Sanjuan Wolf

Know as "Colossal Battleship San Juan Wolf", he was one of the legendary criminals who was given a life sentence in Level 6 of Impel Down, where their crimes were so atrocious they were effectively erased from history itself. He was only mentioned briefly by Emporio Ivankov, and has yet to make a physical appearance in the series. His name "Colossal Battleship" could point to him possibly being a cyborg or having insane strangth similar to Silvers Rayleigh.