I actually quite like the pairing, I can't think of it as necrophillia because Auron is not a decaying corpse he looks very much alive for 99% of the game. Also I don't see it as pedophillia, I could never imagine Auron dressing Rikku in a ballerina outfit and saying "come sit on daddy's knee little girl hehe" Auron is just not pervy :rolleyes2