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The protagonist of Sword Art Online. Kirito is the in-game name he uses for his avatar in the fictional game Sword Art Online.
He has short black hair, black eyes, and wears black clothing. His real life appearance and Sword Art Online avatar's appearance are identical. His nickname is "The Black Swordsman".
After the Aincrad arc his avatar's appearance changes:
At the end of the Aincrad arc he reveals that his real life name is Kirigaya Kazuto.