That character from chapter 63 is the real heir to the Tsumuji family, Yorimasa Mataza Tsumuji. He was a better spearfighter than Jushi and bullied Jushi often (Jushi's mother was a prostitute, so Jushi and Yorimasa are half-brothers); Yorimasa was also always favored by Yorihira. One time, Yorimasa's bullying went too far, Jushi's Dragon Claw powers inherited from his mother activated, and Jushi took it toYorimasa. After [F] allowed Jushi to overthrow Yorihira and take over the Tsumuji family, he kept Yorimasa locked up, tied in a straightjacket, and with his sliced-up legs nailed to the floor. Basically, Yorimasa's presence in the storyline is there to give Jushi some backstory and also to show just how cruel and insane he is.
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