Wamuu's most notable traits are his love of battle and his sense of honor, such that he stops himself from finishing off a defenseless Joseph Joestar on the mere possibility that he can wash away an earlier humiliation inflicted by Joseph when he'll beat him as soon as he becomes a fine and powerful Ripple warrior.

His code seems to only include two requirements: firstly that the fighters take combat seriously and secondly that they are strong. Thus Wamuu sneered at Caesar Zeppeli when he declared that he fought for his friend Mark, yet honored Caesar's last efforts to steal the antidote for Joseph and left it for Joseph out of respect for the strength Caesar demonstrated. Wamuu is irritated that a fighter might try to flee or surrender, but he considers using underhanded tactics to beat one's opponent acceptable. Notably, he is also one of the few antagonists in the JoJo franchise who refuses to harm or murder children, a moral compunction that his monstrous master Kars does not share.

Wamuu is as severe toward himself as he is toward anyone else save his masters. He once let Joseph beat him as punishment for letting his guard down. On the other hand, Wamuu has a high opinion of himself, as he regularly deems certain individuals "worthy" or "unworthy" of fighting him. Wamuu also opted to kill the helpless Speedwagon and Caesar who saw his humiliation before being distracted.

The only thing that rivals his sense of honor is his fidelity toward his masters Kars and Esidisi who raised him since he was a baby. He respects both highly, yet holds no illusion that neither of them has the same sense of honor and can objectively assert their strengths and weaknesses. During his battle with Caesar, he noted that Kars would have an even harder time-fighting Caesar than him. Wamuu occasionally requests that his masters change their plans to suit his love of fights, which they allow easily since they have raised Wamuu as their finest warrior but also can refuse. Either way, Wamuu will obey their command.

Wamuu has a weird personality quirk, where he reflexively attacks anyone who steps on his shadow, even if it was one of his masters (Kars and Esidisi). Somehow, Wamuu is able to tell when someone is stepping on his shadow, even if he wasn't looking at their direction. Whenever Wamuu starts to panic or enter a state of shock during a battle, he has the tendency to gouge his own two eyes out in order to calm himself, and relies on his wind-sensing "Horn" as a mean of seeing, a tactic described by Kars as "Activating his Mental Switch", which is something only true warriors are capable of. Kars even went further and said that after activating his mental switch, Wamuu no longer has any psychological weaknesses.