Bleach is a shonen action series focusing not on ninjutsu or Quirks but zanpakuto, or soul-cutting swords. Zanpakuto were introduced as the weapon of choice for black-robed Soul Reapers who hunt evil spirits called Hollows, but these weapons aren't just supernatural swords. Zanpakuto have their own names, unique powers, and even different personalities. Some feel fairly ordinary, like Kazeshini and Hozukimaru, while others are downright bizarre.
Source：https://www.cbr.com/bleach-weird-zanpakuto-ranked/
