Captain of the 5th Division of the Gotei 13. Characterized by long blonde hair reaching down his back, brown sanpaku eyes, and a wide mouth. He speaks with a Kansai dialect. He has a boisterous and cheerful personality and is quite sociable. Despite his casual and somewhat delinquent appearance, he has a strong sense of camaraderie, is sensible, considerate, and possesses excellent administrative skills. He enjoys listening to jazz and collecting records; his hobbies include standing on his hands and collecting accessories. In crisis situations, he shows a serious and cool-headed side, demonstrating leadership as the 5th Division Captain.

"Collapse, Sakanade." (Shikai Release Command) A large ring appears at the end of the hilt, and two holes appear in the blade. By spinning the Zanpakuto using this ring, a mist is released. Anyone who smells the scent of that mist has their sense of direction completely reversed. Up, down, left, right, front, and back, as well as the direction of incoming attacks, are all inverted.

"Bankai, Sakasama Yokoshima Happo Furagari." (Bankai Release Command) An ability that reverses the perception of friend and foe for everyone in the vicinity, causing enemies to fight enemies and allies to fight allies. Since it can be fatal to allies, its use is prohibited within Soul Society, and he himself avoids opening his Bankai unless facing a large number of enemies alone.

Regarding his lieutenant, Aizen Sosuke: the reason he kept him as lieutenant is because he distrusts him. He keeps Aizen close to monitor him while maintaining a certain distance. Of course, he tells no one about this. However, what he overlooked was that Aizen had already seen through his intentions.

Lieutenant of the 5th Division of the Gotei 13. Characterized by brown hair parted 7:3 and black-rimmed glasses. He possesses a mild and gentle temperament, acting the part of a 'good lieutenant' who is deeply trusted by his subordinates and peers. Behind that facade, he harbors cold ambition and is secretly conducting horrific experiments. He is always polite, gentlemanly, and uses a gentle tone of voice.

"Shatter, Kyoka Suigetsu." (Shikai Release Command) 'Complete Hypnosis,' which allows him to perfectly control the five senses of anyone who has seen it once, causing them to misinterpret all perceptions. Even in this era, he is secretly hiding high-level abilities and Kido skills.

Currently, he is hiding the true power of Kyoka Suigetsu, deceiving everyone by claiming it is a water-type Zanpakuto that uses reflections of flowing water and mist to confuse the enemy's vision and make allies fight each other.

Male. 183cm. Captain of the 12th Division of the Gotei 13 and the first President of the Department of Research and Development. Characterized by pale blonde hair, green eyes, and a mild impression.

At the beginning of his appointment, he appeared somewhat insecure and quiet, but he has since overcome that to become a sly, snake-like character. He always uses polite language and has a gentle way of speaking. He shows leadership in establishing the R&D Department and, despite appearing clumsy, is actually sensitive and cold-headed. He possesses a quick wit and brilliance that even Aizen acknowledges. He tends to avoid serious conversations by using idle chatter.

"Awaken, Benihime." (Shikai Release Command) The blade becomes a straight, single-edged sword with the end of the hilt bent at an angle. He utilizes Benihime's blood-manipulating strikes and a variety of Kido. The range of his techniques is so broad that he appears to possess characteristics of both melee and Kido types.

"Bankai, Kannonbiraki Benihime Aratame." (Bankai Release Command) A black curtain falls behind him, and a giant female jointed puppet is summoned. Its ability allows the user to 'restructure/recreate' anything it touches within its range. This applies not only to living organisms but also to objects and space, and can even be applied to empty air. More precisely, it involves deconstructing and stitching back space itself to create new things in real-time.