeBastard manipulative]] alien HiveMind that serves as the true BigBad. Everything about them, from thier motives to thier influence, is a twist. That being said, thier true nature [[ItWasHisSled is likely the first thing you heard about them]].
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** Kyubey is probably the biggest example aside from Homura. Although they appear to be a cute MentorMascot, they are a [[ManipulativeBastard manipulative]] alien HiveMind that serves as the true BigBad. Everything about them, from thier motives to thier influence, is a twist. That being said, thier their true nature [[ItWasHisSled is likely the first thing you heard about them]].
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Fixed a typo
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* ''Anime/LegendOfGalacticHeroes'': It's ''really'' hard to discuss the series without giving away the fact that Sigfried Kircheis, one of Reinhard von Lohengramm's most loyal and competent subordinates and the closest person he has to a true friend, dies about a quarter of the way through the series while shielding Reinhard from an assassination attempt. Even long after the fact, Kircheis's PresentAbsence makes itself felt throughout the rest of the series.
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* ''Anime/LegendOfGalacticHeroes'': It's ''really'' hard to discuss the series without giving away the fact that Sigfried Siegfried Kircheis, one of Reinhard von Lohengramm's most loyal and competent subordinates and the closest person he has to a true friend, dies about a quarter of the way through the series while shielding Reinhard from an assassination attempt. Even long after the fact, Kircheis's PresentAbsence makes itself felt throughout the rest of the series.
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* ''Anime/YuGiOhArcV'' has three characters, Leo Akaba, Zarc and Ray. Leo reveals the interdimensional war that takes center stage for the show and his backstory changes the context of the war as well as answers questions that have been around since the end of season 1. Zarc and Ray's very existence more or less spoil the entire MythArc of the show.
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Vivi's family are NOT considered World Nobles, even technically. They forsook their title when the king at the time refused to leave Alabasta. They are NOT World Nobles, even technically; the word implies they hold as much sway as World Nobles, which they don't.
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** Discussing Vivi typically reveals that she's undercover in Baroque Works as Ms. Wednesday, and with later developments that she's technically a World Noble.
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** Discussing Vivi typically reveals that she's undercover in Baroque Works as Ms. Wednesday, and with later developments that she's technically a her family is the only one among the World Noble.Government that didn't become World Nobles.
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Shoehorning.
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** Aizen was a gentle, beloved captain who was killed off early in the Soul Society arc before being revealed at the end of it as the very much alive BigBad. The reveal turned him into this trope for a while until ItWasHisSled kicked in.
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* The anime adaptation of ''VideoGame/TheCaligulaEffect'' has Shingo Tachibana, the person who Ritsu based his appearance in Mobius off of. He doesn't appear until the very end of Episode 10 (at which point the audience is led to believe he's still Ritsu) and his relationship with Ritsu, as well as both of their involvement in the overall plot, isn't explained until Episode 11 (the penultimate episode).
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** ''Anime/DragonBallSuper'' has an odd case: Jaco is a relatively minor character in the show proper. but the fact that he's in the ''Dragon Ball'' universe at all spoils that [[Manga/JacoTheGalacticPatrolman his own manga]] is a StealthPrequel.
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* ''Manga/BloomIntoYou'' has Mio Nanami, Touko's deceased older sister. Her very existence reveals an important but not immediately obvious aspect of Touko's character- that her self-esteem is so poor that she seeks validation by attempting to "become" her sister. She also turns out to have been a very different person than Touko initially believed, which shakes Touko to the core.
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** White Cosmos, the White King. She turns out to be Kuroyukihime's parent and older sister, who manipulated Kuroyukihime into killing Red Rider.
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* ''Manga/ThePromisedNeverland'': Peter Latley. You can't really talk about him without mentioning that he's William Minerva's brother, that the Latley family serves as ambassadors between the demon and human worlds, that he's got an experimental farm going with one of the main characters as a test subject...
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** And for the shippers, Himawari, whose mere existence makes ''her surname'' a spoiler. Her appearance alone[[note]]She has Naruto's "whisker" marks on her face, and her hair is the same color and style as Hinata's pre-timeskip hair[[/note]] should tell you who her parents are.
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** And for the shippers, Himawari, whose mere existence makes ''her surname'' a spoiler. Her appearance alone[[note]]She has Naruto's blue eyes and his' "whisker" marks on her face, and her hair is the same color and style as Hinata's pre-timeskip hair[[/note]] should tell you who her parents are.
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** Anything related to the histories of the Empire of Eldia and the Kingdom of Marley, as well as any information regarding the Island of Paradis spoils one of the largest twists in the series- contrary to what the viewers thought for over 80 chapters, there is human civilization outside the walls.
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** Anything related to the histories of the Empire of Eldia and the Kingdom of Marley, as well as any information regarding the Island of Paradis Paradis, the first and third ones contain massive revelations about the history of the world, the origins of the Titans and the main setting, the second spoils one the biggest PlotTwist of the largest twists in the series- series - contrary to what the viewers thought for over 80 chapters, there is ''is'' human civilization outside the walls.
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** Kyubey is probably the biggest example aside from Homura. Although they appear to be a cute MentorMascot, they are a [[ManipulativeBastard manipulative]] alien HiveMind that serves as the true BigBad. Everything about them, from thier motives to thier influence, is a twist. That being said, thier true nature [[ItWasHisSled is likely the first thing you heard about them]].
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** Utsuro for that matter. His voice actor alone should somewhat tip off who he really is.
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** Anything related to the histories of the Empire of Eldia and the Kingdom of Marley, as well as any information regarding the Island of Paradis spoils one of the largest twists in the series- contrary to what the viewers thought for over 80 chapters, there is human civilization outside th walls.
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** Anything related to the histories of the Empire of Eldia and the Kingdom of Marley, as well as any information regarding the Island of Paradis spoils one of the largest twists in the series- contrary to what the viewers thought for over 80 chapters, there is human civilization outside th the walls.
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* ''Manga/{{Gintama}}'': The only thing you can mention about [[PosthumousCharacter Yoshida Shouyou]] without spoiling anything important is that he was Gintoki, Katsura and Takasugi's childhood teacher. Anything else consists of his death being Takasugi's StartOfDarkness, that it was ''Gintoki'' who killed him and that he's ''-gasp-'' NotQuiteDead.
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* ''Manga/{{Gintama}}'': The only thing you can mention about [[PosthumousCharacter Yoshida Shouyou]] without spoiling anything important is that he was Gintoki, Katsura and Takasugi's childhood teacher. teacher (and that alone is already a bit spoiler-y). Anything else consists of his death being Takasugi's StartOfDarkness, that it was ''Gintoki'' who killed him and that he's ''-gasp-'' NotQuiteDead.NotQuiteDead, ''among other even more spoileriffic things''.
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* ''LightNovel/AccelWorld'': Takumu "Taku" Mayuzumi. You can't say much about him apart from his status as Haru and Chiyu's ChildhoodFriend without spoiling that 1)He, not Chiyu, is Cyan Pile, and thus the main antagonist of the first story arc. 2)The less pleasant aspects of his personality (e.g. secretly hating Haru and giving his girlfriend a backdoor program to spy on her). 3)The fact that after the arc, he remains on Brain Burst and changes for the better.
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* ''LightNovel/AccelWorld'': ''LightNovel/AccelWorld'':
** Takumu "Taku" Mayuzumi. You can't say much about him apart from his status as Haru and Chiyu's ChildhoodFriend without spoiling that 1)He, not Chiyu, is Cyan Pile, and thus the main antagonist of the first story arc. 2)The less pleasant aspects of his personality (e.g. secretly hating Haru and giving his girlfriend a backdoor program to spy on her). 3)The fact that after the arc, he remains on Brain Burst and changes for thebetter.better.
** Saffron Blossom and Chrome Falcon are difficult to talk about without revealing the former's death and the latter's becoming the first Chrome Disaster.
** Takumu "Taku" Mayuzumi. You can't say much about him apart from his status as Haru and Chiyu's ChildhoodFriend without spoiling that 1)He, not Chiyu, is Cyan Pile, and thus the main antagonist of the first story arc. 2)The less pleasant aspects of his personality (e.g. secretly hating Haru and giving his girlfriend a backdoor program to spy on her). 3)The fact that after the arc, he remains on Brain Burst and changes for the
** Saffron Blossom and Chrome Falcon are difficult to talk about without revealing the former's death and the latter's becoming the first Chrome Disaster.
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** Anything related to the histories of the Empire of Eldia and the Kingdom of Marley, as well as any information regarding the Island of Paradis.
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** Anything related to the histories of the Empire of Eldia and the Kingdom of Marley, as well as any information regarding the Island of Paradis.Paradis spoils one of the largest twists in the series- contrary to what the viewers thought for over 80 chapters, there is human civilization outside th walls.
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** Showing a single image of Gray after the second TimeSkip is almost certain to be a giveaway of his FaceHeelTurn.
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** Showing a single image of Gray after the second TimeSkip is almost certain to be a giveaway of his FaceHeelTurn.(faked) FaceHeelTurn.
** Anna Heartfilia is difficult to talk about without revealing her role in Zeref's ultimate plan or that she traveled from 400 years in the past to the present, and plays a role in the FinalBattle.
** Anna Heartfilia is difficult to talk about without revealing her role in Zeref's ultimate plan or that she traveled from 400 years in the past to the present, and plays a role in the FinalBattle.
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** And for the shippers, Himawari, whose mere existence makes ''her surname'' a spoiler. Her appearance alone should tell you who her parents are.
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** And for the shippers, Himawari, whose mere existence makes ''her surname'' a spoiler. Her appearance alone alone[[note]]She has Naruto's "whisker" marks on her face, and her hair is the same color and style as Hinata's pre-timeskip hair[[/note]] should tell you who her parents are.
