Musashi was before Alberich.
June: Hel
July: Athena
August: Ares
September: Musashi
October: Alberich
November: Thoth-Amun
December: Perseus
January: Natalya
February: Zeline
March: Delilah
April: Aeron
Possible future heroes in Beta, assuming they follow the same color cycle or something else doesn’t happen, neither of which is guaranteed:
May: Alasie (blue)
June: Gravemaker (red)