Izuna Uchiha was one of the five sons of Tajima Uchiha, a gifted member of his clan known for his skills and rivalry with his brother Madara. He witnessed the brutal conflicts between the Uchiha and Senju clans, participating in battles and awakening his Sharingan and Mangekyo Sharingan. Along with Madara, he became a leader of the Uchiha clan.