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* ''Manga/{{Gintama}}'': The only thing you can mention about [[PosthumousCharacter Yoshida Shouyou]] without spoiling anything important is that he was Gintoki, Katsura and Takasugi's childhood teacher. Anything else consists of his death being Takasugi's StartOfDarknes, that it was ''Gintoki'' who killed him and that he's ''-gasp-'' NotQuiteDead.
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* ''Manga/{{Gintama}}'': The only thing you can mention about [[PosthumousCharacter Yoshida Shouyou]] without spoiling anything important is that he was Gintoki, Katsura and Takasugi's childhood teacher. Anything else consists of his death being Takasugi's StartOfDarknes, StartOfDarkness, that it was ''Gintoki'' who killed him and that he's ''-gasp-'' NotQuiteDead.
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* ''Manga/{{Gintama}}'': The only thing you can mention about [[PosthumousCharacter Yoshida Shouyou]] without spoiling anything important is that he was Gintoki, Katsura and Takasugi's childhood teacher. Anything else consists of his death being Takasugi's StartOfDarkness and that he's ''-gasp-'' NotQuiteDead.
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* ''Manga/{{Gintama}}'': The only thing you can mention about [[PosthumousCharacter Yoshida Shouyou]] without spoiling anything important is that he was Gintoki, Katsura and Takasugi's childhood teacher. Anything else consists of his death being Takasugi's StartOfDarkness StartOfDarknes, that it was ''Gintoki'' who killed him and that he's ''-gasp-'' NotQuiteDead.
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* ''Manga/{{Gintama}}'': The only thing you can mention about [[PosthumousCharacter Yoshida Shouyou]] without spoiling anything important is that he was Gintoki, Katsura and Takasugi's childhood teacher. Anything else consists of his death being Takasugi's StartOfDarkness amd that he's ''-gasp-'' NotQuiteDead.
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* ''Manga/{{Gintama}}'': The only thing you can mention about [[PosthumousCharacter Yoshida Shouyou]] without spoiling anything important is that he was Gintoki, Katsura and Takasugi's childhood teacher. Anything else consists of his death being Takasugi's StartOfDarkness amd and that he's ''-gasp-'' NotQuiteDead.
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* ''Manga/{{Gintama}}'': The only thing you can mention about [[PosthumousCharacter Yoshida Shouyou]] without spoiling anything important is that he was Gintoki, Katsura and Takasugi's childhood teacher. Anything else consists of his death being Takasugi's StartOfDarkness amd that he's ''-gasp-'' NotQuitedDead.
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* ''Manga/{{Gintama}}'': The only thing you can mention about [[PosthumousCharacter Yoshida Shouyou]] without spoiling anything important is that he was Gintoki, Katsura and Takasugi's childhood teacher. Anything else consists of his death being Takasugi's StartOfDarkness amd that he's ''-gasp-'' NotQuitedDead.NotQuiteDead.
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* ''Manga/{{Gintama}}'': The only thing you can mention about [[PosthumousCharacter Yoshida Shouyou]] without spoiling anything important is that he was Gintoki, Katsura and Takasugi's childhood teacher. Anything else consists of his death being Takasugi's StartOfDarkness amd that he's ''-gasp-'' NotQuitedDead.
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* ''Manga/TwentiethCenturyBoys'' has two examples, both of the Friends: Fukubei, a mostly unremarkable character whose only trope-worthy characteristics come after he's revealed as the BigBad, and Katsumata, whose mere existence is a major plot reveal at the end of the story.
* ''LightNovel/AccelWorld'': Takumu "Taku" Mayuzumi. You can't say much about him apart from his status as Haru and Chiyu's ChildhoodFriend without spoiling that 1)He, not Chiyu, is Cyan Pile, and thus the main antagonist of the first story arc. 2)The less pleasant aspects of his personality (e.g. secretly hating Haru and giving his girlfriend a backdoor program to spy on her). 3)The fact that after the arc, he remains on Brain Burst and changes for the better.
* ''VisualNovel/{{Air}}'': It's near impossible to talk about Misuzu without spoiling anything, especially [[ItWasHisSled her death at the very end]].
* ''VideoGame/{{Amagami}}'': Risa Kamizaki and Mika Makihara both are responsible for the rejection that figures largely into Junichi's backstory. The former tricks the latter thus causing Junichi to think he was StoodUp.
* ''Manga/AssassinationClassroom'':
** Kaede Kayano. Literally every single piece of information related to her, including her name, has to be revaluated after the revelations pertaining to her occur.
** Aguri Yukimura. The series is very careful to not reveal that she, the women shown several times in Koro Sensei's past and the former teacher of Class-E are same person and knowing her relationship with Koro Sensei (or rather his prior identity as the God of Death, which is also a ''humongous'' spoiler) completely changes ones perception of Koro Sensei and his motivations.
* ''Manga/AttackOnTitan''
** The existence of the Titan Shifters, humans with a LovecraftianSuperpower that allows them to create and pilot a Titan form. As a result, there's quite a few characters ([[HunterOfHisOwnKind Eren]], [[TheMole Annie, Reiner, Bertolt]], and [[WildCard Ymir]]) with entries that are largely spoilers. ''Especially'' Eren, as the last time we saw him before he shows off his Titan Shifting powers, he was eaten by a Titan and was made to look like the DecoyProtagonist.
** The [[ManiacMonkeys Beast Titan]], a strange ape-like Titan of incredible intelligence that can speak human language fluently and command other Titans. It is all but explicitly stated to have transformed the missing residents of Connie's village into Titans.
** The [[SealedBadassInACan Colossal Titans]] entombed within the Walls, which appear to provide the foundations.
** Anything related to the histories of the Empire of Eldia and the Kingdom of Marley, as well as any information regarding the Island of Paradis.
* ''LightNovel/{{Baccano}}''
** The Young Conductor seems to die early on, but actually is Claire Stanfield, an amazing assassin, TheAce and ({{Ax|Crazy}}-) CrazyAwesome SociopathicHero. Hence he actually lived and becomes integral to the plot as The Rail Tracer, an urban legend that he created.
** Ronnie Schiatto, a seeming background character who turns out to be [[AllPowerfulBystander the omniscient, reality-warping "demon"]] summoned aboard the ''Advena Avis'' in 1711. Elmer asked him to stick by Maiza as a human and the demon, being as extremely bored as [[PrescienceIsPredictable most omniscient, all-powerful beings would likely be]], [[ItAmusedMe decided it'd be a decent change of pace.]]
** In the anime and earlier novels, Fermet was a fairly minor character who was thought to have been killed years before the story began. Then comes Blood Sabbath with the revelation that he isn't dead and never has been, and is in fact the BigBad of the series, having masterminded the events of the 2002 arc and caused Huey's StartOfDarkness back in the 1700s. These [[TheReveal reveals]] make pretty much everything outside of his [[AbusiveParents role in Czes's backstory]] hard to talk about.
* ''Manga/{{Bakuman}}'': Nanamine initially presents himself as a cheerful and energetic, if somewhat naive, young mangaka. Within a few chapters, you realize that he's actually a devious schemer who intends to subvert the editorial process and climb to the top of the manga world with online helpers, and it's difficult to talk about him without mentioning this. On a lesser scale, Iwase only makes a few appearances before returning to the story as a rival mangaka.
* ''Manga/{{Berserk}}'': The Idea of Evil, to the point the author originally omitted the original scene because he felt it was too much of a spoiler at too early a time.
* ''Manga/{{Bleach}}''
** Aizen was a gentle, beloved captain who was killed off early in the Soul Society arc before being revealed at the end of it as the very much alive BigBad. The reveal turned him into this trope for a while until ItWasHisSled kicked in.
** Royd Lloyd's existence is kept a secret until it is revealed that he was posing as [[BigBad Yhwach]] while fighting Yamamoto, and it's impossible to mention any of Royd's actions without spoiling that Yhwach was not the one who fought against and lost to Yamamoto. Even his name is a spoiler.
** Kanae Katagiri is Uryuu's MissingMom, but she isn't revealed until the final arc because her story is the key to the resolution of the plot; it connects Ryuuken's refusal to be a Quincy with the following: his estrangement from Uryuu, Masaki's death, Ichigo's origins and, above all, it contains the secret that leads to the defeat of Yhwach.
** Merely the name Yachiru Unohana is this, since while it had been established some time before that Kenpachi Zaraki had named the little girl he adopted after someone important to him, finding out just ''who'' this person really is does a complete 180 on the previous characterization of Captain Retsu Unohana, who before had been portrayed as the kindly TeamMom of the Gotei 13 ([[BewareTheNiceOnes although people are afraid to get on her bad side]]) but is in fact the previous Kenpachi and an AxCrazy former criminal.
* ''Anime/BloodPlus'': Diva is [[CainAndAbel Saya's twin sister]] and the series' BigBad. She also does not make an on-screen appearance until the end of Episode 23, and her identity is not fully revealed until Episode 24. This pretty much makes her name the only thing you can mention about her without spoiling the entire first half of the series.
* ''Anime/BodaciousSpacePirates'': Ironbeard, captain of the Parabellum, during the last arc of the anime. He turns out to be [[LukeIAmYourFather Marika's father]], who was stated to have died at the beginning of the anime and the reason Marika had to become captain of the Bentemaru in the first place.
* ''Manga/{{Bokurano}}''
** Youko Machi, since she's from another Earth, is Koyemshi's sister (which in turn reveals that he used to be human), and planned for the kids to get involved in the game from the very beginning. It's difficult to talk about her without mentioning any of this.
** Junji "Katari" Karita appears in one scene, falsely claims to be a Zearth pilot (thus [[SpannerInTheWorks derailing the plan to go public about Zearth]]) and is killed shortly thereafter. Essentially, his name and gender are all you can reveal without spoiling this.
* ''Anime/CasshernSins'': Luna.
