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dei_shirou hakurei_reimu kochiya_sanae luna_child star_sapphire sunny_milk touhou

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The blonde fairy look stumped as hell.
Touhou fairies have a low IQ.
I believed that the Star is the smartest out of the 3.
Sanae's book says "joushiki" = common sense
xD
That's rather impossible to teach in the world of Gensokyo.