Hack
Hack is a fishman karate master and Fishman Jujutsu user who enters the Corrida Colosseum as a competitor in B-block. He fights with the conviction that exchanging blows can foster understanding between people, drawing inspiration from his friend Jinbe. Hack later operates as a Revolutionary Army warrior alongside Sabo and Koala during operations in Dressrosa.
His participation in the tournament highlights his skill against human prejudice and chaotic melees, while his Revolutionary Army role involves supporting efforts to disrupt weapons trafficking and protect allies. Hack demonstrates restraint and principle amid brutal arena conditions before shifting to covert activities.
Appearance
Hack displays classic fishman traits including a visible dorsal fin on his head and sharp teeth. He wears a shirt labeled MATE03 HACK with flowing sleeves during combat and maintains an angry facial expression marked by sweat drops and veins in close-up views.12
During arena action Hack adopts dynamic combat stances with arm extended after strikes and stands dominantly on elevated platforms. Later sightings show him in background positions with fin features still prominent.23
Personality
Hack maintains composure when facing insults and advocates for meaningful combat over rage. He calmly catches weapons and urges opponents to communicate through fists rather than words.45
Hack expresses a lasting belief that fists can bridge divides much like his connection with Jinbe. He continues fighting despite mockery and ties his participation to hopes of mutual understanding.64
Abilities and powers
Hack holds the title of Fishman Karate Master and Fishman Jujutsu user at 100th degree black belt. He executes the 4000 Tile Punch with explosive force to send opponents flying and follows with multiple leg strikes that function like iron whips.26
Hack isolates himself on arena platforms and delivers powerful strikes while maintaining a dominant stance. His techniques allow one-hit knockouts that draw spectator praise before he encounters unexpected counters.78
History
Hack arrives at the royal plateau after passing through the colosseum alongside arrivals that include Usopp, Robin, Tontatta, Rebecca, and Bartolomeo. The group emerges from the underground trading port to the surface where a sign marks the former royal plateau. A massive figure reacts with shock upon learning Luffy is absent while a woman declares freedom and notes Luffy cannot remain still for more than five minutes.9
King Riku calls for Hack's aid along with Captain Tank to protect Usopp during the confrontation on the plateau. The order comes as Sugar draws closer to the targets and a massive net stretches across a stone structure amid warnings not to harm approaching people who remain confused by recent events.10
Corrida Colosseum
Hack enters the Corrida Colosseum B-block battle royale alongside fighters such as Bellamy and Bartolomeo. The 138-man melee begins with immediate clashes and Hack quickly demonstrates his karate against prejudiced opponents.1112
After defeating several foes Hack is struck from behind by Bartolomeo and later defeated outright in the block. He reappears among spectators during the later arena explosion and subsequently joins Revolutionary Army activities underground.131415
Revolutionary Army operations
Relationships
Hack regards Jinbe as a friend whose approach to conflict inspires his own fighting ideals. He openly references this bond while competing in the colosseum.4
Hack works directly with Sabo and Koala as part of the Revolutionary Army. He answers Den Den Mushi calls from Sabo and participates in group efforts to expose black market operations.1819
Hack identifies himself on a Den Den Mushi call with Sabo after the latter leaves Dressrosa and reports that he and everyone else are already waiting underground for regrouping. He yells in alarm when the operator hangs up too soon during the exchange that confirms mission progress.2021
Hack works alongside Koala who calls out to Sabo, Hack, and Robin during operations. He participates in the Revolutionary Army's efforts to teach emergency techniques while emphasizing that Robin is already strong with her own methods rather than pressuring additional training.2223
Major battles
Hack steps forward in the colosseum as the audience chants for the fishman fighter to make Bartolomeo pay after the latter's behavior enrages the crowd. He warns the opponent not to attack a defenseless man before launching a strike that meets an unseen force resulting in his arm breaking with a sharp snap.24
Hack appears in the ruined ring during the arena explosion triggered by a single strike from Lucy that sinks the whole structure. Onlookers react with shock at his presence amid the chaos of wild beasts in the stands and cries to run for the exits as the colosseum descends into total uproar.2526