* ''VisualNovel/{{CLANNAD}}'': Ushio Okazaki. Her existence as [[IllGirl Nagisa]] and [[TheHero Tomoya's]] daughter doesn't spoil the fact that the two of them ultimately get together, [[SupportingHarem as it's made more than clear from the beginning that Nagisa is the main girl]], but the fact that she's an actual character in her own right ''does'' spoil the fact that the anime continues on after they graduate to follow their married life. Her backstory also spoils [[ItWasHisSled the relatively well-known fact]] that Nagisa dies in childbirth.
* ''Anime/CodeGeass'': Lelouch's supposed-to-be-dead mother Marianne (whose spirit has been hiding in Anya).
* ''Anime/ConcreteRevolutioChoujinGensou'':
** Once a certain group photo starts getting passed around, prepare for the inevitable spoilers that the brunette on the left of it is Jin Nakagawa, who not only is Jirou's childhood friend but is Sword Phantom Claude. Nakagawa also helps Kikko out with suppression of her dark side, spoiling the fact that Kikko is in need of a husband so she can be a devil queen.
** When an evil Hyouma shows up, it spoils the fact Hyouma is a time traveller who tries to change the past.
* ''Manga/DailyLivesOfHighSchoolBoys'': Habara may look utter unremarkable (she's the DistaffCounterpart of the local RidiculouslyAverageGuy Tadakuni), but she has very significant {{backstory}} which cause most tropes under her--as well as her RedBaron during the time--to be spoilered.
* ''Anime/DanganRonpa3'':
** Miaya is hard to talk without revealing that Monaca [[KillAndReplace killed and replaced her]] and came into the game as a robotic avatar of her. Monaca is also this as well since she was [[NotMeThisTime not the mastermind of the final killing game]].
** As for Tengan aka the actual BigBad of the anime, one can only expect him to be this.
** The fact that Chisa is a Remnant of Despair throws her characterization into a loop.
** Ryota was originally a downplayed version of this trope since his role was changed when the fans learn that Enoshima used his anime to get the Remnants of Despair on her side. Then, there's his role in Side: Hope...
* ''Manga/DeathNote'': Mello and Near; the fact they're [[HeroAntagonist L's]] successors (coupled with L's utter refusal to give up on the Kira case) are an easy tip-off to the fact that L dies.
* ''Manga/DetectiveConan'': In episode 11, Narumi Asai, the kindly and seemingly innocuous female doctor who helped out Conan, Kogoro and Ran during their stay in Tsukikage Island turned out to be a man who cross-dressed as a disguise to enable him to investigate the suspicious death of his father and plot his revenge against the culprits. He was also notable to be the only murderer of the week who was DrivenToSuicide after Conan exposed him, contributing greatly to his CharacterDevelopment and he would later consider his failure to prevent Asai from committing suicide as [[MyGreatestFailure his greatest blunder]].
* ''Anime/DragonBallZ'': Raditz, being Goku's brother who reveals that they're both from a race of alien conquerors.
* The ''Franchise/EvilliousChronicles'' is absolutely '''full''' of them.
** Ney Futipe, a seemingly minor character in ''LightNovel/ClotureOfYellow'' until she's revealed at the end to be TheMole. Then comes the later revelations that she's the illegitimate child of Prim and Arth, as well as one of the incarnations of Gretel.
** Just stating the name Cherubim Venomania gives away TheReveal in ''LightNovel/TheLunacyOfDukeVenomania'' pertaining to Steriasis's true identity.
** The Demon of Gluttony, mostly thanks to him being killed, absorbed and replaced by Banica Conchita at the end of ''LightNovel/EvilFoodEaterConchita'', who goes on to become Master Of The Graveyard and one of the franchises main villains.
** Sickle, who is the TopGod and BigGood. Knowing this radically rewrites what one knows about the origins of the series world, religion and Levia-Behemo.
** Eve Moonlit, the Original Sinner, who is revealed at the end of ''LightNovel/GiftFromThePrincessWhoBroughtSleep'' to be the true identity of the Demon of Sloth, as well as Mikulia Calaground, Platonic ''and'' Margarita Blankenheim.
** From the same novel there's also Mayrana Blossom, who's existence as Julia's body double isn't given until TheReveal.
** Irregular, who is revealed in ''Literature/SevenCrimesAndPunishments'' to, against all implication, ''not'' be the same individual as Allen. The same book also has Punishment, who's very existence isn't even hinted at until his brief appearance at the end.
** Seth Twiright, the researcher referenced multiple times in Original Sin Story, until there comes the big bombshell late into ''LightNovel/FifthPierrot'' that he's the Demon of Wrath.
* ''Manga/FairyTail''
** Zero is the GreaterScopeVillain of the Nirvana arc and the SuperPoweredEvilSide of Brain, the BigBad of the arc. Zero doesn't appear until all of the other members of the Oración Seis are defeated, and his existence has little {{Foreshadowing}}.
** Queen Chagot at first seems to be TheManBehindTheMan to King Faust, and is even regarded as a deity. But it turns out that Faust is acting on his own terms, and that Chagot is ''hardly'' a deity. She ultimately isn't as evil as initially assumed.
** Zeref. Even the fact that he's alive at all is a spoiler; this combined with him being [[{{Bishonen}} quite]] [[DeathSeeker diff]][[WoobieDestroyerOfWorlds erent]] then how he had been [[EvilSorcerer originally described]] makes it essentially impossible to mention him to someone who hasn't read up to the point where he appears without spoiling something. Even his last name spoils a major element in the series.
** Acnologia first appears out of nowhere at the end of the Sirius Island arc (same arc in which Zeref is revealed) to ''nuke the entire island'', leading to the members of Fairy Tail frozen in time for seven years. He then is revealed to be a dragonslayer turned Dragon and is the main reason they're not around anymore.
** Future Lucy and Future Rogue for mainly being from the BadFuture, and are not revealed until the end of the Grand Magic Games arc. Same thing with the seven dragons from the future that come back to present day.
** Silver from the Tartaros dark guild is revealed to be Gray's father and possessed by the demon Deliora. Except the second reveal isn't true, and he just wants Gray to kill him.
** The reason that E.N.D., [[TheGhost the guildmaster]] [[GreaterScopeVillain of Tartaros]], is only referred to by an acronym is because his full name is '''E'''therious '''N'''atsu '''D'''ragneel.
** Showing a single image of Gray after the second TimeSkip is almost certain to be a giveaway of his FaceHeelTurn.
* ''Literature/FromTheNewWorld'': the Fiend ("Akki") who is actually Mamoru and Maria's child who has been raised by the monster rats.
* ''Manga/FruitsBasket'': Akito Sohma - specifically, [[UnsettlingGenderReveal her gender]]. Many of her entries either blank out her name or [[PaperThinDisguise blank out her pronouns]], although it's also acceptable to simply call Akito a "he", considering that everyone in-story (including [[{{Bokukko}} Akito herself]]) refers to her as such until the tail end.
* ''Manga/FullmetalAlchemist''
** King Bradley is difficult to mention without revealing that he's secretly the Homunculus Wrath (Pride in [[Anime/FullmetalAlchemist the first anime]]).
** His "son", Selim Bradley/Pride even more-so. It's nicely handled on the character page by listing them as separate characters on separate pages, though Pride is pretty much an all-white entry as a result.
** Ling Yao and the second incarnation of the homunculus Greed are very difficult to discuss without revealing that they are (more-or-less) one and the same, due to the latter possessing the former's body.
** Everything about Father is a spoiler, including his appearance - which is identical to Hohenheim and thus reveals an important connection between them.
** The 2003 ''Anime/FullmetalAlchemist'' anime:
*** The BigBad Dante.
*** Lyra as well. She appeared early on and is a minor antagonist but appears again later on... Sort of.
* ''Anime/GaoGaiGar'': Pizza of the Four Machine Kings a.k.a. Soldato J-002, pilot of the Giant Mechanoid King J-Der.
* ''Anime/GirlsUndPanzer''
** The Maus, technically treated as a character like some of the other tanks, is a surprise Black Forest unleashes on Oarai, to devastating effect; it only appears at the end of the penultimate episode of the first series.
** Maho Nishizumi has a large number of tropes spoilered out, especially concerning that 1)she is defeated in the finals, 2)In ''Little Army'', she won by firing on an enemy flag tank that went to rescue one from her team, and 3)Contrary to her initial first impression as an AloofBigSister, she actually loves Miho dearly, and chooses to be Nishizumi heiress so that Miho will not have to.
** Koume Akeboshi, the girl Miho saved from drowning in the last tournament, and resulted in Black Forest's defeat. Her only scene involves her talking about that plot point and [[HeartwarmingMoments thanking Miho for saving her]]. Her name is essentially the only thing you can mention without spoiling it, albeit in large part because it's found in supplemental materials.
* ''Franchise/{{Gundam}}''
** ''Anime/MobileFighterGGundam'': The character page spoilers out every last entry (and the name) for Major Ulube Ishikawa, due to him being revealed as the BigBad about, oh, four episodes from the end. Specially since until then, he was seen as ''the'' ReasonableAuthorityFigure of the series.
** ''Anime/MobileSuitGundamSEED'': Rau Le Creuset, whose status as BigBad, OmnicidalManiac, and clone of Al La Flaga are revealed in the last five episodes of the show.
** ''Anime/MobileSuitGundamZZ'': Glemmy Toto, who is both TheStarscream and a clone of Gihren Zabi, facts that aren't outed until the end.
** ''Anime/MobileSuitGundam00'': Ribbons Almark, the real BigBad of the first season and of the entire series.
** ''Anime/GundamBuildFightersTry'': A mysterious girl sets off the events of the ''Island Wars'' OVA. Discussing anything more about her risks spoiling the fact that her parents are none other than [[Anime/GundamBuildFighters Reiji and Aila Jyrkiäinen]].
