Hina isn't a Marine captain in 'One Piece'—she's actually a rear admiral, which is even higher in rank! I love how Oda plays with power dynamics in the series. Hina's got this cool 'Cage-Cage Fruit' ability that lets her trap people with iron bars, and her no-nonsense attitude makes her stand out among the Marines. She first appears during the Alabasta arc, working under Vice Admiral Jonathan, and later pops up during the Summit War.
What's fascinating about her is how she contrasts with other Marine officers. While some are outright corrupt or ruthless, Hina's more disciplined and professional, though still loyal to the organization. Her design is super memorable too, with that sleek black coat and cigarette. It’s funny how minor characters like her leave such an impression—I always perk up when she shows up in cover stories or minor arcs.