Okay, I've been rewatching some clips and rereading arcs lately, and Ran's whole deal is way more interesting than just being Rindou's cooler brother. He's basically the final boss's elite enforcer, but he operates on a completely different wavelength. Rindou is pure unpredictable chaos, but Ran is calculating. He's the one who assesses threats, manages the gang's image, and makes the cold, pragmatic calls Rindou wouldn't bother with. Like, he's not just fighting; he's running a business unit within the criminal underworld.
That fight with Mitsuya was a masterclass in his role. He wasn't just trying to win a brawl. He was testing Toman's strength, probing for weaknesses, and showing off his own terrifying precision. He's the cerebral counterpart to a lot of the brute force in the series. Without Ran, the Haitani brothers would just be scary—with him, they're a strategic nightmare.
Honestly, I think he's underrated because he's so quiet. He doesn't need to scream to be the most dangerous guy in the room.