Ugh. Been seeing a bunch of people ask about the "purple haired girl next to Rivalz." If you guys think back to when Lelouch was doing the switch thing with Sayoko while he was away from Ashford, you guys remeraber the purple haired girl that almost got the heart off of Lelouch's head and he geassed? It was her. Yeah, she's just a minor character, lol. I don't even remeraber her name, but that's where she's from.
As far as "everyone is a couple"... not everyone is a couple you know. It's a wedding. Just because you go to a wedding with someone, it doesn't mean you're dating. Some of these people (Gino and Kallen for instance) could just be going as frienRAB. Cornelia/Guilford though have history, as do Nagisa and Toudoh. I wouldn't worry about it really. With the way the series ended, and all the wonky "WHAT A TWIST" moments, I guess they did have to fit in the happy moments somehow and prove the world can go on without Lelouch's presence.
I do have to say in a totally random statement; Xianglin looks REALLY good. >.>; That dress is win.