Zangetsu (懺月 Repentance Moon) is the manifested spirit of the Zanpakutō owned by Dyan Arashi. Like all Zanpakutō, Zangetsu can be found within Dyan's Inner World, acting as his advisor and partner. Interestingly, Zangetsu is also influenced by Dyan's former Hollow powers which were relegated to his Fullbring, effectively making him partially Hollow Dyan (虚 (ホロウ) ぢおん, Horō Dyan), who was created when Dyan developed an Inner Hollow within his soul, a commonality among the Visored. However, as of now, Zangetsu ony refers to himself as "Zangetsu", implying becoming the source of a Fullbring rendered Hollow Dyan to nothing but minor reiatsu.