Dwyer is normally seen competing against his father in some form or manner. Although lazy and apathetic, his motto is "work before rest". He hates being ordered around by others, but when he is left alone, he takes care of chores splendidly. He is a naturally skilled butler and combatant. His specialty is brewing coffee, something that Jakob and his mother admits is better than Jakob's own specialty brew.

Similar to his father, Dwyer strongly wishes to serve the Avatar as his butler. During their support conversations, Dwyer always heavily hints of how he would be a better butler than his father and how the Avatar should employ him instead. His supports with Jakob and Asugi reveal that he's a master at hand-to-hand combat, but he considers this talent to be virtually useless against enemies with weapons. Due to Jakob's hellish combat training while he was a child, even without training he's able to retain all of his fighting skills.

Compared to Jakob, Dwyer is noticeably more considerate towards others. Many of his supports show how he takes care of others purely out of instinct, such as adding cardamom and cinnamon to Nina's tea after noticing that her voice was a little hoarse. Though overly blunt at times, he's also quite gentlemanly towards women. He has a strong no-nonsense personality, however, when it comes to cleanliness, manners, etiquette, and overall common sense. His supports with Kiragi show that he has strong "butler instincts" and that he refuses to take any nonsense from nobles, both of them traits passed down from his father. He also feels very uncomfortable when others call him a kind person. While he is very lazy, he does not see caring for his friends as work.