Adam/History

Past
Adam, along with Lilith, were the first humans created on Earth by the Angels, made to be equal. However, Adam wanted total control over Lilith, but Lilith refused and left him. Adam would later be given a new wife, Eve.

At some point, Adam received divine ordainment and become an angel, then would suggest the Extermination to Sera, which she agreed to, and he become the leader of his own military, the Exorcists.

"Overture"
Adam and Lucifer were set to meet in the Heaven Embassy, but Lucifer sent Charlie to meet with him instead. When they meet, Adam messed with Charlie twice; offering a handshake even though he was a hologram, and offering food when the food is also a hologram.

He wasted discussion time talking about his activities in Heaven until Charlie finally talks about having a solution to their "biggest problem", which is the overpopulation crisis in Hell. Charlie tries to explain her plan on rehabilitating Sinners, but Adam mocks the idea in a song and then states how he and the other Angels have moved the Extermination to take place six months early because he "couldn't wait a whole year to slaughter demons". He then shoves Charlie out the door.

Later, he sits in a room watching a drone look for a deceased Exorcist, and once found reveals that in six months they intend on killing every Sinner to make sure there is none left alive to kill another Exorcist again.

"Welcome to Heaven"
During Charlie and Vaggie's visit in heaven, he and Lute recognized Vaggie and paid her a visit. He asked her to work with him during the hearing at the court or he would reveal her true origins to Charlie.

During the hearing, he was asked how human souls ascend, fumbling for a while before handing a paper with three directives. While observing, he held his position that sinners can't be redeemed despite Angel dust's actions completing the three directives he had set out. During the debate, he accidentally revealed the extermination to the court, and then revealed Vaggie's true nature to Charlie, shocking her. After the court ruled that sinners cannot be redeemed, Adam threatened Charlie that during extermination he would attack her Hotel first.

"The Show Must Go On"
On extermination day, Adam launched the attack on the Hotel first, as he previously threatened. He was shocked to see that the demons were using their own weapons against them. Angered and annoyed, he proceeded to destroy Alastor's shield and engaged the latter. After a brief confrontation he managed to seriously injure the Overlord, forcing him to flee from the battle.

Adam then attacked the demons, vaporizing Sir Pentious and his blimp. He is then attacked by Charlie but manages to gain the upper hand, but before he could strike a decisive blow, he was attacked by Lucifer, who easily defeated him.

Despite being badly injured, he still got up and berated Charlie and her companions. He rants, going how he started all of mankind and everything else on Earth and everybody should be worshipping him, only to be stabbed in the back by Niffty, fatally wounding him. In his final moments, he smiled at Lute.

Lute brings Adam's halo to Lilith, who is lounging on a beach in Heaven.