Adam appeared very egotistical and unsympathetic. As the leader of his Exorcist army, he took his stance as the Exorcists' head figure very seriously, sending antagonistic threats towards demons and anyone for standing in their way or whoever disobeyed his command. He also displayed traits of extreme narcissism and chauvinism, believing himself the perfect man due to being the first and claiming he had never made a mistake in his life, since he was the first man to be born on Earth, and he claimed that all the male bloodline came from him. He seemed to have a good relationship with Lute, whom he seemed to have in very high esteem, even though he was her superior. Despite his obliviousness, Adam did show moments of common sense and self-awareness. He also knew when to slow down on his egoism.

Adam was also quite cruel and sadistic, openly admitting in front of Charlie that he enjoyed killing demons, calling it entertainment, and tended to announce how many killed in the Extermination. He also dismissed Charlie's project of redemption not because he didn't believe in sinners being redeemed, because if she succeeded with that project he wouldn't be able to continue killing demons.

Despite his sadism and cruelty, Adam was capable of recognizing and praising the abilities of others.

If you could sound similar to his VA, Alex Brightman, that would be great, but it is not required!