Check for characters missing birthday info here.
January
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Maki Zenin
-
Mai Zen'in
February
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Suguru Geto
-
Utahime Iori
March
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Panda
-
Yuuta Okkotsu
-
Yuuji Itadori
April
-
Kasumi Miwa
-
Kiyotaka Ijichi
June
-
Noritoshi Kamo
July
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Kento Nanami
-
Momo Nishimiya
August
-
Nobara Kugisaki
September
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Aoi Toudou
October
-
Toge Inumaki
December
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Satoru Gojou
-
Megumi Fushiguro
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Toji Fushiguro