Age: 14 (Beginning of Aincrad arc), 16 (End of Aincrad arc, Fairy Dance arc), 17 (Phantom Bullet arc)
Birthday: October 7, 2008
Height: 172 cm
Other names: Kirito; The Black Swordsman; Beater; Kazu
Weapon(s) of choice: Anneal Blade (1st Level), Queen's Knightblade (9th Level), Elucidator (50th level), Dark Repulser (forged by Lisbeth), and Holy Sword Excalibur (obtained from the "Calibur Quest").
Weight: 59 kg