Scratchmen Apoo, captain of the On Air Pirates and a Longarm Tribe member, carves his infamy as a key figure among the Worst Generation, branded by his epithet "Roar of the Sea." With a 350,000,000 Beli bounty, his notoriety stems from cunning allegiances—secretly serving as an informant and subordinate to Kaido’s Beasts Pirates, a hidden loyalty pivotal to his schemes. Empowered by the Oto Oto no Mi, a Paramecia-type Devil Fruit, Apoo morphs his limbs into instruments, unleashing destructive sound waves that trigger explosions or slashes. These attacks strike all within earshot, their potency nullified only by blocking auditory exposure. During the Wano Country arc, he exploited this ability to ambush Luffy and Zoro before Eustass Kid countered his onslaught. At Sabaody Archipelago, Apoo’s tactical acumen surfaced as he postponed conflict with Kid to evade Marine scrutiny. Later, his sound waves briefly staggered Admiral Kizaru during the chaotic skirmish, though defeat followed swiftly. Post-timeskip, he feigned alliance with Kid and Basil Hawkins to oppose the Four Emperors, only to betray them by exposing his prior servitude to Kaido. In *Stampede*, Apoo joined the Pirates Festival on Delta Island, braving the Knock Up Stream to pursue Gol D. Roger’s legacy. Collaborating with fellow Worst Generation members, he confronted Douglas Bullet, whose awakened Devil Fruit prowess overwhelmed them. Apoo narrowly escaped the ensuing Marine siege through allied aid. Throughout Wano, Apoo’s duality shone: orchestrating beats as the Beasts Pirates’ Fire Festival DJ while clashing with the Ninja-Pirate-Mink-Samurai Alliance. His opportunistic betrayals and calculated chaos cement his role as a mercurial yet formidable antagonist, leveraging shifting loyalties to navigate the turbulent seas of power.