Sadi-chan is one of the Chief Guards in Impel Down. Commander of the Four Demon Guards.
The character of Sadi-chan is a supporting character in the One Piece series that was created by Eiichiro Oda. The series first began serialization in Weekly Shōnen Jump on August 4, 1997. She would later appear in the Impel Down Arc that began in Volume 54.
Her first appearance was in One Piece Volume 54 CH. 531 "Level 3 Starvation Hell", and her first anime appearance was in One Piece - Episode 432 "The Unleashed Swan! A Reunion with Bon Clay!". Her character in the Japanese series is voiced by Yuka Koyama, and the U.S. dub produced by FUNimation has yet to announce a voice actress.