History Main / PersonalityBloodTypes

* ''Franchise/DreamFestival''' includes this information on the main characters' profiles. Kanade and Junya are Type O, Shin is Type A, Chizuru is Type B and Itsuki is AB.

Compare: FourTemperamentEnsemble

* The manga of ''Manga/CardcaptorSakura'' gives blood types for most (if not all) characters. [[http://www.onemanga.com/Cardcaptor_Sakura/29/36/ Even the nonhuman ones]].

* In the {{Hentai}} VideoGame/RPGMaker game ''Violated Heroine'', you can customize the heroine's blood type at the beginning of the game to raise combat stats: Type A grants more Agility but less Spirit, Type B [[GlassCannon more Attack but less Defense]], Type O more Defense but less Attack, and Type AB more Spirit but less Attack.

* In the {{Hentai}} RPGMaker game ''Violated Heroine'', you can customize the heroine's blood type at the beginning of the game to raise combat stats: Type A grants more Agility but less Spirit, Type B [[GlassCannon more Attack but less Defense]], Type O more Defense but less Attack, and Type AB more Spirit but less Attack.

In much of Asia, especially well known in Japan, [[InTheBlood blood types]] are seen to determine personalities. Wiki/{{Wikipedia}} summarizes this belief [[http://en.wikipedia.org/wiki/Blood_types_in_Japanese_culture as follows]]:

This belief was also the basis for a Japanese eugenics program during WW2, and has since been [[ScienceMarchesOn disproven]].

In much of Asia, especially well known in Japan, [[InTheBlood blood types]] are seen to determine personalities. {{Wikipedia}} summarizes this belief [[http://en.wikipedia.org/wiki/Blood_types_in_Japanese_culture as follows]]:

* ''Webcomic/{{Narbonic}}'':
** In the Director's Cut, Shaenon Garrity mentions that she had blood types worked out for the ''Narbonic'' characters. (Mell is revealed to be Type B.) The cast page for ''Webcomic/SkinHorse'' includes blood types, including for the nonhuman characters.
** As far as regular human blood types go, Tip the [[ReallyGetsAround really-getting-around]] psychologist as Type O, Dr Lee the [[OnlySaneMan Only Sane Woman]] as Type AB, and Tigerlily Jones the insanely creative TheSeventies-themed MadScientist as Type B. Taken literally with Unity whose personality ''is'' her blood; the [[MixAndMatchMan patchwork girl]] is just something to hold it.

** As far as regular human blood types go, Tip the [[ReallyGetsAround really-getting-around]] psychologist as Type O, Dr Lee the [[OnlySaneMan Only Sane Woman]] as Type AB, and Tigerlily Jones the insanely creative TheSeventies-themed MadScientist as Type B. Taken literally with Unity whose personality ''is'' her blood; the [[FleshGolem patchwork girl]] is just something to hold it.

** As far as regular human blood types go, Tip the [[ReallyGetsAround really-getting-around]] psychologist as Type O, Dr Lee the [[OnlySaneMan Only Sane Woman]] as Type AB, and Tigerlily Jones the insanely creative TheSeventies-themed MadScientist as Type B. Which was then subverted when it was revealed that she's who Unity's blood technically ''is''.

* ''Manga/OuranHighSchoolHostClub'' has an absolutely hilarious scene where the CreepyTwins convince the lead girl that the resident [[TokenMiniMoe moe boy]] is actually evil to the core by pointing out that he has the same blood type (AB) as TheChessmaster of the club. The main character immediately broke the FourthWall to apologize to any viewers with AB blood type.

* CowboyBebop's four heroes each have a different blood-type:

->''I'm such an optimist that my doctor told me my blood type was [[IncrediblyLamePun B Positive]].''
-->--'''Mark Rosewater''', ''TabletopGame/MagicTheGathering'' R&D

!!Examples

[[folder:Anime and Manga]]

[[folder:Live Action TV]]

[[folder:Webcomics]]

* In the ''Webcomic/{{Narbonic}}'' Director's Cut, Shaenon Garrity mentions that she had blood types worked out for the ''Narbonic'' characters. (Mell is revealed to be Type B.) The cast page for ''Webcomic/SkinHorse'' includes blood types, including for the nonhuman characters.
** As far as regular human blood types go, Tip the [[ReallyGetsAround really-getting-around]] psychologist as Type O, Dr Lee the [[OnlySaneMan Only Sane Woman]] as Type AB, and Tigerlily Jones the insanely creative TheSeventies-themed MadScientist as Type B.
** Which was then subverted when it was revealed that she's who Unity's blood technically ''is''.

