History Main / PersonalityBloodTypes

* Is the whole theme of the Japanese song ''[[https://m.youtube.com/watch?v=T3jtyZOqCtk Blood Type Hamburger Shop,]]'' each verse featuring an employee [[ThePerfectionist exe]][[BoisterousBruiser mpl]][[DitzyGenius ify]][[TheGadfly ing]] each blood type taking the orders of [[ButtMonkey an unfortunate customer]]. Curiously, the verse for AB heavily downplays the "coolheaded" and "rational" bit despite mentioning it in-song, and is played more like an AbsentmindedProfessor. Like many things, it is a subject of heavy MemeticMutation on Website/NicoNicoDouga, with many videos in various fandoms being created, matching up the characters with their corresponding blood type personality.

* Discussed in the ''WesternAnimation/MiraculousLadybug'' episode "Ikari Gozen". During the scavenger hunt, Kagami asks what Marinette's blood type is, expressing surprise when the latter doesn't know. Kagami then explains that she's a type O, and therefore is independent, optimistic, strong-willed, and intuitive. She then reasons that Marinette must be [=AB=], based on her indecisive nature.
* It's blink and you'll miss it, but in the first episode of ''WesternAnimation/{{Futurama}}'', ''just'' before Fry is about to get his career chip put in the first time, you see some of his info on a screen, where you can see that his blood type is B. Given his [[KindheartedSimpleton friendly and sunny if ditzy nature]], it fits him well.

* Discussed 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.

%%* 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.

%%* 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.

** Zigzagged with Yugi Moto, who has type AB Negative blood. Cool, controlled and unforgiving 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.

%%* {{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.

%%* 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 the first episode of the Japanese DefectiveDetective show ''Kiina'', the title character becomes convinced that a man committed a murder despite him not matching the blood type found at the scene because his personality doesn't match the blood that was drawn from him for comparison. The other detectives think this is ridiculous, but she turns out to be right. He was a doctor, and inserted a tube of someone else's blood into his arm so the blood could be drawn from that..

->''I'm such an optimist that my doctor told me my blood type was [[{{Pun}} B Positive]].''

[[folder:Film]]

* 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 blood type to justify his glib antics. A disclaimer immediately appears, stating that personality have nothing to do with blood types.

* Is the whole theme of the Japanese song ''[[https://m.youtube.com/watch?v=T3jtyZOqCtk Blood Type Hamburger Shop]]'', each verse featuring an employee [[ThePerfectionist exe]][[BoisterousBruiser mpl]][[DitzyGenius ify]][[TheGadfly ing]] each blood type taking the orders of [[ButtMonkey an unfortunate customer]]. Curiously, the verse for AB heavily downplays the "coolheaded" and "rational" bit despite mentioning it in-song, and is played more like an AbsentmindedProfessor. Like many things, it is a subject of heavy MemeticMutation on Website/NicoNicoDouga, with many videos in various fandoms being created, matching up the characters with their corresponding blood type personality.

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

* Type A
** Best Traits: Earnest, sensible, reserved, patient, responsible, cautious.
** Worst Traits: Fastidious, overearnest, stubborn, tense, obsessive, and pessimistic.
* Type B
** Best Traits: Passionate, active, creative, animal-loving, flexible, cheerful, optimistic.
** Worst Traits: Irresponsible, forgetful, selfish, lazy, impatient, unreliable, and "going own way."
* Type AB
** Best Traits: Cool, controlled, rational, sociable, adaptable, intelligent.
** Worst Traits: Critical, indecisive, unforgiving, two-faced, aloof, and "split personality."
* Type O
** Best Traits: Confident, self-determined, ambitious, strong-willed, intuitive, agreeable, competitive, athletic.
** Worst Traits: Self-centered, cold, aggressive, unpredictable, arrogant, envious, and ruthless.

It's common in any series where it's AllThereInTheManual to list the blood type of all the characters. Incidentally, the practice started as a type of pseudo-scientific propaganda: One group of people rebelled against invasion while another simply accepted the invaders. Since the two groups had different blood-types, the army doctors simply claimed that it was their blood-types making them rebel, rather than accept that just maybe, most people don't ''like'' having their country invaded. Interestingly, there used to be machines in public places which would tell your blood type, but they were removed after the health issue associated with shared needles became more apparent.

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