|Photo Credit by ACWart|
As a child, he had significantly shorter hair and a rounder face. His hair was also combed into a pompadour in the front, with his braid in the back. His attire was a less elaborate shirt and bow tie. His teeth also lacked the dark markings that make them resemble piano keys.
After the timeskip, he wears a set of black headphones, and changed to a different garb that has the kanji moved to the right side of his pants, ropes as buttons for the shirt, and epaulets on his shoulders. Apoo seems to be a passive individual who would not seek to harm others without a good reason. As a result, he is normally defensive during confrontations as seen in his postponed brawl with Eustass Kid at a Sabaody Archipelago bar. Despite this, Apoo can be very ambiguous at times, meaning he cannot deny himself as audience to a good brawl, should the opportunity present itself. When facing an opponent that's too strong for him, he prefers to run away. However he enjoys provoking and taunting his enemies before leaving. He also proved to be quite perceptive, since he claimed to have sensed an immense murderous intent momentarily emitted by Roronoa Zoro, shortly before Zoro attempted to attack the World Noble Saint Charloss after the latter attempted to shoot the former.
He hates it when someone tells him the obvious, such as when a crew member stated that the crew was running in the air, while they were running away from a pack of savage boars in the New World.
After the timeskip, Apoo seems to have become very cautious, believing that when summoned by an enemy he should be ready to fight, and when Killer invited him to discuss the possibility of an alliance, Apoo believed Kid to be hiding a sniper, which resulted the On Air Pirates captain to wreak havoc on Kid's base and attacking one of his crew members.
Scratchmen Apoo is a martial artist of sorts. His fighting stance generally consists of him waving his hands in front of him like a DJ. Not much is currently known about his abilities, as he has not demonstrated any fighting skill to the extent of the other Supernovas, save for his brief brawl with Eustass Kid, where the two caused a building to tumble down and his attack on Admiral Kizaru. Apoo displayed acrobatic jumping skills on both occasions.
Apoo appears to have a Devil Fruit connected with music. This ability, which he refers to as Tatakau Music (戦う音楽 (たたかうミュージック) Tatakau Myūjikku?, literally meaning "Fighting Music"), allows him to transform his body into various musical instruments (such as piano keys on his teeth or turning his arm into a saxophone) which he can play. By playing specific notes and tunes, he can release music that causes damaging effects to his opponents, the type of damage being determined by what he plays, and seems to have hypnotic effects. Apoo can turn into instruments in seconds.