Check for characters missing birthday info here.
January
-
Haru Ichinose
February
-
Shiena Kenmochi
-
Tokaku Azuma
March
-
Ataru Mizorogi
April
-
Otoya Takechi
May
-
Mahiru Banba
June
-
Isuke Inukai
July
-
Suzu Shutou
-
Kouko Kaminaga
August
-
Sumireko Hanabusa
September
-
Chitaru Namatame
October
-
Hitsugi Kirigaya
December
-
Haruki Sagae