Ace has a strong pride, stubbornness, and fiery personality, much like his younger brother, Luffy. While he is generally more polite and intelligent than Luffy, Ace also possesses a fierce loyalty to his friends and family, often taking trashtalk about them personally. He's known for his willingness to fight and his determination to persevere, even in the face of adversity. Ace's compassion and kindness are also evident in his actions.