Izuna Uchiha was a harmonic and devoted person, who wished for his clan to have peace and stability. He also appeared to be very competitive with his brother, Madara, in terms of skill as they would often spar with one another in an attempt to hone these skills. Izuna's love for his clan grew and he fought fiercely to protect it. He distrusted the Senju clan, even asking Madara, while severely wounded, not to fall for Hashirama's "false" truce. 