>>4147
1) Ultimecia summons Griever, wich would be possible since she has Squall's ring, and the link between rings and GFs is laid with Doomtrain wich must be summoned first time using the Salomen Ring.
2) Ultimecia has wings, although they are black, the only other person linked to wings is Rinoa.
3) Edea, at that point posessed by Ultimecia, was able to stop the bullet like she knew exactly when it was coming. She knew it was coming from the clocktower and she knew the exact time displayed on the tower when it was fired. There are only 3 persons who know that exact time because they were there: Squall, Irvine and Rinoa.
4) Ultimecia is able to easily play on Seifer's wish to be the sorceres' knight, his "romantic dream". The only person who knows that dream is Rinoa, since she dated him.
5) Her muzings right before you fight her ultimate form, where she refers to her past and the time with the group amongst other things.
And lots more things that show that the events are not random but rather played out exactly like a play in order to get Squall into the future (the whole point of timecompression), in order to have Squall kill her, as she stated herself that if it does have to happen, she wants Squall to do it.