Adam appears very egotistical and unempathetic. 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 (despite his controlling attitude being what ruined his relationship with Lilith). Given his stance as the Exorcists' head figure, he takes an antagonistic stance towards demons for unknown reasons. He’s also kind of an idiot, and often uses sarcasm to express himself.