It also houses the Pirate Interrogation mini-game, which enables one character to gain a weapon.
The Fort is also where you meet Samuel, a "Snap Card" player who has great prizes for doing his requests. You will also find Lottery Member #9, First Mate Rackham, who offers several great options for playing. Both characters have important items for Shania's sidequest and Fusion needs. Samuel has a "Bear Statue" and Lottery Member #9 has a "Whale Statue."