Strength (2), originally The Unseen Stand in the WSJ release, is the one hundred thirty-first chapter of the JoJo's Bizarre Adventure manga. It is also the eighteenth chapter of Stardust Crusaders.
Summary
Confused as to how many Stand users are present in the ship, the Joestar group splits up to look for any traces of a stand. The sailors wait on the deck with Anne. The girl approaches the orangutan Forever and is surprised by how intelligent (and perverted) he is, but is warned by the sailors that he could easily rip her arm off should she come closer.
She goes to take a shower, and Forever uses this opportunity to go after her, brutally killing all the sailors on his way. He enters the shower and tries to rape her, but is surprised by Jotaro, who comes to the conclusion that the orangutan is the Stand user. After a short battle, Jotaro is suddenly hit by one of the ship's fans, which throws itself at Jotaro. Confused, Jotaro wonders where Forever's Stand is hiding and why he can't see it.