Shū Kannogi

is Rurichiyo Kasumiōji's fiancé. He is introduced during The New Captain Shūsuke Amagai filler arc. His appearance seems to be that of a younger teenager. He also has brown hair and is often seen with a melancholic face. Shuu is first seen at Seireitei, worrying about Rurichiyo's whereabouts. He is appointed as the head of the Kasumiōji household while Rurichiyo is away in the real world as part of Gyōkaku Kumoi's scheme to take over the Kasumiōji family. Shū is not as adventurous as Rurichiyo, and has never set foot out of the manor except in his ported chair. He addresses Rurichiyo as "Ruri-chan".

When Rurichiyo finally shows up to the Kasumiōji's manor again, he was very ecstatic because he claimed life was so boring without her. When his wedding with Rurichiyo is interrupted by Ichigo Kurosaki and Rukia Kuchiki, he discovers that the Rurichiyo at the wedding is a fake. Upon hearing this news, he tells Ichigo he wants to help Rurichiyo in any way he can. With the manor surrounded by the Second Division, he offered to help Ichigo and Rukia escape by putting up an act to "take him hostage". They got out of the manor without anybody trailing them. After that, he then mainly traveled on Ichigo's back. When he witnessed Ichigo fighting with the Third Division's newly appointed Captain, Shūsuke Amagai, he intervened by placing himself in between to stop them and beg Amagai to listen, which ultimately helped them. He loves Rurichiyo and tries his best to protect and save her. He seems to feel safe by Ichigo and Rukia's side.

