If Greiver is Squall means Squall murder himself in the future.

Sound pretty weird to me unless there is some soft of theory that said when ppl in the FF VIII dies, they had a chance to evolve as a GF?

And if Rinoa is Ultimecia, then the other guardians in the castle might be the orphanage gang since Squall is Greiver meaning the castle is actually Balamb Garden. What a twist of plot.....