* ''Manga/MahouSenseiNegima'': 28 of 31 class members have a blood type listed (they get a small bio page in their introduction chapter in the manga) and they all fit very well. Now has its own page [[PersonalityBloodTypes/MahouSenseiNegima here]].
** Negi is type AB which very much fits his personalty also fits his parents personalities [[spoiler: his father would be a Type B and his Mother fits Type A very well]].
*** It also befits his status as the center of the harem. AB is compatible with ''everyone''.

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* In the {{Hentai}} RPGMaker game ''Violated Heroine'', you can customize the heroine's blood type at the beginning of the game to raises combat stats; Type A grants you more Agility but less Spirit, Type B grants you more Attack but less Defense, Type O grants you more Defense but less Attack, and Type AB grants you more Spirit but less Attack.

* In the ''Webcomic/{{Narbonic}}'' Director's Cut, Shaenon Garrity mentions that she had blood types worked out for the ''Narbonic'' characters. (Mell is revealed to be Type B.) The cast page for ''Webcomic/SkinHorse'' includes blood types, including for the nonhuman characters. As far as regular human bloodtypes go, Tip the ReallyGetsAround psychologist is Type O, Dr Lee the [[OnlySaneMan Only Sane Woman]] is Type AB, and Tigerlily Jones the insanely creative TheSeventies-themed MadScientist is Type B.
** Which was then subverted when it was revealed that Unity's blood technically ''is'' her.

* The ''VideoGame/SuperRobotWars'' series often lets the player select the birthday and blood type of the OriginalGeneration main protagonist. While at first appearing purely cosmetic, their command lists are directly derived from the selection, divided by what astrological sign the birthday falls under and the blood type for a total of forty-eight possibilities. Selecting 11/11 B, the birthday and blood type of head producer Takanobu Terada, provides an EasterEgg set of commands that are usually the ideal possible set or close to it, while the character's default birthday and blood type provide another unique set that normally matches what they'll use should they appear in any other games in the franchise.

** Worst Traits: Fastidious, overearnest, stubborn, tense, obsessive, pessimistic.

** Best Traits: Passionate, active, creative, animal loving, flexible, cheerful, optimistic.
** Worst Traits: Irresponsible, forgetful, selfish, lazy, impatient, unreliable, "going own way".

** Worst Traits: Critical, indecisive, unforgiving, two-faced, aloof, "split personality".

** Worst Traits: Self-centered, cold, aggressive, unpredictable, arrogant, envious, ruthless.

* Shockingly, Cloud Strife from ''[[VideoGame/FinalFantasyVII FF VII]]'' fits the AB blood type 'personality' almost to a T. Guess which blood type he is.
* In ''VideoGame/ManaKhemiaAlchemistsOfAlRevis'', the fact that one character [[spoiler: LACKS a bloodtype in the manual foreshadows the game's {{Tomato In The Mirror}} reveal]].

* Another Japanese-influenced game, ''VideoGame/{{Skullgirls}}'', also has blood types for each of the characters, and they correspond pretty well. Some of the characters, however, don't have standard blood types; among them are SG ([[AlienBlood for Skullgirl]]), embalmed (for [[CuteGhostGirl Squigly]]), and B♭ (for Big Band).

* ''The Bronze Horseman'' by Paullina Simons. After Major Belov is severely wounded during a river assault, his wife Tatiana, a nurse in the Red Army, saves his life by donating her own blood. Belov is told it's lucky she's a [[ABNegative universal donor]]. Belov can only think with irony "[[TheHeart Of course she is]]."

* In the {{Hentai}} RPGMaker game ''Violated Heroine'', you can customize the heroine's blood type at the beginning of the game to raises combat stats; Type A grants you more Agility but less Spirit, Type B grants you more Attack but less Defense, Type O grants you more Defense but less Attack, and Type AB grants you more Spirit but less Attack.
* The original ''VideoGame/ResidentEvil'' had an intro with profiles of all the characters, including blood types.
** And all the other characters introduced later get blood types too. Interestingly enough, all the villains seem to have type O. Ironically both Chris and Claire Redfield have type O.
* When ''VideoGame/StreetFighterII'' came out, character biographies included blood type.
* ''VideoGame/SoulCalibur'' took this to a new level of absurdity: all the characters had ABO/Rh blood types in their profile. The game is set in 1587. ABO was not discovered until 1901. Amusingly enough, Edgemaster (who randomly uses a non boss characters moveset) has a blood type of O. And Ivy's blood type is [[TheCorruption "Soul Edge"]].
* ''VideoGame/DungeonKeeper'' creatures had blood types listed, for no apparent reason. It also lampshades itself with the scrolling help text if you point at a creature's blood type listing: "As if you care. Blood is blood, right?"

