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...Yes. [ he hitches his smile up a little higher. ] I became his knight, and that's how everyone here knows me. Knight to Lelouch vi Britannia, 99th Emperor of the Holy Empire of Britannia.
[ gods this isn't what he meant to do. but she asked what happened to Schneizel, and... anyway, isn't it better? not just a truce here because the war back home doesn't matter, but a truce because finally someone understands what their side was really trying to do.
it was never part of the plan for anyone to understand the Zero Requiem, not even after it was over, but it's not like he's telling her how. only why.