There are a lot of wrongs in this wiki, first off, C.C. is a main character, not the third main character, Code Geass lelouch of the rebellion had 4 main characters, with Lelouch as the protagonist; unlike Lelouch of the resurrection which is an AU with Lelouch and CC as the only main protagonist.
Secondly the pink origami crane isn't the one she made with Nunnally, how a paper origami might have survived in such a state, more than 2 years after the day she made it, that's nonsense, C.C. learnt to make origami and it's a symvol of the fulfilled promise Lelouch made to Nunnally. Finally there was no marriage proposal at the end of second season, this very biased translator even had to back up because other people found the deal, Yukana wasn't reacting at the last scene and the director told her you know for CC to hear that it would sound like a marriage proposal, it's not actually a marriage proposal, it sounds for C.C. as a powerful promise in order to get a real reaction; Code Geass fandom is complicted enough I think it's better to be as accurate as we can
And Lelouch of the resurrection changed a lot of things so this line about being mostly unchanged is wrong, Taniguchi said relationship, motivations and some characters fate would be modified and that's exactly what happened, and why it made the fandom even more divided with those enjoying it and those seeing it as a shallow version of Code Geass. Let's be factual please.