Hina's one of those characters in 'One Piece' who doesn't get enough spotlight but totally deserves it. She's a Marine officer, specifically a Captain, and later gets promoted to Rear Admiral post-timeskip. What I love about her is her no-nonsense attitude and her Devil Fruit power, the Ori Ori no Mi, which lets her create iron cages to trap people. She first shows up during the Alabasta arc, working under Vice Admiral Garp, and though she's strict, there's this underlying respect she has for pirates who stick to their morals—like Luffy. Her design's cool too, with that signature purple hair and shades.
Honestly, the Marines in 'One Piece' are such a mixed bag, but Hina stands out because she's competent without being overly cruel. She's not a fan of unnecessary violence, which is rare in that organization. It's a shame we don't see more of her, but every time she pops up, it's a treat. I'd kill for a filler arc focusing on her and her squad.