* ''Anime/IdolmasterXenoglossia'': Yukiho Hagiwara, who initially appears as a shy girl with a tendency to fall asleep at various moments, but in the ChristmasEpisode is revealed to be [[DragonInChief Chihaya Kisaragi's]] friend and a [[TheMole spy for Turiavita]], trying to help Chihaya get [[HumongousMecha Imber]] back from Haruka, and goes as far as to snatch Imber's key from Haruka in the next episode after revealing her true motives and take Chihaya's (who gets Imber) place as Nubilum's pilot.
* ''LightNovel/IsThisAZombie'': Describing tropes that apply to Kyoko is very difficult if you really want to avoid spoiling the fact that she's the serial killer who murdered Ayumu. Entire entries on most of the trope pages relevant to her are almost completely spoiler tagged.
* ''Anime/JewelpetTwinkle'': Alma, the main antagonist, is full of twists - even [[{{Bifauxnen}} her gender]] is one, but the biggest is that she's the heroine's crush's long lost twin sister.
* ''Anime/{{K}}'': Adolf K. Weismann seems at first to be [[FromASingleCell a huge]] [[MysteriousWatcher pileup of]] [[ManOfWealthAndTaste villain tropes]], down to the EvilLaugh and [[WhiteHairBlackHeart Sephiroth hair]]. Then it turns out he's actually ''TheHero'', memory-wiped ''and'' body-swapped. ...To be fair, he ''was'' possessed by the bad guy when he did the EvilLaugh, though.
* ''Franchise/KagerouProject'': There are plenty examples to be found, but probably the biggest is Kano, who's background and true motives are huge twists for later in the series.
* ''Anime/KillLaKill'':
** It gets hard to talk about the Life Fibers in the later half of the series without spoiling the fact that they're sentient aliens that had their hands in humanity's accelerated evolution. Consequently, any character that is related to them or has a hand in Ragyo's EvilPlan to bring the Life Fibers back to power is also spoileriffic.
** Ragyo herself qualifies, as she only makes sporadic appearances in the first half and her motives and character aren't established until later on.
** Nui is easily the big one however, since she appears close to halfway in to deliver an absolutely game changing revelation. This is without giving away the fact that she's an ArtificialHuman.
* ''Anime/LegendOfGalacticHeroes'': It's ''really'' hard to discuss the series without giving away the fact that Sigfried Kircheis, one of Reinhard von Lohengramm's most loyal and competent subordinates and the closest person he has to a true friend, dies about a quarter of the way through the series while shielding Reinhard from an assassination attempt. Even long after the fact, Kircheis's PresentAbsence makes itself felt throughout the rest of the series.
* ''Manga/LetterBee''
** Talking about Gauche Suede at virtually any point after the first chapter is likely to involve spoilers; after delivering Lag to Cambel Litmus, he was promoted to the head office, then lost much of his heart, disappeared and ended up with Reverse. Much of the early story involves Lag finding out what happened to him.
** "Roda", Noir's accomplice, who bears the name of Gauche's dingo. Discussing her inadvertently reveals Gauche's status as Noir.
** Jick Barrol, given his status as a major antagonist complicit in the Amberground government's misdeeds.
* ''Manga/{{Loveless}}'': Seimei Aoyagi has over half the tropes on his entry on the character paged blacked out after TheReveal that he's alive after having been assumed dead since the start of the story. The revelation that he's alive also completely turns his prior characterization as a loving older brother on its head.
* ''Franchise/LyricalNanoha''
** Alicia only gets mentioned with spoiler warnings since any discussion about her, from her role in the story, to her relationship with the characters, to her appearance, to her family name will reveal that [[EvilMatriarch Precia]] had another daughter before Fate... and that [[ReplacementGoldfish Fate was a failed attempt to revive her]].
** Rein a.k.a Reinforce Zwei. You know something must've happened to the first Reinforce when a character with the same name has the German word for two on her name.
* ''Anime/MagicKnightRayearth'': Princess Emeraude is revealed to be the BigBad, not the BigGood.
* ''Anime/MaiHime'': Shizuru initially seems like nothing more than the StudentCouncilPresident and a friend of Natsuki's who occasionally helps her out. Then, in the last few episodes, she's revealed as a Hime and kills quite a few people for Natsuki's sake, while revealing that she is ''in love with Natsuki.'' Most discussion of her character tends to focus on her actions toward the end.
* ''Anime/MaiOtome'':
** From the manga, there's Sergay Auguste Taiki, who, unlike his PunchClockVillain counterpart from the anime, has ''no'' redeeming qualities and turns out to be the BigBad.
** From anime and manga series, Lena Sayers. The spoiled twists are different for each adaptation, but one thing both versions of her have in common is that she's Arika's mother.
* ''Anime/MawaruPenguindrum'' has a whole lot of twists and pieces to be put together, so naturally there are a lot of characters with heavily spoilered pages. Yet somehow, in amongst characters whose very identity is a spoiler, Kanba seems to have it worst, despite being one of the leads. This is because a lot of what he does even very early on in the anime (before the audience understands, of course) relates back to one really big spoiler, which also happens to represent one of the most complex and centralised parts of the plot. Not only that, his entire backstory is a spoiler as well.
* ''Mazinger'':
** Most of spoilers in ''Anime/MazingerZ'' and ''Anime/GreatMazinger'' revolve around Kenzo Kabuto and Archduke Gorgon. The former one was thought being dead for a long while, but at the end of the series it was revealed he was alive. Oh, and he is {{The Hero}}'s father. He also is a major character of the sequel, where he gets KilledOffForReal, so it is pretty much impossible talking about him with spoiling key plot points of both series. Gorgon's first appearance revealed the supposedly extinct Mykene civilization still existed. At the beggining he seemed another ObviouslyEvil Hell's ally, but in reality he was a DragonWithAnAgenda was working for a GreaterScopeVillain as he plotted destroying both Dr. Hell and Mazinger-Z. He was successful on all accounts, so describe him means spoiling the end of the series.
** Maria Grace Fleed from ''Anime/UFORoboGrendizer'' is one of the cases where her mere name is already a spoiler. She is {{The Hero}}'s sister. However, Duke was supposed to be the only Fleedian survivor and have no family left. Maria is one of the main characters, and you can not describe her without spoiling both facts. Geez, stating her last name is a complete giveaway. And then you have Rubina. Who is she? BigBad King Vega's daughter and Duke Fleed's fiancée.
* ''Manga/MurasakiiroNoQualia'' has multiple characters that you can't really talk about without giving something away:
** Talking about Yukari, the purple-eyed deuteragonist, is practically impossible unless you mention that she dies after the first few chapters, and her death ends up creating the big plot and reason for the multiverse story to unfold, all in an effort to prevent her death.
** Talking about Hatou Manabe, the protagonist, is even worse, if possible. Try to describe Hatou to someone without mentioning that she ends up getting kidnapped by a serial killer, her arm being chopped off and reassembled by Yukari with the help of her cellphone. That said cellphone arm functioning as a proper cellphone and giving her the ability to talk to infinite parallel universe versions of herself that warn her of Yukari's death. That she can communicate with them and gain the knowledge and memories of her parallel universe-selves, can practically [[RealityWarper create a universe where magic exists]] that gives her magic abilities. And she recently obtained the realiziation that she could take over and "become" almost every person she wants to be. There's more, but... [[JustifiedTrope yeah]].
** Tenjou Nanami has it a bit easier. The only thing that is a spoiler to talk about with her is that she was Yukari's first "operation patient" and she had injuries that were "fixed" by Yukari with [[BodyHorror pieces of a jungle gym]].
* ''Manga/{{Naruto}}''
** [[KnightTemplar Danzo]], due to his involvement in the Uchiha Massacre, as well as several other characters' backstories.
** Madara Uchiha was this initially, since he was thought to be dead for a long time. Then it turns out that he ''was'' dead, and the guy who's been pretending to be him all this time is Obito Uchiha (who was not only thought to be dead, but was also formerly Kakashi's teammate). And now, Madara's other partner (Black) Zetsu forced the weakened Obito to revive him completely.
** Itachi - who was GoodAllAlong and whose death reveals ''many'' subsequent twists as a result. His brother Sasuke would've been one too, before his FaceHeelTurn became ItWasHisSled (hard to hide considering it drives the plot of ''Shippuden'' and Part II in the manga), plus Sasuke is pretty much the {{Deuteragonist}} of the story.
** Tobirama and Hashirama, after the revelation of their backstory, which basically put into motion a chain of events leading to the current timeline's ordeals.
** Kaguya Ĺtsutsuki, being the very first Chakra user and the ''mother'' of the Sage of Six Paths, dwarves every single other Walking Spoiler before her. This gets even worse once it is revealed that she is not a PosthumousCharacter and promptly proceeds to usurp ''Madara''[='=]s position as the BigBad.
** And for the shippers, Himawari, whose mere existence makes ''her surname'' a spoiler. Her appearance alone should tell you who her parents are.
* ''Anime/NeonGenesisEvangelion''
** Though it's entered ItWasHisSled territory now, most tropes about Yui Ikari and Unit 01, since the two are in fact one and the same, with Unit 01 containing Yui's soul. Yui's face is also considered a spoiler and is not revealed until late in the series because of her very close resemblance to Rei Ayanami, who is in fact a clone of Yui and a ReplacementGoldfish for her husband Gendo.
** Kaworu, not only for being the 17th Angel, but also because he doesn't appear until [[CerebusSyndrome everything has already gone to hell]].
** In the third film of the remake ''Anime/RebuildOfEvangelion'', it's impossible to talk about Sakura Suzuhara, Toji's little sister, appearance or role as a medical officer without spoiling the 14 years time skip.
* ''Manga/OnePiece''
** Just listing the main characters is a spoiler, as the series plays FiveManBand straight, deconstructs and slowly averts it. A special mention goes to two antagonists who make HeelFaceTurn and join Luffy's crew.
