Kallen Kozuki is a major character in the anime series Code Geass: Hangyaku no Lelouch. She is a talented and fierce pilot who operates the Knightmare Frame, Guren Mk-II. Kallen is known for her dual heritage as both Britannian and Japanese, which causes internal conflict about her identity. She plays a crucial role as a member of the Black Knights, a resistance group led by the enigmatic Zero. Her strong will, dedication to the cause, and exceptional combat skills make her an indispensable ally in the struggle against Britannian oppression.