Originally Posted by Nominus Experse
I think one reason, if Rikku and Gippal were once together, as I believe they were based on the subtle hints, that Gippal makes fun by calling her 'Cid's little girl' is that he may be somewhat giving her a "pet name" and poking fun at her at the same time. Pretending to halfway not know her as Rikku would probably incite some playful antics of some sort. I've seen couples that have mutually cut the ties of a boyfriend/girlfriend relationship but continue to poke and prod in a completely joking manner. Who knows? They could just be friends and Rikku wishes that she WAS with Gippal. She probably still does..