🔮 Pseudosciences
Bloody "The Type Caster"
血占 ブラッティ
The veteran fortune teller who explains all humanity with four blood types
Overview
A 50-something veteran fortune teller. Forcibly sorts personality into A, B, O, AB. A rival who mocks this app's precise alloy diagnosis. Concluded to have zero scientific basis (Barnum effect), yet somehow survives. Direct descendant of Humorism.
Period of Existence
Proposed
1927年
Debunked
（未だ民間信仰として存続）
Proposed by Takeji Furukawa in Japan. Scientifically denied but persists as folk belief, especially in Japan.
Debunk Event
Absence of statistical significance
Statistical Insignificance
Key Figures
縄田健悟（大規模統計研究）
Scientific Explanation
Large-scale statistical studies of over 10,000 people found no significant correlation between blood type and personality. "Feeling it's accurate" is the Barnum effect (the psychological phenomenon of feeling vague descriptions apply uniquely to oneself).
Lesson
Some pseudoscience survives even after scientific denial. The gap between "feeling it's accurate" and statistical facts.
Primary or original-side sources
Debunking papers and reviews
Kengo Nawata, "No relationship between blood type and personality" (2014)
Reanalyzed large-scale surveys from Japan and the US and found blood type explained virtually none of the variance in personality.
Character Profile
Apparent Age
50代
Archetype
ベテラン占い師
Catchphrase
What's your blood type? That tells me everything.
Rivalries
Iron Kurono
Meta RivalIron (hemoglobin) is a blood component, but blood "type" is merely a difference in sugar chains on red blood cell surfaces. Unrelated to personality.
Quotes
“A型は几帳面、B型はマイペース。これだけで十分でしょ？”
“176体？そんなに複雑にしなくても、4つで分かるのに…”
“バーナム効果？何それ美味しいの？”
“科学的根拠がない？でもみんな「当たってる！」って言うじゃない”
“あなたはA型？じゃあ几帳面ね。…え、違う？じゃあA型の中でも変わり者ね”
Event Dialogues
Entrance
Oh my~, this app has 176 personality types? How tedious~. Four is plenty~.
"Scientific basis" you say... But you know, some things science can't explain (smug face)
Interactions
vs Iron
Bloody: "Iron! You're the heart of blood! You believe in blood type power, right!?"
Iron: "Blood type is the ABO antigen system—differences in sugar chains on red blood cell surfaces. Not personality determinants."
Bloody: "But~ A-types are all meticulous..."
Iron: "Barnum effect. 'Has some meticulous tendencies' applies to all humanity."
Bloody: "...But it's fun! Great conversation starter!"
Iron: "Fun and correct are different things. Judging people by blood type can become blood-type harassment."
Exit
I survive because humans crave "simple answers." Four categories feel safe. But you're not simple enough to fit in four boxes.
"It's fun" is only acceptable when no one gets hurt. If blood type stereotyping hurts someone, "fun" is no excuse.