** Discussing Vivi typically reveals that she's undercover in Baroque Works as Ms. Wednesday, and with later developments that she's technically a World Noble.
** It's difficult to talk about the four Cipher Pol agents undercover in Water 7, especially not Kaku and Lucci, without revealing their being TheMole.
** Rouge -- knowing anything about her (especially her ''full name'') reveals that Luffy and Ace aren't even related.
** It's impossible not to mention Sabo, who is revealed to be their other [[BloodBrothers "brother"]]. Even if you don't mind ''that'' particular revelation, there's the teeny problem about him being alive in a certain WhamEpisode.
** Blackbeard shows up as a minor character, albeit one who shares an awful lot in common with Luffy and briefly shares the spotlight with him. While he does become important later on, this jolly man turns out to be Luffy's EvilCounterpart and a true [[TheChessmaster Chessmaster]], matching Luffy's crewmates one for one with darker counterparts and manipulating everyone around him, including many other important characters we saw before, in his attempt to gain power and find the One Piece.
** Poseidon: even being on a character page reveals that a WeaponOfMassDestruction is actually a PersonOfMassDestruction.
** Dragon the Revolutionary. His full name is one of the most tightly held secrets within the series.
* ''Manga/PandoraHearts'': Jack Vessalius (who's basically a Walking Spoiler folded into ''two'' Walking Spoilers, since everything we ''thought'' we learned about him is essentially turned inside out in the series's biggest WhamEpisode). There's also anything to do with Glen and his legacy, Lacie, and the majority of what ''[[UnreliableExpositor actually]]'' happened one hundred years ago. And since nearly ''every'' character ends up with some significant tie to that incident, even and ''especially'' the protagonist himself, the [[JigsawPuzzlePlot series as a whole]] can be considered its own Walking Spoiler.
* ''Anime/PantyAndStockingWithGarterbelt'': The Mayor. His full name, description and every trope except Walking Spoiler is whited out.
* ''Franchise/PrettyCure'': every SixthRanger is a LateArrivalSpoiler. However, TheDragon Regina from ''Anime/DokiDokiPrecure'', started out as a villain, got quickly befriended by Mana, then Regina went nuts, then she became normal again and joined the Pretty Cure for about two episodes, and then she's brainwashed by her [[BigBad father]]. She's PutOnABus for about 13 episodes, and when she's back, she gained the Miracle Dragon Glaive, one of the three legendary regalia. Regina is Mana's friend, but it's a spoiler that she's ''still'' a villain, while every DarkMagicalGirl who wasn't an EvilKnockoff joined the Pretty Cures. And it's also a spoiler that she's ''not'' Cure Ace.
* ''Anime/PuellaMagiMadokaMagica'' is nearly ''half'' {{Wham Episode}}s, making it near impossible to talk about without revealing ''something'', but some individuals are a cut above the rest.
** Mami Tomoe's death is her most important "action", and talking about her or the story as a whole without pointing out that a main character is mercilessly killed three episodes in is rather difficult. Then MemeticMutation turned her death into ItWasHisSled.
** Oktavia von Seckendorff, Sayaka's witch self, reveals that Magical Girls become witches as well as which character will be the first to do so on-screen.
** Homura's identity, motivation, relationship with Madoka, and even her powers are all huge spoilers. Goes double for the [[GirlishPigtails pigtailed]] [[{{Meganekko}} glasses-wearing]] version of Homura ("[[FanNickname Moemura]]"), who first appears when all this is revealed, and goes '''triple''' for her in ''[[Anime/PuellaMagiMadokaMagicaTheMovieRebellion Rebellion]]''.
** Madoka herself is not an example, but two of the forms she takes are: Kriemhild Gretchen, her witch form, and [[MessianicArchetype Ultimate Madoka]], the CosmicEntity she becomes in the final episode.
** Kyouko only shows up after things go to hell, with everything about her character being related to the darker elements that were only hinted at prior, and all her major contributions are being involved in spoilerific events.
** A bit of real life walking spoilers as well, the producers tried to keep the fact that Creator/GenUrobuchi wrote the script a secret from viewers due to how he automatically ups the tragedy quotient of anything he's involved with. When his involvement was leaked [[TrollingCreator he lied]] and said he wanted to write a heartwarming story for a change. When you consider how the story does end, it turns out the creators still got the last laugh overall.
* ''Manga/{{Saki}}'':
** The eponymous main character's older sister, Teru. When she is first mentioned, it's implied that she and Saki are not on good terms at the moment, but Saki has fond memories of her. When she first appears in the present, she's become cold, detached, and [[IHaveNoSon refuses to acknowledge being related to Saki]]. That latter part is an unpleasant surprise to Saki, and is somewhat surprising considering what we had heard of Teru.
** [[NoNameGiven A so far unnamed girl]] is shaping up to be this, given her appearance in a series of flashbacks that implies that 1)she's somehow related to Saki and Teru, and 2)whatever happened to her is related to the Miyanaga family falling apart.
* ''Manga/SakuraGari'': Sakurako Saiki. While she appears relatively early in the story, her ''actual'' role in it as well as her twisted motivations aren't revealed until almost the end. Same goes to the fact that ''he'' is a boy named Youya.
* ''Manga/SchoolLive'':
** It's hard to discuss the series, especially the manga as it is revealed under ten chapters in, without mentioning that Megu-nee is actually {{dead|all along}}.
** Ruu doesn't appear until after the girls leave the school. She's Rii's little sister who had never been referenced for. Even more of a spoiler is that Rii underwent a SanitySlippage and Ruu is actually [[ThroughTheEyesOfMadness a teddy bear]].
* ''LightNovel/SundayWithoutGod'': Hampnie Hambart, who at first appears to be a main character but then dies in episode three. As with Mami Tomoe listed above, his death is his most important "action," so it can be difficult to summarize the series as Ai's journey without revealing that Hampnie ''isn't'' one of her traveling companions. The roles of Alice and Dee, who appear halfway through the anime, can also be difficult to summarize without spoiling that they're trapped in a GroundhogDayLoop and that one of them may actually be dead.
* ''Anime/TengenToppaGurrenLagann''
** Nia Teppelin is the Spiral King's daughter, appears after Kamina's death, and is the Anti-Spiral messenger.
** The Anti-Spiral is the series true BigBad.
* ''Manga/TsubasaReservoirChronicle'': Any mention of the real Syaoran or real Sakura inherently spoils that the Syaoran and Sakura the series focuses on are clones.
* Raizen in ''Manga/YuYuHakusho''. Describing him in more than general terms reveals one of the biggest twists in the series, since he's [[HalfHumanHybrid Yusuke's demon ancestor]].
----
* ''LightNovel/AccelWorld'': Takumu "Taku" Mayuzumi. You can't say much about him apart from his status as Haru and Chiyu's ChildhoodFriend without spoiling that 1)He, not Chiyu, is Cyan Pile, and thus the main antagonist of the first story arc. 2)The less pleasant aspects of his personality (e.g. secretly hating Haru and giving his girlfriend a backdoor program to spy on her). 3)The fact that after the arc, he remains on Brain Burst and changes for the better.
* ''VisualNovel/{{Air}}'': It's near impossible to talk about Misuzu without spoiling anything, especially [[ItWasHisSled her death at the very end]].
* ''VideoGame/{{Amagami}}'': Risa Kamizaki and Mika Makihara both are responsible for the rejection that figures largely into Junichi's backstory. The former tricks the latter thus causing Junichi to think he was StoodUp.
* ''Manga/AssassinationClassroom'':
** Kaede Kayano. Literally every single piece of information related to her, including her name, has to be revaluated after the revelations pertaining to her occur.
** Aguri Yukimura. The series is very careful to not reveal that she, the women shown several times in Koro Sensei's past and the former teacher of Class-E are same person and knowing her relationship with Koro Sensei (or rather his prior identity as the God of Death, which is also a ''humongous'' spoiler) completely changes ones perception of Koro Sensei and his motivations.
* ''Manga/AttackOnTitan''
** The existence of the Titan Shifters, humans with a LovecraftianSuperpower that allows them to create and pilot a Titan form. As a result, there's quite a few characters ([[HunterOfHisOwnKind Eren]], [[TheMole Annie, Reiner, Bertolt]], and [[WildCard Ymir]]) with entries that are largely spoilers. ''Especially'' Eren, as the last time we saw him before he shows off his Titan Shifting powers, he was eaten by a Titan and was made to look like the DecoyProtagonist.
** The [[ManiacMonkeys Beast Titan]], a strange ape-like Titan of incredible intelligence that can speak human language fluently and command other Titans. It is all but explicitly stated to have transformed the missing residents of Connie's village into Titans.
** The [[SealedBadassInACan Colossal Titans]] entombed within the Walls, which appear to provide the foundations.
** Anything related to the histories of the Empire of Eldia and the Kingdom of Marley, as well as any information regarding the Island of Paradis.
* ''LightNovel/{{Baccano}}''
** The Young Conductor seems to die early on, but actually is Claire Stanfield, an amazing assassin, TheAce and ({{Ax|Crazy}}-) CrazyAwesome SociopathicHero. Hence he actually lived and becomes integral to the plot as The Rail Tracer, an urban legend that he created.
** Ronnie Schiatto, a seeming background character who turns out to be [[AllPowerfulBystander the omniscient, reality-warping "demon"]] summoned aboard the ''Advena Avis'' in 1711. Elmer asked him to stick by Maiza as a human and the demon, being as extremely bored as [[PrescienceIsPredictable most omniscient, all-powerful beings would likely be]], [[ItAmusedMe decided it'd be a decent change of pace.]]
** In the anime and earlier novels, Fermet was a fairly minor character who was thought to have been killed years before the story began. Then comes Blood Sabbath with the revelation that he isn't dead and never has been, and is in fact the BigBad of the series, having masterminded the events of the 2002 arc and caused Huey's StartOfDarkness back in the 1700s. These [[TheReveal reveals]] make pretty much everything outside of his [[AbusiveParents role in Czes's backstory]] hard to talk about.
