History Main / PersonalityBloodTypes

** Marik, despite also having SplitPersonality like Yugi and Bakura, is ''not'' type AB. However, his actual blood 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.

* In the ''VideoGame/PrincessMaker'' games, stats are determined by blood type. And in 2, it also determines how stressed the girl gets; one notable aspect is that a girl with Type A blood will [[TheStoic never smile]].

* 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).

* Episode 3 of ''Manga/RecoveryOfAnMMOJunkie'' has a scene where Koiwai Sakurai asks if he's an A Type because he's such a stickler (he is), then uses his own O bloody type to justify his glib antics. A disclaimer immediately appears, stating that personality have nothing to do with blood types.

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_type_personality_theory as follows]]:

* The four main leads of ''Manga/WotakoiLoveIsHardForOtaku'' has different blood types which corresponds to their respective personality stereotype.

* 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, have both the same blood type because they are twins, yet they have [[PolarOppositeTwins distinctly different personalities]].[[/note]]
* {{Lampshaded}} in ''Manga/MagicKnightRayearth'', Fuu includes her blood type when introducing herself to Hikaru and Umi. Mystified, they ask why; and she hastily replies in case she needs medical attention.

* ''Manga/NegimaMagisterNegiMagi'':
** 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. (Those who don't get a specified blood type are the vampire, the ghost and the robot...)
** 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''.

* 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.

* ''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. (Those who don't get a specified blood type are the vampire, the ghost and the robot...)
** 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''.

* 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.

[[folder:Web Comics]]

* ''Webcomic/ASimpleThinkingAboutBloodType'' (pictured above) is an anthology series that portrays the personifications of the four blood types and how they stereotypically react to various life situations. Type A is a law-abiding but considerate people-pleaser. Type B is carefree and outspoken. Type O is goal-driven but temperamental. Type AB is a rational individualist.

** Mari, despite also having SplitPersonality like Yugi and Bakura, is ''not'' type AB. However, 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.

%% "Characters have blood types is not a trope". Examples need to explain how the characters' blood types are related to their personalities. Examples that doen't mention any correlation between the characters' personalities and their assigned blood types are deemed shoehorns and will be cut.

* You could say that this is subverted in ''Manga/YuGiOh'' 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.

* You can choose a blood type for the protagonist in ''VideoGame/TokimekiMemorialGirlsSide'' games. It only affects the horoscope. All of the love interests have blood types listed as well.

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

%% "Characters have blood types is not a trope". Examples need to explain how the characters' blood types are related to their personalities.

%%* ''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.
%%* The manga of ''Manga/CardcaptorSakura'' gives blood types for most (if not all) characters. Even the nonhuman ones.

%% * ''Anime/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.

%%* Parodied in ''Manga/MedakaBox'', where ''every'' character has type AB.

* 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
* In ''Franchise/SailorMoon'', all of the main characters and a few minor ones have their blood types listed.
** Type O: Usagi/Sailor Moon, Chibiusa/Sailor Chibi Moon, Makoto/Sailor Jupiter, Michiru/Sailor Neptune, Haruna-sensei
** Type A: Mamoru/Tuxedo Mask, Ami/Sailor Mercury, Setsuna/Sailor Pluto, Seiya/Sailor Star Fighter
** Type B: Minako/Sailor Venus, Haruka/Sailor Uranus, Yaten/Sailor Star Healer
** Type AB: Rei/Sailor Mars, Hotaru/Sailor Saturn, Taiki/Sailor Star Maker, Naru

%%* 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.
* 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.

%%* Like many series, ''Manga/MyHeroAcademia'' shows little character profiles that include blood type. However, this is actually plot significant, since [[spoiler:blood type affects how long HeroKiller [[KnightTemplar Stain]]'s Quirk affects people]].

%%* ''VideoGame/CrazyTaxi'', at least in the manual.
%%* Each character in ''VideoGame/DeathSmiles'' has their blood type [[AllThereInTheManual listed in the manual]].
* ''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 blood type in the manual foreshadows the game's {{Tomato In The Mirror}} reveal]].

%%* 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.

* ''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]]."
* An early PA in ''VideoGame/StarOceanTillTheEndOfTime'' gives the player the option of choosing Fayt's blood type. Each choice either raises or lowers the affection of certain party members, giving insight into what personality types they like and which ones they don't.
** Judging from Fayt's actual personality in the game, Type O seems to be his blood type by default (since the two that go up from this are Sophia (his childhood friend) and [[IneffectualLoner Albel]].) To support the fact that he remains optimist throughout the game, agrees to almost everything and is very sociable to the point where he makes friends easily. Also, if the group were to ever get ambushed, he announces that "He was careless!"
%%* When ''VideoGame/StreetFighterII'' came out, character biographies included blood type.
%%* 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 the character will use should s/he appear in any other games in the franchise.

