The Secret of Guard Westwood (Episode)

The Secret of Guard Westwood (看守ウエストウッドの秘密) is the 16th episode of Stone Ocean and the 168th episode of the JoJo's Bizarre Adventure anime. The episode covers the events of part of Chapter 654, then the entirety of Chapters 655 through 659, then part of Chapter 660 of the original manga.

Summary
Jolyne faces off against Westwood while fighting off Survivor's influence and figures out that he is a Stand. Westwood's Stand, Planet Waves, attracts small meteorites towards him that seriously wound his enemies and disintegrate before they hit him. During their fight, Jolyne notices one of the inmates seizing DIO's Bone. Jolyne ultimately defeats the berserk guard by using his boot to store the force of a meteorite and hit him with it.