yeah, after u beat the Crawler and Negator, every1 rides them Al Bhed jet ski thingys to the temple right? Ive seen this scene 4 times, but twice it was different. The first time i saw it, Rikku rode with Tidus, next 2 times i saw it, twas Lulu, and the most recent time, twas Rikku again, i just wanna no wat determinds this. I think its what you say in reply to Lulu in Guadosalam when she asks "I shouldn't have to tell you this, but dont fall in love woth her ok?"
The 2 times i just picked "ok" i rode with Rikku, the 2 times i chose the oterh options, i rode woth Lulu. Thats just what think, if u can prove me rong, please do so.