Kallen Kōzuki (紅月カレン Kōzuki Karen) is one of the two tritagonists featured in Code Geass: Lelouch of the Rebellion. Her Alias is Kallen Stadtfeld (カレン・シュタットフェルト Karen Shutattoferuto), and goes by this name at school, but prefers her mother's maiden Japanese name. Kallen is the captain of the zero squad that works directly under Zero's command. She pilots the Gurren, the Gurren flight enabled version and the Gurren Seiten.