Rei

Rei, or "Ray" as he's known in the Viz English manga, is the badass heir to the Nanto Suichouken style, all about flair and finesse. This guy kicks off as a rough-and-tumble mercenary whose main goal? Take down the guy with seven scars who snatched his sister, Airi. He teams up with Kenshiro to protect Mamiya’s village from the Fang Clan, and after Ken rescues his sis, Rei becomes his right-hand man for a while. But things take a wild turn when he challenges Raoh, only to get crushed, leaving him just three days to live. His hair turns white when Toki steps in to help extend his life, and he uses those final moments for revenge against his rival, Yuda. Ultimately, Rei meets a tragic end, but he definitely leaves an unforgettable mark.