* ''Manga/{{Bakuman}}'': Nanamine initially presents himself as a cheerful and energetic, if somewhat naive, young mangaka. Within a few chapters, you realize that he's actually a devious schemer who intends to subvert the editorial process and climb to the top of the manga world with online helpers, and it's difficult to talk about him without mentioning this. On a lesser scale, Iwase only makes a few appearances before returning to the story as a rival mangaka.
* ''Manga/{{Berserk}}'': The Idea of Evil, to the point the author originally omitted the original scene because he felt it was too much of a spoiler at too early a time.
* ''Manga/{{Bleach}}''
** Aizen was a gentle, beloved captain who was killed off early in the Soul Society arc before being revealed at the end of it as the very much alive BigBad. The reveal turned him into this trope for a while until ItWasHisSled kicked in.
** Royd Lloyd's existence is kept a secret until it is revealed that he was posing as [[BigBad Yhwach]] while fighting Yamamoto, and it's impossible to mention any of Royd's actions without spoiling that Yhwach was not the one who fought against and lost to Yamamoto. Even his name is a spoiler.
** Kanae Katagiri is Uryuu's MissingMom, but she isn't revealed until the final arc because her story is the key to the resolution of the plot; it connects Ryuuken's refusal to be a Quincy with the following: his estrangement from Uryuu, Masaki's death, Ichigo's origins and, above all, it contains the secret that leads to the defeat of Yhwach.
** Merely the name Yachiru Unohana is this, since while it had been established some time before that Kenpachi Zaraki had named the little girl he adopted after someone important to him, finding out just ''who'' this person really is does a complete 180 on the previous characterization of Captain Retsu Unohana, who before had been portrayed as the kindly TeamMom of the Gotei 13 ([[BewareTheNiceOnes although people are afraid to get on her bad side]]) but is in fact the previous Kenpachi and an AxCrazy former criminal.
* ''Anime/BloodPlus'': Diva is [[CainAndAbel Saya's twin sister]] and the series' BigBad. She also does not make an on-screen appearance until the end of Episode 23, and her identity is not fully revealed until Episode 24. This pretty much makes her name the only thing you can mention about her without spoiling the entire first half of the series.
* ''Anime/BodaciousSpacePirates'': Ironbeard, captain of the Parabellum, during the last arc of the anime. He turns out to be [[LukeIAmYourFather Marika's father]], who was stated to have died at the beginning of the anime and the reason Marika had to become captain of the Bentemaru in the first place.
* ''Manga/{{Bokurano}}''
** Youko Machi, since she's from another Earth, is Koyemshi's sister (which in turn reveals that he used to be human), and planned for the kids to get involved in the game from the very beginning. It's difficult to talk about her without mentioning any of this.
** Junji "Katari" Karita appears in one scene, falsely claims to be a Zearth pilot (thus [[SpannerInTheWorks derailing the plan to go public about Zearth]]) and is killed shortly thereafter. Essentially, his name and gender are all you can reveal without spoiling this.
* ''Anime/CasshernSins'': Luna.
* ''VisualNovel/{{CLANNAD}}'': Ushio Okazaki. Her existence as [[IllGirl Nagisa]] and [[TheHero Tomoya's]] daughter doesn't spoil the fact that the two of them ultimately get together, [[SupportingHarem as it's made more than clear from the beginning that Nagisa is the main girl]], but the fact that she's an actual character in her own right ''does'' spoil the fact that the anime continues on after they graduate to follow their married life. Her backstory also spoils [[ItWasHisSled the relatively well-known fact]] that Nagisa dies in childbirth.
* ''Anime/CodeGeass'': Lelouch's supposed-to-be-dead mother Marianne (whose spirit has been hiding in Anya).
* ''Anime/ConcreteRevolutioChoujinGensou'':
** Once a certain group photo starts getting passed around, prepare for the inevitable spoilers that the brunette on the left of it is Jin Nakagawa, who not only is Jirou's childhood friend but is Sword Phantom Claude. Nakagawa also helps Kikko out with suppression of her dark side, spoiling the fact that Kikko is in need of a husband so she can be a devil queen.
** When an evil Hyouma shows up, it spoils the fact Hyouma is a time traveller who tries to change the past.
* ''Manga/DailyLivesOfHighSchoolBoys'': Habara may look utter unremarkable (she's the DistaffCounterpart of the local RidiculouslyAverageGuy Tadakuni), but she has very significant {{backstory}} which cause most tropes under her--as well as her RedBaron during the time--to be spoilered.
* ''Anime/DanganRonpa3'':
** Miaya is hard to talk without revealing that Monaca [[KillAndReplace killed and replaced her]] and came into the game as a robotic avatar of her. Monaca is also this as well since she was [[NotMeThisTime not the mastermind of the final killing game]].
** As for Tengan aka the actual BigBad of the anime, one can only expect him to be this.
** The fact that Chisa is a Remnant of Despair throws her characterization into a loop.
** Ryota was originally a downplayed version of this trope since his role was changed when the fans learn that Enoshima used his anime to get the Remnants of Despair on her side. Then, there's his role in Side: Hope...
* ''Manga/DeathNote'': Mello and Near; the fact they're [[HeroAntagonist L's]] successors (coupled with L's utter refusal to give up on the Kira case) are an easy tip-off to the fact that L dies.
* ''Manga/DetectiveConan'': In episode 11, Narumi Asai, the kindly and seemingly innocuous female doctor who helped out Conan, Kogoro and Ran during their stay in Tsukikage Island turned out to be a man who cross-dressed as a disguise to enable him to investigate the suspicious death of his father and plot his revenge against the culprits. He was also notable to be the only murderer of the week who was DrivenToSuicide after Conan exposed him, contributing greatly to his CharacterDevelopment and he would later consider his failure to prevent Asai from committing suicide as [[MyGreatestFailure his greatest blunder]].
* ''Anime/DragonBallZ'': Raditz, being Goku's brother who reveals that they're both from a race of alien conquerors.
* The ''Franchise/EvilliousChronicles'' is absolutely '''full''' of them.
** Ney Futipe, a seemingly minor character in ''LightNovel/ClotureOfYellow'' until she's revealed at the end to be TheMole. Then comes the later revelations that she's the illegitimate child of Prim and Arth, as well as one of the incarnations of Gretel.
** Just stating the name Cherubim Venomania gives away TheReveal in ''LightNovel/TheLunacyOfDukeVenomania'' pertaining to Steriasis's true identity.
** The Demon of Gluttony, mostly thanks to him being killed, absorbed and replaced by Banica Conchita at the end of ''LightNovel/EvilFoodEaterConchita'', who goes on to become Master Of The Graveyard and one of the franchises main villains.
** Sickle, who is the TopGod and BigGood. Knowing this radically rewrites what one knows about the origins of the series world, religion and Levia-Behemo.
** Eve Moonlit, the Original Sinner, who is revealed at the end of ''LightNovel/GiftFromThePrincessWhoBroughtSleep'' to be the true identity of the Demon of Sloth, as well as Mikulia Calaground, Platonic ''and'' Margarita Blankenheim.
** From the same novel there's also Mayrana Blossom, who's existence as Julia's body double isn't given until TheReveal.
** Irregular, who is revealed in ''Literature/SevenCrimesAndPunishments'' to, against all implication, ''not'' be the same individual as Allen. The same book also has Punishment, who's very existence isn't even hinted at until his brief appearance at the end.
** Seth Twiright, the researcher referenced multiple times in Original Sin Story, until there comes the big bombshell late into ''LightNovel/FifthPierrot'' that he's the Demon of Wrath.
* ''Manga/FairyTail''
** Zero is the GreaterScopeVillain of the Nirvana arc and the SuperPoweredEvilSide of Brain, the BigBad of the arc. Zero doesn't appear until all of the other members of the Oración Seis are defeated, and his existence has little {{Foreshadowing}}.
** Queen Chagot at first seems to be TheManBehindTheMan to King Faust, and is even regarded as a deity. But it turns out that Faust is acting on his own terms, and that Chagot is ''hardly'' a deity. She ultimately isn't as evil as initially assumed.
** Zeref. Even the fact that he's alive at all is a spoiler; this combined with him being [[{{Bishonen}} quite]] [[DeathSeeker diff]][[WoobieDestroyerOfWorlds erent]] then how he had been [[EvilSorcerer originally described]] makes it essentially impossible to mention him to someone who hasn't read up to the point where he appears without spoiling something. Even his last name spoils a major element in the series.
** Acnologia first appears out of nowhere at the end of the Sirius Island arc (same arc in which Zeref is revealed) to ''nuke the entire island'', leading to the members of Fairy Tail frozen in time for seven years. He then is revealed to be a dragonslayer turned Dragon and is the main reason they're not around anymore.
** Future Lucy and Future Rogue for mainly being from the BadFuture, and are not revealed until the end of the Grand Magic Games arc. Same thing with the seven dragons from the future that come back to present day.
** Silver from the Tartaros dark guild is revealed to be Gray's father and possessed by the demon Deliora. Except the second reveal isn't true, and he just wants Gray to kill him.
** The reason that E.N.D., [[TheGhost the guildmaster]] [[GreaterScopeVillain of Tartaros]], is only referred to by an acronym is because his full name is '''E'''therious '''N'''atsu '''D'''ragneel.
** Showing a single image of Gray after the second TimeSkip is almost certain to be a giveaway of his FaceHeelTurn.
* ''Literature/FromTheNewWorld'': the Fiend ("Akki") who is actually Mamoru and Maria's child who has been raised by the monster rats.
