Roche Tomson

Roche Tomson was listed as a Level 5 prisoner in the Impel Down jail on the list Bentham (disguised as Hannyabal) was reading from.

Nothing else is known about him/her and it is even unknown if he/she is still alive (though considering the name on the list is not crossed off, he/she may still be), but since Tomson is kept on the maximum security Level 5 it can be assumed that he/she is a notorious and dangerous criminal, probably with a high bounty (over 100,000,000).

Trivia

 * Roche Tomson's name is similar to that of real-life pirate Roche Braziliano, a Dutchman who sailed in Brazil and was noted for his extreme sadism, even amongst other pirates. Also, Braziliano was at one point caught by Spanish forces, as was Tomson by the World Government, only he escaped and eventually disappeared.
 * His/her number on the list of prisoners in Impel Down is 6581.