Check for characters missing birthday info here.
January
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Hirano Hasegawa
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Hirano Hasegawa
February
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Opera Kobayashi
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Opera Kobayashi
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Henriette Mystere
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Arsene
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Henriette Mystere
March
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Sherlock Shellinford
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Sherlock Shellinford
April
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Saku Tooyama
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Saku Tooyama
May
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Kokoro Akechi
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Kokoro Akechi
June
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Jiro Nezu
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Jiro Nezu
July
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Twenty / Kai Nijuuri
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Twenty / Kai Nijuuri
August
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Nero Yuzurizaki
September
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Tsugiko Zenigata
October
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Hercule 'Elly' Barton
November
December
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Cordelia Glauca
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Cordelia Glauca