* ''Manga/FruitsBasket'': Akito Sohma - specifically, [[UnsettlingGenderReveal her gender]]. Many of her entries either blank out her name or [[PaperThinDisguise blank out her pronouns]], although it's also acceptable to simply call Akito a "he", considering that everyone in-story (including [[{{Bokukko}} Akito herself]]) refers to her as such until the tail end.
* ''Manga/FullmetalAlchemist''
** King Bradley is difficult to mention without revealing that he's secretly the Homunculus Wrath (Pride in [[Anime/FullmetalAlchemist the first anime]]).
** His "son", Selim Bradley/Pride even more-so. It's nicely handled on the character page by listing them as separate characters on separate pages, though Pride is pretty much an all-white entry as a result.
** Ling Yao and the second incarnation of the homunculus Greed are very difficult to discuss without revealing that they are (more-or-less) one and the same, due to the latter possessing the former's body.
** Everything about Father is a spoiler, including his appearance - which is identical to Hohenheim and thus reveals an important connection between them.
** The 2003 ''Anime/FullmetalAlchemist'' anime:
*** The BigBad Dante.
*** Lyra as well. She appeared early on and is a minor antagonist but appears again later on... Sort of.
* ''Anime/GaoGaiGar'': Pizza of the Four Machine Kings a.k.a. Soldato J-002, pilot of the Giant Mechanoid King J-Der.
* ''Anime/GirlsUndPanzer''
** The Maus, technically treated as a character like some of the other tanks, is a surprise Black Forest unleashes on Oarai, to devastating effect; it only appears at the end of the penultimate episode of the first series.
** Maho Nishizumi has a large number of tropes spoilered out, especially concerning that 1)she is defeated in the finals, 2)In ''Little Army'', she won by firing on an enemy flag tank that went to rescue one from her team, and 3)Contrary to her initial first impression as an AloofBigSister, she actually loves Miho dearly, and chooses to be Nishizumi heiress so that Miho will not have to.
** Koume Akeboshi, the girl Miho saved from drowning in the last tournament, and resulted in Black Forest's defeat. Her only scene involves her talking about that plot point and [[HeartwarmingMoments thanking Miho for saving her]]. Her name is essentially the only thing you can mention without spoiling it, albeit in large part because it's found in supplemental materials.
* ''Franchise/{{Gundam}}''
** ''Anime/MobileFighterGGundam'': The character page spoilers out every last entry (and the name) for Major Ulube Ishikawa, due to him being revealed as the BigBad about, oh, four episodes from the end. Specially since until then, he was seen as ''the'' ReasonableAuthorityFigure of the series.
** ''Anime/MobileSuitGundamSEED'': Rau Le Creuset, whose status as BigBad, OmnicidalManiac, and clone of Al La Flaga are revealed in the last five episodes of the show.
** ''Anime/MobileSuitGundamZZ'': Glemmy Toto, who is both TheStarscream and a clone of Gihren Zabi, facts that aren't outed until the end.
** ''Anime/MobileSuitGundam00'': Ribbons Almark, the real BigBad of the first season and of the entire series.
** ''Anime/GundamBuildFightersTry'': A mysterious girl sets off the events of the ''Island Wars'' OVA. Discussing anything more about her risks spoiling the fact that her parents are none other than [[Anime/GundamBuildFighters Reiji and Aila Jyrkiäinen]].
* ''Anime/IdolmasterXenoglossia'': Yukiho Hagiwara, who initially appears as a shy girl with a tendency to fall asleep at various moments, but in the ChristmasEpisode is revealed to be [[DragonInChief Chihaya Kisaragi's]] friend and a [[TheMole spy for Turiavita]], trying to help Chihaya get [[HumongousMecha Imber]] back from Haruka, and goes as far as to snatch Imber's key from Haruka in the next episode after revealing her true motives and take Chihaya's (who gets Imber) place as Nubilum's pilot.
* ''LightNovel/IsThisAZombie'': Describing tropes that apply to Kyoko is very difficult if you really want to avoid spoiling the fact that she's the serial killer who murdered Ayumu. Entire entries on most of the trope pages relevant to her are almost completely spoiler tagged.
* ''Anime/JewelpetTwinkle'': Alma, the main antagonist, is full of twists - even [[{{Bifauxnen}} her gender]] is one, but the biggest is that she's the heroine's crush's long lost twin sister.
* ''Anime/{{K}}'': Adolf K. Weismann seems at first to be [[FromASingleCell a huge]] [[MysteriousWatcher pileup of]] [[ManOfWealthAndTaste villain tropes]], down to the EvilLaugh and [[WhiteHairBlackHeart Sephiroth hair]]. Then it turns out he's actually ''TheHero'', memory-wiped ''and'' body-swapped. ...To be fair, he ''was'' possessed by the bad guy when he did the EvilLaugh, though.
* ''Franchise/KagerouProject'': There are plenty examples to be found, but probably the biggest is Kano, who's background and true motives are huge twists for later in the series.
* ''Anime/KillLaKill'':
** It gets hard to talk about the Life Fibers in the later half of the series without spoiling the fact that they're sentient aliens that had their hands in humanity's accelerated evolution. Consequently, any character that is related to them or has a hand in Ragyo's EvilPlan to bring the Life Fibers back to power is also spoileriffic.
** Ragyo herself qualifies, as she only makes sporadic appearances in the first half and her motives and character aren't established until later on.
** Nui is easily the big one however, since she appears close to halfway in to deliver an absolutely game changing revelation. This is without giving away the fact that she's an ArtificialHuman.
* ''Anime/LegendOfGalacticHeroes'': It's ''really'' hard to discuss the series without giving away the fact that Sigfried Kircheis, one of Reinhard von Lohengramm's most loyal and competent subordinates and the closest person he has to a true friend, dies about a quarter of the way through the series while shielding Reinhard from an assassination attempt. Even long after the fact, Kircheis's PresentAbsence makes itself felt throughout the rest of the series.
* ''Manga/LetterBee''
** Talking about Gauche Suede at virtually any point after the first chapter is likely to involve spoilers; after delivering Lag to Cambel Litmus, he was promoted to the head office, then lost much of his heart, disappeared and ended up with Reverse. Much of the early story involves Lag finding out what happened to him.
** "Roda", Noir's accomplice, who bears the name of Gauche's dingo. Discussing her inadvertently reveals Gauche's status as Noir.
** Jick Barrol, given his status as a major antagonist complicit in the Amberground government's misdeeds.
* ''Manga/{{Loveless}}'': Seimei Aoyagi has over half the tropes on his entry on the character paged blacked out after TheReveal that he's alive after having been assumed dead since the start of the story. The revelation that he's alive also completely turns his prior characterization as a loving older brother on its head.
* ''Franchise/LyricalNanoha''
** Alicia only gets mentioned with spoiler warnings since any discussion about her, from her role in the story, to her relationship with the characters, to her appearance, to her family name will reveal that [[EvilMatriarch Precia]] had another daughter before Fate... and that [[ReplacementGoldfish Fate was a failed attempt to revive her]].
** Rein a.k.a Reinforce Zwei. You know something must've happened to the first Reinforce when a character with the same name has the German word for two on her name.
* ''Anime/MagicKnightRayearth'': Princess Emeraude is revealed to be the BigBad, not the BigGood.
* ''Anime/MaiHime'': Shizuru initially seems like nothing more than the StudentCouncilPresident and a friend of Natsuki's who occasionally helps her out. Then, in the last few episodes, she's revealed as a Hime and kills quite a few people for Natsuki's sake, while revealing that she is ''in love with Natsuki.'' Most discussion of her character tends to focus on her actions toward the end.
* ''Anime/MaiOtome'':
** From the manga, there's Sergay Auguste Taiki, who, unlike his PunchClockVillain counterpart from the anime, has ''no'' redeeming qualities and turns out to be the BigBad.
** From anime and manga series, Lena Sayers. The spoiled twists are different for each adaptation, but one thing both versions of her have in common is that she's Arika's mother.
* ''Anime/MawaruPenguindrum'' has a whole lot of twists and pieces to be put together, so naturally there are a lot of characters with heavily spoilered pages. Yet somehow, in amongst characters whose very identity is a spoiler, Kanba seems to have it worst, despite being one of the leads. This is because a lot of what he does even very early on in the anime (before the audience understands, of course) relates back to one really big spoiler, which also happens to represent one of the most complex and centralised parts of the plot. Not only that, his entire backstory is a spoiler as well.
* ''Mazinger'':
** Most of spoilers in ''Anime/MazingerZ'' and ''Anime/GreatMazinger'' revolve around Kenzo Kabuto and Archduke Gorgon. The former one was thought being dead for a long while, but at the end of the series it was revealed he was alive. Oh, and he is {{The Hero}}'s father. He also is a major character of the sequel, where he gets KilledOffForReal, so it is pretty much impossible talking about him with spoiling key plot points of both series. Gorgon's first appearance revealed the supposedly extinct Mykene civilization still existed. At the beggining he seemed another ObviouslyEvil Hell's ally, but in reality he was a DragonWithAnAgenda was working for a GreaterScopeVillain as he plotted destroying both Dr. Hell and Mazinger-Z. He was successful on all accounts, so describe him means spoiling the end of the series.
** Maria Grace Fleed from ''Anime/UFORoboGrendizer'' is one of the cases where her mere name is already a spoiler. She is {{The Hero}}'s sister. However, Duke was supposed to be the only Fleedian survivor and have no family left. Maria is one of the main characters, and you can not describe her without spoiling both facts. Geez, stating her last name is a complete giveaway. And then you have Rubina. Who is she? BigBad King Vega's daughter and Duke Fleed's fiancée.
* ''Manga/MurasakiiroNoQualia'' has multiple characters that you can't really talk about without giving something away:
** Talking about Yukari, the purple-eyed deuteragonist, is practically impossible unless you mention that she dies after the first few chapters, and her death ends up creating the big plot and reason for the multiverse story to unfold, all in an effort to prevent her death.
