One Piece Encyclopedia

Hack (Fishman)

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Manga - Anime

Hack (Fishman) Anime Infobox

Japanese Name: ハック
Romanized Name: Hakku
English Name: Hack
Debut: Chapter 706;[1] Episode 633[2]
Affiliations: Revolutionary Army[3][4]
Occupations: Fishman Karate Instructor[5]
Fishman Jujutsu Martial Artist[5]
Epithet: "Hundredth Dan Hack" (百段ハック Hyakudan Hakku?)(Viz: Hundredth-Degree Hack)[6]
Gladiator Number: 0103
Japanese VA: Kōsei Hirota
This is about the fishman named Hack. For the human, see Hack (Human).

Hundredth Dan Hack is a fishman member of the Revolutionary Army.[4] He went to Dressrosa to investigate the arms trafficking there[4] and competed at the Corrida Colosseum for the Mera Mera no Mi[1].


Hack is a fishman, with yellow skin, that has brown spots on the upper part of his head, along with scales under his eyelids, sharp teeth, and gills on the sides of his neck. The fishman has a muscular stature, with long light blue flowing hair and a thick blue moustache.

Similar to Kuroobi, he wears an open gi with a black belt.

When he was transformed into a toy, he appeared to be shaped like a dog.


Hack Full Body
A full body view of Hack.
Hack as a Toy
Hack's appearance as a toy.


Hack seems to be a calm and proud person, and follows a dream where a path of friendship may be formed by fighting. For that reason, he will continue fighting.[7] He finds fighting battles to be honorable and thus, dislikes those who show a lack of respect toward a fight such as Bartolomeo. He is very honorable and dislikes attacking an opponent from the back, but he will do it if said opponent is not worthy of his respect, as he did to Bartolomeo, who was urinating on the side of the fighting ring and was, in Hack's opinion, not taking the battle seriously.[8]



He is a dear friend of Jinbe, and also shares the same dream - to have a friendship between humans and fishmen. However, the way differs between the two, as Hack stated that he wants it "by fists".[7]

Nico RobinEdit

Hack seems to have developed a friendly relationship with Nico Robin, who was rescued by the revolutionaries just prior to the timeskip. She greeted him warmly soon after meeting again in Dressrosa.

Revolutionary ArmyEdit


He seems to be working closely with Koala. He intended to get into contact with her after losing the Corrida Colosseum tournament but was unable to after he was turned into a toy by Sugar and forced to work.[3]


Hack also works closely with Sabo in the Revolutionary Army. However, he along with Koala, are occasionally at odds with him over his tendency to leave his post during missions.[9]

Abilities and PowersEdit

As a fishman, he is at least ten times stronger than an average human, and twice that in the water. However, as he is taking part in the Corrida Colosseum fights, a location in the New World, as well as from the demonstration of a high-level Fishman Karate attack, it is implied that Hack's much stronger than that.

He was able to stop an assault from a large gladiator by grabbing his opponent's spiked club, with the man commenting that he was unable to move his weapon in Hack's grip.[7]

Fishman KarateEdit

Main article: Fishman Karate

Hack is an instructor in Fishman Karate,[5] in comparison to Koala's status as assistant instructor.[10] He uses Fishman Karate to attack his opponents with great strength.[7][8]

Fishman JujutsuEdit

Main article: Fishman Jujutsu

Hack is a Fishman Jujutsu martial artist,[5] although he has not been seen using any techniques.



At an unknown time in the past, he became friends with Jinbe of the Royal Shichibukai .[7] He also became a member of the Revolutionary Army.

Dressrosa ArcEdit

Hack, Sabo, and Koala arrived at Dressrosa in order to put a stop to a weapons trade that the Donquixote Family managed.[4]

Hack entered the Corrida Colosseum to compete for the Mera Mera no Mi. For the battle royale, he was placed in Block B.[1]

After Block B's battle royale had started, one of the fighters taunted Hack for being a fishman, asking why a "freak" like him had entered a human tournament. Eyes closed, the fishman mused over how pitiful the man's statements were, remarking that they are nothing but the words of a puppet, and that if he wants to talk, he should at least do it with his fists. Enraged, Hack's opponent rushes forward and attacks him with a giant spiked club, which the fishman catches with one hand. As the man wonders why he can't move, Hack defeats him with Fishman Karate, sending him flying away. Hack then announces his desire to continue pursuing his dream of forming friendships through fighting, in the same spirit as his friend Jinbe.[7]

Bartolomeo Power

Hack attacks Bartolomeo's back before being defeated.

