Wasn't Guilford's knightmare's back against the blast of the bomb? I suppose it is possible he'd survive, just seems unlikely.
And Tohdoh also suspects Suzaku is Zero and it was all a plan, correct? He was always a smart character, it does not surprise me. Some other characters may have thought so, due to their reactions, but I guess we'll never know since it wasn't stated if they suspected so.
Since one of my questions was not answered, I'll say it again. Did anyone other than Lelouch, Suzaku, and I suspect Gottwald, know the plan and what was going to happen?
Speaking of Gottwald, he must've thought Lelouch's plan was a great deed and sacrifice to be willing to allow Lelouch to die, since he was so loyal to him.
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