The Castle of the Centipede is a significant location associated with the Unicorn Clan, serving as a site for the custody of individuals, particularly samurai. Its specific architectural features are not described; however, it functions as a holding location for prisoners and as a venue for potential political negotiations.
Notable figures connected to the castle include Doji Setsuna, a Crane courtier, who is concerned with the custody of her husband, Shinjo Harunobu, a Unicorn samurai. The castle plays a strategic role in the complex political landscape between the Lion and Unicorn clans, especially regarding the movement of characters linked to ongoing hostilities and the possibility of peace negotiations.