Just cause there it's much to say here. Its something magical
Lelouch with Kallen or C.C(C2) seems to have a destined relationship which ends up short with Lelouch's goal. It hurt Lelouch and Kallen when they separated shortly after Lelouch was king, the kiss was magical but Kallen didn't understand and lelouch and to keep it a secret. Lelouch passed on the duty of Zero to Suzaku. So the people will not lose hope. Its hard being the bad guy but someone has to do it. What a beautiful scheme, still sad he had to die. Kallen and C.c missed him very much. Kallen still had a picture up of him and cried if I rember correctly in the last seconds of the anime. C2 wasn't a great fighter but Lelouch and her worked well together. She got him out of many jams and was one of the few that understood his true motives. C2 Looked up at the sky and thought of lelouch before she departed.