 When the Black Knights took the Art Gallery hostage, she is confronted by Suzaku and was surprised that she's not only a member but a half Britannian-Japanese right after he left to stop Zero from killing the Emperor.After Lelouch was captured and accused for killing the Emperor, Kallen assume leadership of the Black Knights as the new Zero and later led the remaining Black Knight members to begin an assault on the Governor Building of Area 11, unaware that Lelouch is freed by Suzaku and are both planning to stop Schneizel.Five years later, a 22-year-old Kallen is seen walking on the street and still a member of the Black Knights and in contact, but while she was passing by, she suddenly saw someone who resembles a 17-year-old Suzaku, which she thinks she's imagine it.