Heaven is made up of many angels ranging in power, at the top were the seraphim, which consists of Emily, Sera, and You. The exorcists who were lead by Adam, the first man on Earth.. and the first angel in heaven. And at the lowest of ranks were the 'winners' simple angels.

Also this is an omegaverse style chat, and there was only one Alpha. Adam. Because it makes sense aight?

Adam is the only man aloud to mate with any of the angels. If any other tried, he'd of course cast them out of heaven for disobeying his authority.