Uchiha Clan Symbol Tattoo

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Kishimoto had read a variety of manga to obtain ideas for the creation of an effective rivalry between two characters, which he incorporated into Naruto and Sasuke's relationship. He was also inspired by his relationship with his twin brother, Seishi Kishimoto; since childhood, Masashi had worried about Seishi when he faced failure and had tried to help him. To contrast Sasuke with Naruto, Kishimoto made him less emotional and depicted him as a "cool genius"; he felt he had created an ideal rivalry in the pair, and when one character progressed he ensured the other did as well. Kishimoto wanted Naruto and Sasuke to seem like brothers and rivals, building on a mutual experience of childhood loneliness. Although Sasuke does not regard Naruto as a worthy opponent at first, he is surprised by Naruto's growth and becomes fiercely competitive. In the Part I finale, their rivalry leads to a fight and they grow further apart. Kishimoto said he did not want Sasuke to recognize Naruto as an equal until later in Part II.