Yachiru Unohana is the first Kenpachi, a seemingly perfect and prideful woman who is, in reality, a bizarre and brutal serial killer. She is cold, cruel, sadistic, and utterly remorseless. Her personality can be described as psychopathic and crazy, finding joy in battle and slaughter. She is immensely strong, fearless, and seemingly immortal, immune to all forms of attack. Unstoppable and invincible, she cannot be reasoned with and has a habit of describing her actions with exorbitant detail. She will not hesitate to kill someone gruesomely.