* In ''VideoGame/ManaKhemiaAlchemistsOfAlRevis'', the fact that one character [[spoiler: LACKS a bloodtype in the manual foreshadows the game's {{Tomato In The Mirror}} reveal]].
* As a Western game with Japanese influences, ''VideoGame/BattleGirl'' lists its heroine's blood type among her vital stats. It's B, which suits her.

* Each character in ''VideoGame/DeathSmiles'' has their blood type [[AllThereInTheManual listed in the manual]].
* In the Japanese version of ''[[VideoGame/FireEmblemElibe Fire Emblem: Rekka no Ken]]'', the elemental affinity of the tactician (an avatar for the player) was determined by both birth date and their blood type, both which could be manually chosen. In the international releases, since this trope doesn't have as much relevance, it was changed so that birth date was the sole factor in deciding affinity.
* Shockingly, Cloud Strife from ''[[VideoGame/FinalFantasyVII FF VII]]'' fits the AB blood type 'personality' almost to a T. Guess which blood type he is.
* The indie RPG ''VideoGame/CthulhuSavesTheWorld'' has Umi, one of the party members, bring this up as banter. Umi states that her blood type is B+, making her a cheery person. This is averted by the fact that the other party members are an Outer-God-turned-hero, a talking sword, a necromancer, an alien, a crazy priest and a demon-dragon. These members respectively have ink, nothing, a lengthy soliloquy of pain, Uranium, and acid. The old man is insane, and therefore cannot remember his blood type.

* ''Manga/OuranHighSchoolHostClub'' has an absolutely hilarious scene where the CreepyTwins convince the lead girl that the resident [[TokenMiniMoe moe boy]] is actually evil to the core by pointing out that he has the same blood type (AB) as TheChessmaster of the club. The main character immediately broke the FourthWall to apologize to any viewers with AB blood type.
* Subversion and possibly, a deconstruction: In episode 9 of ''Manga/LuckyStar'' it turned out that the personality types according to blood type were almost completely inaccurate. [[note]]For the record, the characters examined were Kagami and Tsukasa Hiiragi, which logically speaking, they have the same blood type because they are twins, yet they have [[PolarOppositeTwins distinctly different personalities]].[[/note]]
* An episode of ''Manga/{{Naruto}} Shippuden'' deals with this. Orochimaru asks whether Kabuto is a Type A, much to his chagrin that he's AB.

* In ''Anime/RevolutionaryGirlUtena'', one episode has a tidbit where Nanami and her posse discuss the blood type-personality correlation. It reveals that, while their parents and Nanami have Type B blood, Touga (her AloofBigBrother) has Type A, which should be impossible... it turns out that [[spoiler:[[NotBloodSiblings both of them were adopted]]. Although, due to how shaky things were getting between the two and the fact that she had been too young to remember, Nanami automatically assumes that just Touga was adopted]]...
** There's also this scene:
-->'''Utena:''' Himemiya, you're type-AB, right? Let's see, type-[=ABs=] are elusive and seldom reveal their true feelings, huh?\\
'''Anthy:''' And you're type-B, right, Utena-sama? [[StealthInsult Type-Bs are self-centered and prone to misconceptions...]].\\
'''Utena:''' Yeah, sorry, okay.
* You could say that this is subverted in ''Yu-Gi-Oh'' with main character Yugi Moto possessing type AB Negative blood. Cool, controlled and unforgiving definitely aren't the best choice of words to describe him.
** They are, however, a good choice of words to describe his ''alter-ego'' Yami Yugi, who shares his blood type on account of sharing his body.
** Also, a sub-characteristic associated with AB blood type is SplitPersonality. Or an least mood swings. Which Yugi has. In spades.
** It's played straight with [[SplitPersonality Bakura]], who is also type AB.
** The above rule is ''not'' played straight with [[SplitPersonalityTakeover Marik]], though his actual given type (B) does fit his personality much better than AB. The fact that Marik's other half came from very different circumstances than Yugi's or Bakura's is probably why TheLastOfTheseIsNotLikeTheOthers.
* How to Read, the final volume of ''Manga/DeathNote'', gives the blood type of all the major players (save L) and several minor characters. Light, Mello, Mikami, Soichiro, Naomi Misora, and Demegawa had A. Near, Matsuda, and Watari had B. Misa, Takada, and Kyosuke Higuchi had AB. Raye Penbar, Matt, and the female members of the Yagami family had O.
* Kamiyama, Hayashida and Maeda deduce that the enigmatic Freddie of ''Manga/CromartieHighSchool'' is a B-type from looking at his completely unpredictable movements (sumo teppo practice shows him to be an A type and holding a textbook upside down is considered either a B type or an AB type).

