It was all for Nunnally's sake. Everything that he had done, is for the future of Nunnally, yet he died an evil in the eyes of the world; yet she couldn't look forward to it because her dear big brother could no longer be with her. By the time she knew the truth, it's too late. In her arms, lied Lelouch, feeling the slightest happiness as he spoke his last words, "I see, I destroyed the world and created a new..."
Lelouch is gone but Zero lives on and will forever be the Knight of Justice. As long as this symbol remains, the world will be a gentler place just like what Nunnally and Euphemia always dream of.
He, who accepted the power of Gea