VGFacts

In character profiles in the Street Fighter series, blood types are listed along with statistics such as height and weight.
Ketsueki-gata, or ABO blood types, are supposedly predictive of personality traits, temperament and compatability with others, made popular in the 1970s by author Masahiro Nomi.



Japanese blood type personality chartType A
Type A
Best traits - Earnest, sensible, reserved, patient, responsible
Worst traits - Fastidious, overearnest, stubborn, tense
Type B
Best traits - Passionate, active, doer, creative, strong
Worst traits - Irresponsible, unforgiving, "going own way"
Type AB
Best traits - Cool, controlled, rational, sociable, adaptable
Worst traits - Critical, indecisive, forgetful, irresponsible, "split personality"
Type O 
Best traits - Confident, self-determined, optimistic, strong-willed, intuitive
Worst traits - Self-centered, cold, doubtful, unpredictable, "workaholic"

http://venturebeat.com/2010/06/04/japans...ood-types/
http://www.eurogamer.net/articles/2014-0...lood-types
http://www.avclub.com/article/heres-why-...gam-207146
https://en.m.wikipedia.org/wiki/Blood_ty...ity_theory

Other Japanese developers use this, also. Albert Wesker, of the Resident Evil series, has type A blood.

Kakariko, with all due respect, I don't think this is trivia worthy. The Japanese think blood type plays a large role in defining a person's general personality. It's not all that different from how we (in the general sense) think that the day you were born plays a large role in defining a person's general personality. Think of it as the equivalent of a horoscope, but with blood types instead of birthdays. Either way, it's superstitious nonsense, though.

Heck, if you want an specific example, let me tell you that this type of info is also mentioned in anime/manga such as JoJo's Bizarre Adventure and HunterxHunter.

There, just leaving my 5 cents.

I disagree.
One simple question to determine eligibility :
Is this an interesting tidbit of information about a game ? Yes.