** Negi is type AB which very much fits his personalty also fits his parents personalities [[spoiler: his father would be a Type B and his Mother fits Type A very well]]

* Volume 6 of the ''VideoGame/{{Harukanaru Toki no Naka de}}'' manga includes a scene with Akane, Tenma and Shimon trying to guess the blood types of the Hachiyou based on their personalities.
* In ''Anime/WeissKreuz'', the personalities of the four original members of Weiss are all [[FourTemperamentEnsemble fairly well-matched]] to their respective blood types : Omi is type O, Aya is type A, Ken is type B, and Youji is type AB.
* In Volume 4 of ''Manga/StrawberryMarshmallow'', there's a Q&A with a couple of questions breaking up the chapters. Blood type is asked early on. To compare:
** The Ito sisters, Chika and Nobue, share blood type A.
** Miu is type B.
** Ana is type AB.
** Matsuri is type O.
* The manga of ''Manga/CardcaptorSakura'' gives blood types for most (if not all) characters. [[http://www.onemanga.com/Cardcaptor_Sakura/29/36/ Even the nonhuman ones]].
* In ''Manga/TheCherryProject Chieri'' calls LoveInterest Tsuzuki a "Typical A" and he calls her a "Typical B" back.
* Cowboy Bebop's four heroes each have a different blood-type
** Jet is type A
** Faye is type B
** Ed is type AB
** Spike is type O
* In ''Manga/{{Sketchbook}}'' many characters' personalities seem to fit their stated blood types. Hazuki Torikai (type A) is the straightest example, which is lampshaded several times in the manga. However, [[{{Cloudcuckoolander}} Sora]] [[TheQuietOne Kajiwara]] (Type A) and [[HotBlooded Daichi]] [[HairTriggerTemper Negishi]] (Type AB) are subversions, which is also lampshaded.
-->'''Daichi Negishi:''' [[NoIndoorVoice I'M AB!]] DID YOU THINK I WAS B? BASTARDS! WELL I'M NOT! SORRY!
* The cast of ''Anime/{{Ronin Warriors}}'' follow the bloodtypes to the T
** Ryo Sanada and Shuu Rei Fuan are Type O
** Seiji Date is A
** Shin Mouri is B
** Touma Hashiba is AB
* ''Manga/DGrayMan'' includes this information (along with birthdates and nationalities) for all major characters up to about volume 18. Most of them are AllThereInTheManual in the fanbook, though.
* Manga/BlueExorcist includes the info for some For those wondering, [[IdiotHero Rin]] is type A, [[BadassBookworm Yukio]] and [[ActionGirl Shura]] are both type O, [[TheChick Shiemi]] and [[HotBlooded Bon]] are both type B. [[BadassPreacher Fujimoto]]'s a type AB and [[GuileHero Mephisto's]] isn't given.

* And there´s a ''Manga/OnePiece'' entry. In a SBS Oda revealed the Straw Hats' blood types as:

** Ussop is S

*** The catch is that Oda explained that the nomenclature isn´t uniform yet so there's people out there that use "A,B,O/C,AB" pattern. So if A -> X, B -> F and S -> O, we get the trope played straight (With the curious exceptions of [[LovableCoward Usopp]], [[BoisterousBruiser Franky]] and [[ChivalrousPervert Brook]]).
* Pretty much the entire point of ''Ketsuekigata-kun!'' (pictured above), which centers around personifications of the four ABO blood types. Each of the four types is voiced by an actor who has that blood type.
* The issue pops up in a chapter of ''Manga/FrankenFran'', in which the school becomes obsessed with the theory to the point that it causes social splits and discrimination. This causes problems for Adorea, whose dominant blood type is constantly changing due to the sheer number of organs she stores in her body.