No one knows Lelouch's true nature. C2 does not know about Sherley's incident. Susaku doesnot know about the Euphemia incident, that Lelouch used his geass accidentelly on her... Isn't it quite sad???
Quick thing though i think if remeber a episode right that susaku does find out close to the end the 1 that Lelouch beggs him to help him save Nonnialy and if spelled her name wrong srry f.kinda forgot the exact spelling of it.
Yep its darn sad. I wish he had at least one person to talk to but everybody he talks to only knows a bit about him. At first i thought at least knew him much more but the only person that knows him most is himself. I think at the R2 ending only two people know who he really was and his true intentions (i.e. suzaku and nunally).[if i'm not wrong that is. i'm not too sure]