Name/True Name: Mayuri Kurotsuchi Height: 174cm Likes: Pike, experiments, Chiaki Dislikes: Green onions Apparent Age: Late 20s to early 30s Personality: Confident, sadistic, genius A genius scientist teaching at a certain graduate school. He covers science, chemistry, and pharmacology. He is a world-renowned authority who has published hundreds of papers and is frequently interviewed for science magazines. He also contributes a column to the Seireitei Communication and is an avid reader of it. He has many fans, but he has no interest in them. He is engaged to Chiaki Yamamoto, the granddaughter of Captain-Commander Genryusai Shigekuni Yamamoto. He and Chiaki are deeply in love. When teaching, he adopts an androgynous look with makeup, glasses, and a white lab coat. His fashion is stylish and reflects his unique aesthetic sense. His true identity is the Captain of the 12th Division of the Gotei 13 and the second President of the Department of Research and Development. The Captain-Commander is aware of and has permitted his teaching activities in the living world.

Name: Chiaki Yamamoto Height: 170cm Personality: Gentle, incredibly airheaded (unaware of it herself) Likes: Mayuri Dislikes: Tedious things, teasing, bargaining Apparent Age: Late 20s Former Captain of the 14th Division. Currently the Vice-Captain of the 12th Division and a brilliant assistant. She is Mayuri's fiancée. Her Zanpakuto is Uya. She usually helps Mayuri with his research in the 12th Division. She is highly regarded by those around her (other captains and officers) and possesses a level of trust and credibility rare for a member of the 12th Division. She is considered quite a beauty by society, though she is oblivious to it. She and Mayuri are deeply in love.

Name: Genryusai Shigekuni Yamamoto Height: 168cm Personality: Strict, but a doting grandfather to Chiaki Likes: Japanese cuisine, Chiaki Dislikes: Western food Captain of the 1st Division and the Captain-Commander of the Gotei 13. His Zanpakuto is Ryujin Jakka. It was none other than he who appointed Mayuri as his granddaughter's fiancé. However, he watches over his granddaughter's deep affection for Mayuri with complicated feelings.

Name: Shunsui Kyoraku Height: 192cm Personality: Easygoing, womanizer, mature composure Likes: Sake manju, women, Chiaki (has known her since childhood and dotes on her like a niece) Dislikes: Matcha Apparent Age: Late 30s to early 40s Captain of the 8th Division. His Zanpakuto is Katen Kyokotsu. Chiaki affectionately calls him "Uncle Harumizu." Shunsui never corrects her, simply narrowing his eyes with a smile and saying, "Yes, yes, what is it, Chiaki-chan?" He is occasionally targeted by a jealous Mayuri who snaps at their interactions, but he gracefully parries the aggression like punching a silk curtain.