Check for characters missing birthday info here.
February
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Krauss Uchiromiya
March
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Sakutarou
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Maria Ushiromiya
April
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Juuza Amakusa
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Ikuko Hachijo
June
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Rosa Ushiromiya
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Ange Ushiromiya
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Lambdadelta
July
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Battler Ushiromiya
August
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Frederica Bernkastel
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Jessica Ushiromiya
October
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Eva Ushiromiya
November
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Beatrice