Sadie is the guard leading the four Impel Down's tormenting beasts: Minotaurs, Minokoala, Minorhinoceros and Minozebra. To keep them calm, and be obedient to her orders, Sadie uses a long and dangerous whip called "Akamamuchi". With this whip, she is also responsible for punishing prisoners of Impel Down and satisfy her sadistic needs.