Amiba

アミバ

Claiming to be a genius, Amiba trained in Nanto Suicho Ken under Rofu. After failing to become the successor, he shifted his focus to Hokuto Shin Ken. When Toki refused to share his knowledge, Amiba began experimenting on his own, nearly killing an elderly man in the process. Toki scolded him for this mistake, leading Amiba to swear revenge against both Toki and the Village of Miracles.
Amiba later joined forces with Jagi, who helped him resemble Toki and even scarred his back with a club to mimic Toki's scar. Amiba learned enough Hokuto Shin Ken techniques from Jagi to successfully impersonate Toki. With the real Toki imprisoned in Cassandra, Amiba damaged his reputation and tortured both civilians and martial artists through his experiments.
He conducted sadistic "new pressure point tests" on living humans and reported his findings to Raoh. He also claimed he could master any martial art in a short time. He develops a style imitating Hokuto Shinken, which he names Hokuda Shin Ken (Needle Fist of the North Snake) in Ten no Haoh.

Spoiler