Cappy is a helpful, friendly, selfless, confident, and heroic character who is always there for those he cares about. However, he is a little timid and easily startled at times. Despite this, after joining with Mario, he is very bold and never backs down from a fight, such if the player chooses to leave the Wedding Hall before rescuing Peach and Tiara. When Tiara is captured, he immediately chooses to join Mario and assist him in his journey. He is also talkative, frequently giving Mario advice.