Seishirō is a character from the manga and anime series X/1999, created by CLAMP. He is known for his charming personality and complex motivations, often serving as an antagonist. Seishirō possesses powerful abilities, including the manipulation of nature and the ability to heal, which he uses to achieve his goals. In the story, Seishirō is a member of the Sakurazukamori, a group tasked with eliminating those who threaten the balance of the world. His character is deeply intertwined with themes of love, sacrifice, and destiny, making him a pivotal figure in the narrative's exploration of conflict between opposing forces.