As he continued to defeat opponent after opponent with his Fishman Karate, Hack gained popularity from both the crowd and Gatz, who heartily cheered him on. When Bartolomeo began to pee over the side of the arena in front of the entire audience, Hack approached him, angrily commenting how there are people who were trying to fight seriously, and that he had no choice but to attack the Super Rookie from behind. As the crowd cheered him on, Hack unleashed his attack, only for it to be blocked by Bartolomeo's Bari Bari no Mi ability, which crushed the fishman's hand, severely injuring him. As the spectators and Gatz gape in confusion over what had just happened, Hack writhed in pain on the arena's floor, with the ferocious Bartolomeo leering over him.[8] Continuing what he had started, the vicious Super Rookie then finished Hack off with a brutal kick to the face.[11]

Sometime later, he was supposed to receive treatment for his injuries but instead, he was thrown in an underground dungeon filled with broken toys along with some of the disqualified participants. Hack commented that it was safe to assume that they won't be receiving medical treatment at all.[12]

After Ricky was revealed to be the former king of Dressrosa, Riku Dold III, Hack was seen secretly speaking with Koala by means of a Den Den Mushi.[13][3]

Hack was later seen in the underground trade port, having been transformed into a toy dog and forced to work. While moving crates, he complained bitterly that Koala was waiting for his report.[3]

When Sugar lost consciousness, Hack transformed back into his original form. He was then informed by Koala that Sabo was making his way to the basement.[14]

Revolutionaries in Dressrosa

Hack with Sabo and Koala

After Sabo and Koala arrived at the underground trade port through the surface, Hack was seen standing alongside them.[4]

After reacquainting with Robin, they later watched in shock as Doflamingo initiated his "bird cage" plan and created a "game" which gives the citizens of Dressrosa a choice to either kill him or a list of people he offers to them.[15]

Doflamingo announced his hit list, which includes Sabo, Robin, Rebecca, and Usopp. With Usopp's new followers turned against them, Hack, Koala, Sabo, Robin, Rebecca, Usopp, Bartolomeo, and the Tontatta dwarves fled from the mob.[16]

They (except for Sabo and Koala) later reached the colosseum stands. While Bartolomeo used his barrier against their pursuers, Hack noted that Sabo went off somewhere.[17]

They eventually arrived at the top of the old King's Plateau where they met up with Riku Dold III, Viola, and Tank Lepanto.[18] Hack remained with King Riku, Viola, and Usopp while Rebecca, Bartolomeo, Leo, Kabu, and Rebecca headed for the new King's plateau to find Luffy and the rest of the dwarves headed for the SMILE factory.[19]

The group on the old King's plateau were later joined by Kin'emon and Kanjuro.[20]

When the Dressrosa citizens reached the top of the plateau with the intent to capture King Riku and Usopp, Hack held them back long enough for Usopp to snipe at Sugar.[21]

Major BattlesEdit


  1. 1.0 1.1 1.2 One Piece Manga and Anime — Vol. 71 Chapter 706 and Episode 636.
  2. One Piece AnimeEpisode 633, Hack makes an early appearance in silhouette after Lucy defeats Spartan.
  3. 3.0 3.1 3.2 3.3 One Piece Manga and Anime — Vol. 74 Chapter 737 (p. 16) and Episode 669, Hack reveals that he has ties with Koala of the Revolutionary Army.
  4. 4.0 4.1 4.2 4.3 4.4 One Piece Manga — Vol. 75 Chapter 744.
  5. 5.0 5.1 5.2 5.3 One Piece Manga and Anime — Vol. 71 Chapter 707 and Episode 636.
  6. One Piece Manga — Vol. 71 Chapter 707.
  7. 7.0 7.1 7.2 7.3 7.4 7.5 7.6 One Piece Manga and Anime — Vol. 71 Chapter 707 and Episode 637.
  8. 8.0 8.1 8.2 8.3 8.4 One Piece Manga and Anime — Vol. 71 Chapter 708 and Episode 637.
  9. One Piece MangaChapter 760.
  10. One Piece Manga and Anime — Vol. 73 Chapter 731 (p. 18) and Episode 663, Koala's infobox.
  11. 11.0 11.1 One Piece Manga and Anime — Vol. 71 Chapter 709 and Episode 638.
  12. One Piece Manga and Anime — Vol. 73 Chapter 725 and Episode 657.
  13. One Piece Manga and Anime — Vol. 73 Chapter 726 and Episode 658.
  14. One Piece Manga — Vol. 75 Chapter 743.
  15. One Piece Manga — Vol. 75 Chapter 745.
  16. One Piece Manga — Vol. 75 Chapter 746.
  17. One Piece Manga — Vol. 75 Chapter 747.
  18. One Piece Manga — Vol. 75 Chapter 750.
  19. One Piece MangaChapter 755.
  20. One Piece MangaChapter 756.
  21. One Piece MangaChapter 758.

External LinksEdit

  • Dan: Wikipedia article about the meaning of Hack's epithet.

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