A Zanpakuto is a unique sword wielded by the characters in the anime and manga series Bleach. Each Zanpakuto is a manifestation of its owner's soul and possesses special abilities that reflect their personality and spiritual power. The sword has two main forms: the sealed form, which resembles a regular katana, and the released form, which unleashes its true powers. When a Shinigami, or Soul Reaper, learns to communicate with their Zanpakuto, they can unlock its Shikai and Bankai forms. The Shikai is the initial release, while the Bankai is a more powerful transformation that requires extensive training. Each Zanpakuto is distinct, making them integral to the identity and strength of their wielders.