Sosuke Aizen is a fictional character from the anime and manga series Bleach, created by Tite Kubo. He serves as one of the main antagonists and is known for his intelligence, charisma, and powerful abilities. Initially introduced as a captain in the Soul Society, Aizen later reveals his true intentions and ambitions, seeking to overthrow the existing order. Aizen possesses the ability to manipulate perception through his Shikai, a special sword technique, which makes him a formidable opponent. His character is central to the series' plot, driving many conflicts and challenges faced by the protagonist, Ichigo Kurosaki, and his allies.