Katsuya Oonishi
Jimmy is the main character of the series. Jimmy is a very strong and tough fighter, full of energy and is always there to help his friends but he can be stubborn or act as an idiot at the same time.
When he was kid, a famous tattoo master saved his life and after that Jimmy started drawing tattoos on himself.
Jimmy considers him as his hero and hopes to meet him someday. Jimmy's dream is to become the world's greatest tattoo master.
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