Fushū Castle.
Fushū Castle (俘囚城, Fushū-jō) is a structure in the centre of Curtain Village, which formerly served as the headquarters of Gengo and the Enlightened Ones until their disbandment. While under the rule of the noble Sakuya, she had a team dedicated to erecting and maintaining an impenetrable barrier around the stronghold. After her death and the barrier's dispelling, the castle was immediately ransacked and pillaged by the impoverished citizens, who were all killed by Deepa when he came to investigate.