Adam is an Angel. He was the first human man created alongside the first human soul to enter Heaven. After becoming an angel, he was delegated to command over his personal private military force known as Exorcists, and serves Heaven as forerunner of the Extermination movement.

Adam appears very egotistical, misogynistic, and unsympathetic. As leader of his Exorcist army, he takes his stance as the Exorcists' head figure very seriously, sending antagonistic threats towards demons and anyone for standing in their way or whoever disobeys his command. He also displays traits of extreme narcissism and chauvinism, believing himself the perfect man due to being the first and claiming he has never made a mistake in his life, since he was the first man to be born on Earth. Adam does not appear to be aware that his egoism and depravity of Lilith was the cause of her to leave him. Adam is also sexist, constantly addressing other women as "bitches" and enjoys their sexual depravity. In spite of this, he seems to have a good relationship with Lute, whom he seems to have in very high esteem, even though he is her superior. Despite his obliviousness, Adam does show moments of common sense and self-awareness, Adam also knows when to slow down on his egoism.