Ichigo Kurosaki is a teenager from Karakura Town who can see ghosts, a talent which lets him meet supernatural trespasser Rukia Kuchiki who enters Ichigo's room in search of a Hollow, a kind of monstrous lost soul who can harm both ghosts and humans. Rukia is one of the Soul Reapers (死神, Shinigami, literally 'Death Gods'), soldiers trusted with ushering the souls of the dead from the World of the Living to the Soul Society (尸魂界 (ソウル・ソサエティ), lit. "Dead Spirit World")—the afterlife realm from which she originates—and with fighting Hollows. When she is severely wounded defending Ichigo from a Hollow she is pursuing, Rukia transfers her powers to Ichigo so that he may fight in her stead while she recovers her strength. Rukia is thereby trapped in an ordinary human body, and must advise Ichigo as he balances the demands of his substitute Soul Reaper duties and attending high school. For aid in hunting the Hollows, the pair ally with a trio of other spiritually empowered teenagers: Ichigo's high school classmate Orihime Inoue, best friend Yasutora "Chad" Sado and the Quincy—humans who have the ability to control spirit particles—Uryū Ishida.