Uchiha, Izuna

うちはイズナ

Izuna Uchiha is the younger brother of Madara Uchiha. He lived approximately 70 years prior to the series' beginning, predating the establishment of Konoha. Alongside his brother, Izuna stood at the pinnacle of the Uchiha clan and was among the first to awaken the elusive "Mangekyou Sharingan". However, Madara lost his sight as a result of using his own. To remedy this, Izuna donated his eyes, enabling Madara to acquire a new, "permanent" Mangekyou.