Bleach is a popular anime and manga series created by Tite Kubo, featuring a diverse cast of characters. The story follows Ichigo Kurosaki, a teenager who gains the ability to see spirits and becomes a Soul Reaper, tasked with protecting the living world from evil spirits known as Hollows. Other key characters include Rukia Kuchiki, who initially transfers her powers to Ichigo, and Renji Abarai, Rukia's friend and fellow Soul Reaper. The series also introduces various antagonists, such as Sosuke Aizen, a former Soul Reaper who seeks to overthrow the Soul Society, and his loyal followers, the Espada. Each character has unique abilities and backstories, contributing to the rich narrative and themes of friendship, duty, and sacrifice throughout the series.