Everyone's a descendant of Ultimecia? Hmm, makes TOTAL sense, considering Ultimecia lives in the FUTURE and the FF8 team live in the PRESENT. Maybe you got "descendants" and "ancestors" mixed up?
And also, Rinoa is in no way a clone to Ellone. She didn't get the people out of prison by sending Zell to the past (Ellone did that... and Zell pretty much mentioned that even though he was Ward in the dream he still didn't know his way around, so it didn't help them at all). Rinoa got them out of prison by going in and showing our FF8 team the way out.
And if all the FF8 team fused to become Adel, they'd be fighting themselves, no? Wouldn't that mean they either would drop dead after defeating her, or feel pain if they attacked her or something?

Hey, here's an idea... all the characters in FF8 could be unrelated unless stated so in the game or stated by Square.
Sorry if that post sounded nasty but I don't see any evidence to back up your claims, FE or Serapy.