Mind games as in making Lelouch forget about his sister and think he had a brother? I guess that could work. It would make for an awesome emo breakdown/simulated fratricide episode for when Lelouch finally snaps out of it.

For all we know, V.V. is not working with the Emperor. I sorta think that he's just doing this to fuck with C.C., and that equals throwing a wrench in all Zero and C.C.'s best laid plans. The best way to do that is to prop up Suzaku (and maybe the Emperor) along the way.

V.V., Rollo: Two characters we don't know nearly enough about to really come up with any decent conjectures.