The Uchiha are descendants of Indra Otsutsuki, the elder son of Hagoromo Otsutsuki. Through Indra, the Uchiha inherited Hagoromo's eyes, granting them powerful spiritual energy and chakra. As part of the so-called Curse of Hatred first displayed by Indra, Uchiha are subject to powerful emotions: these emotions typically start as love for a friend or family member that then become overpowering hatred when the object of their love is lost. This loss, whether actually experienced or merely threatened, awakens an Uchiha's Sharingan. It is due to the Sharingan that the Uchiha have received much of their fame and notoriety.