** Talking about Hatou Manabe, the protagonist, is even worse, if possible. Try to describe Hatou to someone without mentioning that she ends up getting kidnapped by a serial killer, her arm being chopped off and reassembled by Yukari with the help of her cellphone. That said cellphone arm functioning as a proper cellphone and giving her the ability to talk to infinite parallel universe versions of herself that warn her of Yukari's death. That she can communicate with them and gain the knowledge and memories of her parallel universe-selves, can practically [[RealityWarper create a universe where magic exists]] that gives her magic abilities. And she recently obtained the realiziation that she could take over and "become" almost every person she wants to be. There's more, but... [[JustifiedTrope yeah]].
** Tenjou Nanami has it a bit easier. The only thing that is a spoiler to talk about with her is that she was Yukari's first "operation patient" and she had injuries that were "fixed" by Yukari with [[BodyHorror pieces of a jungle gym]].
* ''Manga/{{Naruto}}''
** [[KnightTemplar Danzo]], due to his involvement in the Uchiha Massacre, as well as several other characters' backstories.
** Madara Uchiha was this initially, since he was thought to be dead for a long time. Then it turns out that he ''was'' dead, and the guy who's been pretending to be him all this time is Obito Uchiha (who was not only thought to be dead, but was also formerly Kakashi's teammate). And now, Madara's other partner (Black) Zetsu forced the weakened Obito to revive him completely.
** Itachi - who was GoodAllAlong and whose death reveals ''many'' subsequent twists as a result. His brother Sasuke would've been one too, before his FaceHeelTurn became ItWasHisSled (hard to hide considering it drives the plot of ''Shippuden'' and Part II in the manga), plus Sasuke is pretty much the {{Deuteragonist}} of the story.
** Tobirama and Hashirama, after the revelation of their backstory, which basically put into motion a chain of events leading to the current timeline's ordeals.
** Kaguya Ĺtsutsuki, being the very first Chakra user and the ''mother'' of the Sage of Six Paths, dwarves every single other Walking Spoiler before her. This gets even worse once it is revealed that she is not a PosthumousCharacter and promptly proceeds to usurp ''Madara''[='=]s position as the BigBad.
** And for the shippers, Himawari, whose mere existence makes ''her surname'' a spoiler. Her appearance alone should tell you who her parents are.
* ''Anime/NeonGenesisEvangelion''
** Though it's entered ItWasHisSled territory now, most tropes about Yui Ikari and Unit 01, since the two are in fact one and the same, with Unit 01 containing Yui's soul. Yui's face is also considered a spoiler and is not revealed until late in the series because of her very close resemblance to Rei Ayanami, who is in fact a clone of Yui and a ReplacementGoldfish for her husband Gendo.
** Kaworu, not only for being the 17th Angel, but also because he doesn't appear until [[CerebusSyndrome everything has already gone to hell]].
** In the third film of the remake ''Anime/RebuildOfEvangelion'', it's impossible to talk about Sakura Suzuhara, Toji's little sister, appearance or role as a medical officer without spoiling the 14 years time skip.
* ''Manga/OnePiece''
** Just listing the main characters is a spoiler, as the series plays FiveManBand straight, deconstructs and slowly averts it. A special mention goes to two antagonists who make HeelFaceTurn and join Luffy's crew.
** Discussing Vivi typically reveals that she's undercover in Baroque Works as Ms. Wednesday, and with later developments that she's technically a World Noble.
** It's difficult to talk about the four Cipher Pol agents undercover in Water 7, especially not Kaku and Lucci, without revealing their being TheMole.
** Rouge -- knowing anything about her (especially her ''full name'') reveals that Luffy and Ace aren't even related.
** It's impossible not to mention Sabo, who is revealed to be their other [[BloodBrothers "brother"]]. Even if you don't mind ''that'' particular revelation, there's the teeny problem about him being alive in a certain WhamEpisode.
** Blackbeard shows up as a minor character, albeit one who shares an awful lot in common with Luffy and briefly shares the spotlight with him. While he does become important later on, this jolly man turns out to be Luffy's EvilCounterpart and a true [[TheChessmaster Chessmaster]], matching Luffy's crewmates one for one with darker counterparts and manipulating everyone around him, including many other important characters we saw before, in his attempt to gain power and find the One Piece.
** Poseidon: even being on a character page reveals that a WeaponOfMassDestruction is actually a PersonOfMassDestruction.
** Dragon the Revolutionary. His full name is one of the most tightly held secrets within the series.
* ''Manga/PandoraHearts'': Jack Vessalius (who's basically a Walking Spoiler folded into ''two'' Walking Spoilers, since everything we ''thought'' we learned about him is essentially turned inside out in the series's biggest WhamEpisode). There's also anything to do with Glen and his legacy, Lacie, and the majority of what ''[[UnreliableExpositor actually]]'' happened one hundred years ago. And since nearly ''every'' character ends up with some significant tie to that incident, even and ''especially'' the protagonist himself, the [[JigsawPuzzlePlot series as a whole]] can be considered its own Walking Spoiler.
* ''Anime/PantyAndStockingWithGarterbelt'': The Mayor. His full name, description and every trope except Walking Spoiler is whited out.
* ''Franchise/PrettyCure'': every SixthRanger is a LateArrivalSpoiler. However, TheDragon Regina from ''Anime/DokiDokiPrecure'', started out as a villain, got quickly befriended by Mana, then Regina went nuts, then she became normal again and joined the Pretty Cure for about two episodes, and then she's brainwashed by her [[BigBad father]]. She's PutOnABus for about 13 episodes, and when she's back, she gained the Miracle Dragon Glaive, one of the three legendary regalia. Regina is Mana's friend, but it's a spoiler that she's ''still'' a villain, while every DarkMagicalGirl who wasn't an EvilKnockoff joined the Pretty Cures. And it's also a spoiler that she's ''not'' Cure Ace.
* ''Anime/PuellaMagiMadokaMagica'' is nearly ''half'' {{Wham Episode}}s, making it near impossible to talk about without revealing ''something'', but some individuals are a cut above the rest.
** Mami Tomoe's death is her most important "action", and talking about her or the story as a whole without pointing out that a main character is mercilessly killed three episodes in is rather difficult. Then MemeticMutation turned her death into ItWasHisSled.
** Oktavia von Seckendorff, Sayaka's witch self, reveals that Magical Girls become witches as well as which character will be the first to do so on-screen.
** Homura's identity, motivation, relationship with Madoka, and even her powers are all huge spoilers. Goes double for the [[GirlishPigtails pigtailed]] [[{{Meganekko}} glasses-wearing]] version of Homura ("[[FanNickname Moemura]]"), who first appears when all this is revealed, and goes '''triple''' for her in ''[[Anime/PuellaMagiMadokaMagicaTheMovieRebellion Rebellion]]''.
** Madoka herself is not an example, but two of the forms she takes are: Kriemhild Gretchen, her witch form, and [[MessianicArchetype Ultimate Madoka]], the CosmicEntity she becomes in the final episode.
** Kyouko only shows up after things go to hell, with everything about her character being related to the darker elements that were only hinted at prior, and all her major contributions are being involved in spoilerific events.
** A bit of real life walking spoilers as well, the producers tried to keep the fact that Creator/GenUrobuchi wrote the script a secret from viewers due to how he automatically ups the tragedy quotient of anything he's involved with. When his involvement was leaked [[TrollingCreator he lied]] and said he wanted to write a heartwarming story for a change. When you consider how the story does end, it turns out the creators still got the last laugh overall.
* ''Manga/{{Saki}}'':
** The eponymous main character's older sister, Teru. When she is first mentioned, it's implied that she and Saki are not on good terms at the moment, but Saki has fond memories of her. When she first appears in the present, she's become cold, detached, and [[IHaveNoSon refuses to acknowledge being related to Saki]]. That latter part is an unpleasant surprise to Saki, and is somewhat surprising considering what we had heard of Teru.
** [[NoNameGiven A so far unnamed girl]] is shaping up to be this, given her appearance in a series of flashbacks that implies that 1)she's somehow related to Saki and Teru, and 2)whatever happened to her is related to the Miyanaga family falling apart.
* ''Manga/SakuraGari'': Sakurako Saiki. While she appears relatively early in the story, her ''actual'' role in it as well as her twisted motivations aren't revealed until almost the end. Same goes to the fact that ''he'' is a boy named Youya.
* ''Manga/SchoolLive'':
** It's hard to discuss the series, especially the manga as it is revealed under ten chapters in, without mentioning that Megu-nee is actually {{dead|all along}}.
** Ruu doesn't appear until after the girls leave the school. She's Rii's little sister who had never been referenced for. Even more of a spoiler is that Rii underwent a SanitySlippage and Ruu is actually [[ThroughTheEyesOfMadness a teddy bear]].
* ''LightNovel/SundayWithoutGod'': Hampnie Hambart, who at first appears to be a main character but then dies in episode three. As with Mami Tomoe listed above, his death is his most important "action," so it can be difficult to summarize the series as Ai's journey without revealing that Hampnie ''isn't'' one of her traveling companions. The roles of Alice and Dee, who appear halfway through the anime, can also be difficult to summarize without spoiling that they're trapped in a GroundhogDayLoop and that one of them may actually be dead.
* ''Anime/TengenToppaGurrenLagann''
** Nia Teppelin is the Spiral King's daughter, appears after Kamina's death, and is the Anti-Spiral messenger.
** The Anti-Spiral is the series true BigBad.
* ''Manga/TsubasaReservoirChronicle'': Any mention of the real Syaoran or real Sakura inherently spoils that the Syaoran and Sakura the series focuses on are clones.
* Raizen in ''Manga/YuYuHakusho''. Describing him in more than general terms reveals one of the biggest twists in the series, since he's [[HalfHumanHybrid Yusuke's demon ancestor]].
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