The Patron Saint of the Three Realms of Seireitei

Traveling through the Soul Society, taking over the role of the previous guardian of the three realms, I got a strange sword that can be upgraded through battle, and there are actually two swastikas! Yamamoto Genryusai: "He will be my successor in the future." Aizen: "Why does Kyoka Suigetsu have no effect!?" Yhwach: "Chief Special Agent in Charge of Combat Power, Gu Shami!" Kurosaki Ichigo: "You can only marry one of my two sisters! You can only marry one!!!" Spirit King: "Waibi Babu?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.