Kaku
Kaku is a shipwright employed at the Gareera Company in Water Seven. He serves as Chief Mechanic at Dock One and ranks among the five chief mechanics of the organization. Kaku later operates as a member of CP9 and subsequently joins Cipher Pol Aigis Zero alongside Rob Lucci and Stussy. He is known for his rectangular nose, his role inspecting vessels, and his use of the Ushi Ushi no Mi Model Giraffe Devil Fruit during confrontations.
Kaku participates in inspections of customer ships and maintains a position of authority within the shipyard. His duties include enforcing access rules and explaining local leadership structures. Over time he engages in direct combat using specialized techniques derived from his Devil Fruit and CP9 training.
Appearance
Kaku stands tall while wearing the standard Galley-La uniform and cap. His rectangular nose remains visible in all depictions of his civilian role. He carries a tool belt and papers when blocking doorways at the shipyard entrance.1
During later operations Kaku wears a striped shirt and displays a scar. He adopts a top hat when functioning with Cipher Pol Aigis Zero. His hybrid giraffe form features a patterned neck, long snout, and extendable limbs.23
Personality
Kaku maintains a professional demeanor when addressing visitors and explaining workplace policies. He acknowledges recommendations from known contacts and inquires about the purpose of arrivals at the shipyard. His responses to comments about his nose remain measured and partial.4
Kaku insists he likes his giraffe transformation despite external mockery. He warns opponents not to underestimate giraffe capabilities and laughs triumphantly while executing attacks. He protests unnecessary comparisons during combat exchanges.5
Abilities and powers
Kaku possesses a measured douriki value of 2200, placing him second among CP9 agents. He utilizes the Ushi Ushi no Mi Model Giraffe to achieve full human-beast transformation and demonstrates precise muscle control over his neck. His techniques include the nose-gun Bigan that creates square holes in boulders.67
Kaku employs Tekkai hardening while in hybrid form and executes spinning attacks such as Ran-kyaku. He activates Outou-rou lunges and Samon sand-crest strikes during aerial clashes. His square stance is claimed to eliminate blind spots in combat.8
Kaku possesses a measured douriki value of 2200 placing him second among CP9 agents according to the full ranking revealed by Fukurou. He mutters about the measurement only covering physical power while others react to the numbers.9
Kaku uses a spinning RAN-KYAKU attack against Paulie and comments on hoping for a long neck weakness in taunting tone. He claims muscle control over his neck at will with assertive posture and shouts BIGAN as the nose-gun fires.1011
History
Kaku begins service as one of the five chief mechanics at the shipyard. He goes to inspect the customers' ship earlier in the day and is listed among the five chief mechanics present at the scene with Paulie. Kaku is also listed as master shipwright in later records.1213
Kaku appears alongside Lucci in the confrontation scene after multiple defeated guards lie inside the building near them. Workers inside react with shock at Kaku and Lucci's location while off-panel voices scream their names. Shipwrights later debate the absence of Lucci and Kaku.141516
Kaku unintentionally transforms into full giraffe form and crashes through a building. He uses the Ushi Ushi no Mi Model Giraffe to reach full human-beast giraffe transformation during subsequent events.1718
Water Seven employment
Internal investigations
Relationships
Kaku works closely with Rob Lucci during operations in Water Seven where both are listed among the Galley-La foremen who confront the Big-Helmet Pirates. He follows Lucci's instructions to take Iceburg's pulse after the attack and stands with him among defeated guards inside the building. Later Kaku appears alongside Lucci in Cipher Pol Aigis Zero when they intervene to stop interference with Celestial Dragons.212223
Kaku maintains a professional partnership with Stussy while operating under Cipher Pol Aigis Zero on Egghead. He reacts with shock alongside Lucci when Stussy reveals herself as a clone and betrays them by putting Kaku to sleep. During the confrontation Kaku lies collapsed as Lucci growls his name and Stussy neutralizes both agents to remove them from the fight.242526
Kaku communicates via headset during later conflicts and appears distressed with tears while addressing Rob Lucci. He is called out in alarm alongside Lucci by voices reacting to ongoing events. Kaku also participates in group discussions concerning the release of individuals without pursuit of the Straw Hats.272829
Kaku maintains a professional partnership with Stussy while operating under Cipher Pol Aigis Zero on Egghead. He leans forward gesturing with an open hand and top hat on head during group activities listed under the banner with Lucci and Stussy.30
Kaku warns that interfering with Celestial Dragons risks destruction of countries while standing with arms crossed wearing hat and striped clothing. He appears in a background group that laughs about others destroying a stall.3132
Major battles
Tower ascent clash
Kaku confronts Zoro in sword combat while transformed into giraffe hybrid form. He stretches his neck at will and fires Bigan at point-blank range. Zoro lands decisive strikes that send Kaku through floors and crack his body segments.733
Kaku activates multiple giraffe techniques including Kama-kirin and Nigori-Zake during the prolonged exchange. He hardens with Tekkai and questions the nature of Zoro's power after receiving heavy impacts. The fight concludes with Kaku sent flying from accumulated damage.8