%%* [[http://evil-inc.com/2011/03/09/?post_type=comic Parodied]] in {{Webcomic/Evil Inc}}
* ''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.)

* 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.

* ''Webcomic/ASimpleThinkingAboutBloodType'' is an anthology series that portrays the personifications of the four blood types and how they stereotypically react to various life situations. Type A is a law-abiding but considerate people-pleaser. Type B is carefree and outspoken. Type O is goal-driven but temperamental. Type AB is a rational individualist.

* ''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.
* The manga of ''Manga/CardcaptorSakura'' gives blood types for most (if not all) characters. Even the nonhuman ones.
* In ''Manga/TheCherryProject Chieri'' calls LoveInterest Tsuzuki a "Typical A" and he calls her a "Typical B" back.
* ''Anime/CowboyBebop'''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

* 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.
* ''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.
* ''Anime/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.

* Parodied in ''Manga/MedakaBox'', where ''every'' character has type AB.
* 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 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.

* Like many series, ''Manga/MyHeroAcademia'' shows little character profiles that include blood type. However, this is actually plot significant, since [[spoiler:blood type affects how long HeroKiller [[KnightTemplar Stain]]'s Quirk affects people]].
* ''Anime/{{Aggretsuko}}'' mentions that she is type A when she is introducing herself to the audience in both the first episode of the original shorts and the first episode of the Netflix series.

* Averted in South Korean girl group [[Music/{{Fx}} f(x)]]'s [[IncrediblyLamePun nu]] song ''NU ABO'', where it describes a completely different personality symbolized by a nonexistent blood type called ABO.

* ''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]]."

* ''VideoGame/CrazyTaxi'', at least in the manual.
* Each character in ''VideoGame/DeathSmiles'' has their blood type [[AllThereInTheManual listed in the manual]].

* 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.
* 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 SG ([[AlienBlood for Skullgirl]]), embalmed (for [[CuteGhostGirl Squigly]]), and B♭ (for Big Band).

* When ''VideoGame/StreetFighterII'' came out, character biographies included blood type.
* 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 the character will use should s/he appear in any other games in the franchise.

* ''Webcomic/ASimpleThinkingAboutBloodType'' is an anthology series that portrays the personifications of the four blood types and how they stereotypically react to various life situations.

* The cast page for ''Webcomic/SkinHorse'' includes blood types, including for the nonhuman characters[[note]]Sweetheart is [[https://www.merckvetmanual.com/dog-owners/blood-disorders-of-dogs/blood-groups-and-blood-transfusions-in-dogs DEA 1.1 negative]], Moustachio doesn't have any fluids, [[HiveMind Gavotte]] has hemolymph instead of blood, [[BrainInAJar Nick]] has a diesel ethanol blend, [[{{Animorphism}} Artie's]] is "variable".[[/note]] As far as regular human blood types go, Tip the [[ReallyGetsAround really-getting-around]] 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. Taken literally with Unity, whose personality ''is'' her blood; the [[MixAndMatchMan patchwork girl]] is just something to hold it.

* Parodied for Mog from ''VideoGame/FinalFantasyVI'' - his official listed blood type is "black-footed duck."
* Shockingly, Cloud Strife from ''VideoGame/FinalFantasyVII'' fits the AB blood type 'personality' almost to a T. Guess which blood type he is.

* 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 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. Taken literally with Unity, whose personality ''is'' her blood; the [[MixAndMatchMan patchwork girl]] is just something to hold it.

* ''Anime/AggressiveRetsuko'' mentions that she is type A when she is introducing herself to the audience in both the first episode of the original shorts and the first episode of the Netflix series.

[[folder:Anime & Manga]]

* 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: A --> more Agility but less Spirit, B --> [[GlassCannon more Attack but less Defense]], O --> more Defense but less Attack, and AB --> more Spirit but less Attack.

-->'''Utena:''' Himemiya, you're type-AB, right? Let's see, type-[=ABs=] are elusive and seldom reveal their true feelings, huh?\\

* [[http://evil-inc.com/2011/03/09/?post_type=comic Parodied]] in {{Webcomic/Evil Inc}}

* 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, Uranium, and acid. Not even two other human members can give expectable answers, as the old man is insane, and therefore cannot remember his blood type, and the necromancer, being {{Emo}}, says she's got pain for blood.

* Generally, shows up in promotional material for ''any'' {{JRPG}}. If this gets included in Western promotional, expect [[ValuesDissonance some head-scratching]], since in the West blood types don't have any significance attached to them.

* 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.

** Luffy is F (by extension, Jinbe too)

** Giorno Giovanni is the only Type AB main character, suiting his serious and introverted attitude.

* 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.

* Shockingly, Cloud Strife from ''[[VideoGame/FinalFantasyVII FF VII]]'' fits the AB blood type 'personality' almost to a T. Guess which blood type he is.

* Parodied for Mog from ''VideoGame/FinalFantasyVI'' - his official listed blood type is "black-footed duck."