Unohana Retsu appears as a slender, youthful woman with blue eyes and black hair, always worn in a large braid over her chest. She wears the standard captain's shihakushō with an obi, and a gentle smile rarely leaves her face. Her demeanor is calm and polite, addressing everyone with honorifics. Yet beneath this serene exterior lies a history as the first Kenpachi, the most diabolical criminal in Soul Society's past. As the captain of the 4th Division, she is a master healer, but she also harbors a deep love for battle. Her presence is both comforting and intimidating, a duality that defines her.