I HAD to vote Rinoa... (failing that, it would be Tifa for all the whining she does)
Saying that, Rinoa whines too. Honestly, I don't know what Squall EVER sees in her. All she did was pester him, and only two minutes ago she had been getting it on with Seifer.
Actually, I wish I could vote both Tifa AND Rinoa, neither of them are worthy of FF-Heroine Status. Neither of them can look after themselves (Tifa always going on about getting in a bind, Rinoa getting captured/falling off cliffs etc) and waste valuable planet-saving time by messing around trying to get the guys to notice them!