As the head of Phillips Broadcasting, Duke shows many traits typically associated with business villains such as a willingness to retool anything (often Jay's show) for profit, being corrupt, and acting like an evil overlord. He is shown to have incredible strength and physique, such as walking right through two walls and throwing Jay like a medicine ball during an exercise routine. He also bullies his employees, notably Jay whom he frequently antagonizes for allegedly being gay and into him (Jay isn't and Duke later reveals that he does it just to bully him) which didn't stop even when Jay started dating his second season girlfriend Alice Tompkins.