No information on that yet, although she might be a viable candidate to be his copilot. At least she can keep an eye on him from up close, all the while taking part in his activities. As seen in the amusement park scene, she seems to have some remarkable fighting skills (kung fu, tae kwon do or whatnot).
As for Gundam SEED, it was 50 episodes...but for Code Geass, it's likely that it'll be 50, too, but divided into two halves made of 25 eps each and separated by two seasons. One MBS/Sunrise insider suggested that CG would run two seasons (25 eps), go off the air for two seasons (25 eps from another series will replace CG at that moment) then come back for the two final ones (25 eps). But there hasn't been any official announcement or confirmation of this yet.
(no subject)
As for Gundam SEED, it was 50 episodes...but for Code Geass, it's likely that it'll be 50, too, but divided into two halves made of 25 eps each and separated by two seasons. One MBS/Sunrise insider suggested that CG would run two seasons (25 eps), go off the air for two seasons (25 eps from another series will replace CG at that moment) then come back for the two final ones (25 eps). But there hasn't been any official announcement or confirmation of this yet.