Impel Down Personnel

Impel Down (インペルダウン, Inperudaun?) is one of three main locations of the World Government (alongside with Marineford and Enies Lobby), and is known as the world's greatest prison. Impel Down possess a system of levels where the prisoners are sent depending on their crimes; the most dangerous and insanely powerful criminals are sent to Level 6, and the less dangerous to Levels 1-5.