Tidus and Yuna.
Although they look kind of alike *cough*
Cecil and Rosa
Cloud and Tifa
Cloud and Aeris
Squall and Rinoa
Irvine and Selphie
Zidane and Dagger
Tidus and Yuna
Shuyin and Lenne
Balthier and Fran
Tidus and Yuna.
Although they look kind of alike *cough*
Even though Tidus was whiny and Yuna had more balls than he did, they're my pick.
Their relationship grew from a little crush to "I'll do anything for you." love. It was really sweet, and you could see the whole thing develop.
Oh i'm suprised that Zid and Dagger are leading.
They would have been my second choice. But imo no one can beat the relationship between Tidus and Yuna.
Cecil and Rosa. It was fun to come smack dab into the middle of a relationship instead of seeing it gradually happen (or just plain shoehorned) during the gameplay. As opposed to all the other games, there's no "redemptive" quality - it's not like one person loving another is going to make that second person any better. (I do love Squall/Rinoa, but it is pretty shoehorned and unrealistic. I'll never admit that in public again.)
There is never any threat to their love - although Kain desires Rosa, there is never any reference that Rosa might see him as anything more than a friend, and Cecil trusts that Rosa will not leave him.
While admittedly Rosa does play the "damsel in distress" far too many times in FFIV, she still has an unwavering faith in Cecil, whether it's fighting against his own nature as a Dark Knight or knowing that he's on his way to save her.
I thought it was incredibly refreshing to see nothing but a strong, mutual love between two characters from the start that never once faltered throughout the gameplay. And they even get married at the end! (The gane's over fifteen years old; I don't think I need a spoiler warning for that one.) If Cecil and Rosa aren't a sterling example of a strong romantic relationship in FF, I don't know what is.
Yes, in the moonlight she is even more beautiful...