Retsu Unohana

Unohana has the appearance of a slender and very youthful woman with blue eyes and black hair. She wears the standard Shinigami captain shihakushō apart from using an obi instead of the normal sash, which hides her well-endowed bosom. Her hair is long and is always worn as a large braid down the front of her body. Master Healer: Unohana learned healing techniques from Tenjirō Kirinji. Though she originally learned healing Kidō to prolong her fights, Unohana since became the most knowledgeable on health-related matters in all of Soul Society, highly proficient in conventional healing techniques and herbal healing. Her knowledge of anatomy is great enough that upon examination of Aizen's "dead body", she concluded it was not Aizen or even real. She is also able to heal more than just Shinigami, as shown when she heals Yasutora Sado, a Human, as well as Gantenbainne Mosqueda, an Arrancar.

Kidō Master: Unohana has advanced knowledge of Kidō and the flow of spiritual energy. Her knowledge and mastery of healing Kidō are unrivaled within Soul Society. Unohana is well-versed in a variety of Kidō, highly masterful in healing Kidō and is able to easily use high-level Hadō and Bakudō spells without incantation.

Kaidō (回道, Turn Way): As the captain of the 4th Division, Retsu is highly proficient in Kaidō, having taught the technique to the members of her division. Master Swordsman: Unohana's personal specialty is sword fighting, particularly in the art of Kendō. She is said have mastered all the countless styles of swordsmanship that exist in the world, hence the meaning behind her previous name, "Yachiru". Her skill level in swordsmanship is far superior to even the current Eleventh Division captain, Kenpachi Zaraki, as she is able to easily best him for a considerable amount of their fight after centuries of not engaging in melee combat. During their battle, Unohana easily overpowered and fatally wounded Zaraki several times, only losing when Zaraki grew powerful enough to kill her. Unohana is also adept in sleight-of-hand, able to seamlessly launch her concealed dagger blades with deadly accuracy.

Shunpo Practitioner: Unohana is proficient enough in this skill to be as fast as the average captain.

Hakuda Combatant: During her fight to the death against Zaraki, Unohana deflected his sword swing using the back of her free hand to create an opening for her own attack and subsequently blocked Zaraki's sword hand mid-swing with her foot, stopping his attack while simultaneously leaving him exposed.

Immense Spiritual Power: As one of the oldest captains in the Gotei 13 and therefore one of the most experienced, Unohana has a tremendous amount of spiritual power. Alongside Genryūsai, she is one of the first captains who were noted to be the strongest generation of the Gotei 13, making her one of its most powerful combatants in history. Unohana has acknowledged that no one but Kenpachi Zaraki's power exceeds her own.

Keen Intellect: Along with her general skill of healing, she is able to detect the smallest details in her patients. This aids her in her healing. She can detect anomalies and problems lesser healers would not. She can tell by a simple look what type of medical attention, if any, is needed. She is also a keen analyst with great attention to detail, able to quickly determine how to counteract any ailments a person may have. Her powers of perception were great enough to deduce that Aizen's elaborate illusion of a corpse doll wasn't real, and that Aizen was perpetuating a much larger scheme. Zanpakuto Minazuki (肉雫唼, Flesh-Drops' Gorge): In sealed form, Minazuki is slightly longer than an ordinary katana, and resembles a nodachi. The tsuba has an oval shape, and the handle is red. Instead of tying it to her obi, Unohana carries her Zanpakutō over her shoulder by a rope strap in "Tachi style", or lets Isane carry it for her. Shikai: Its release command and the process of its transformation is unknown. In its Shikai form, Minazuki becomes a giant, green, one-eyed manta ray-like creature that can be used for transportation, with the ability to fly and sprout a pair of legs to land upon. When Unohana decides to seal it, Minazuki melts into a slurry of flesh that enters her scabbard before returning to its sealed state. Shikai Special Ability: Minazuki possesses the ability to heal; when wounded individuals are placed within its mouth, they are swallowed and stored inside its stomach. The stomach acids of Minazuki are strong healing medicines and ointments which gradually soak over the wounded, curing their injuries. It can carry at least six people within its stomach. At Unohana's command, Minazuki will regurgitate the people out of its mouth onto the ground.

Bankai: Minazuki (皆尽, All Things' End): When initiating the release, Unohana cuts her hand alongside the edge of her blade. The blade of Unohana's Zanpakutō liquefies into a thick, viscous, blood-like substance. At the same, the blood-like substance also appears around Unohana and her opponent. Once the majority of the liquid flows off the Zanpakutō, the remainder solidifies into a shortened katana. Bankai Special Ability: The blood-like substance unleashed by Minazuki can be manipulated for potent offensive and defensive maneuvers. The slashes from Unohana's main sword can form large and sharp blades from the blood-like substance to swiftly attack her enemies from long distances. She can also create smaller blades by performing rapid slashes in all directions, creating a loose sphere that protects her from attacks. Additionally, she can use Minazuki to rapidly heal any injuries she sustains without requiring Kaidō.