Check for characters missing birthday info here.
January
-
Kiri Mukae
February
-
Hiyo Yukino
March
-
Sasame Mitsukuri
-
Haru Chitose
May
-
Sarasa Ryuuou
June
-
Miku Nishio
July
-
Hanako Yamadagi
August
-
Shupe Gushiken
September
-
Eri Kumagai
October
-
Roro Morooka
November
-
Kotoko Kintoki
December
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Uori Mukae