Marines

Biodata

Appearance

• Described as young during a laboratory scene involving Kuma 287.
• Later described as a “very round Marine” when emerging from Future Island 605.

Personality

Sentomaru shows affection for Bonney despite her mischievous behavior. He and Kizaru sincerely smile at the sight of her happiness, appreciating that she has grown up healthy 315.

In the field, he prioritizes his assigned target over unrelated pirates. He also respects jurisdictional limits: on Sabaody Archipelago, he refrains from intervening because the local guards have priority enforcement authority over the Marines 429.

Abilities & Skills

Martial Arts

• Practices martial arts himself; the supplied passages do not identify specific techniques or establish his combat level 732.

Pacifista Command

• Commands PX-4 to stop the escaping Straw Hat Pirates before they can regroup in Area 23 377.
• Directs PX-5 during the pursuit of Dark Sun, ordering it to leave with him rather than waste time on other pirates 429.
• Uses shouted orders to control Pacifistas 732.

Scientific Expertise

• Although he serves in the Marine Science Unit, Austin explicitly assesses him as lacking technological knowledge. Austin attributes Sentomaru’s position to his good relationship with Vegapunk rather than scientific expertise 732.

Relationships

• Borsalino / Kizaru — His uncle. Both express happiness at seeing Bonney grow up healthy 315.
• Dr. Vegapunk — Maintains a good relationship with him; according to Austin, this connection helps explain Sentomaru’s position in the Marine Science Unit 732.
• Kuma — Appears alongside him in a laboratory scene 287.
• Bonney — Regards her mischievousness with affection and takes satisfaction in her healthy upbringing 315.
• Dotol Austin — Recognizes him as “Saint Austin” during the Sabaody confrontation and freezes with cold sweat when Austin stands before the Pacifista 377.

Story Role / Major Arcs

Laboratory and Bonney Scenes

• Appears as a young man in a laboratory where Kuma is also present 287.
• Later shares Kizaru’s sincere happiness over Bonney’s well-being 315.

Sabaody Pursuit

• Refuses to let the Straw Hat Pirates escape and orders PX-4 to intercept them. Austin’s appearance before the Pacifista interrupts the confrontation and visibly alarms him 377.
• During the later hunt for Dark Sun, abandons a potential confrontation with other pirates and departs with PX-5. Luffy, worried about being recognized, watches his departure in confusion 429.

Future Island

• Emerges from Future Island as a conspicuously round Marine 605.
• Is subsequently identified alongside Kizaru as a Marine Science Unit officer, with Austin criticizing the gap between their scientific posts and their actual technological knowledge 732.