[Big Dude]

Originally posted by Vicious

By the way, Rikku is pretty much useless, except for her ability to use Al Bhed potions, which cure all status ailments and restores 2,000 HP of all characters, that's about all she's good for.

Thats not entirely true. You need her for bribe which you use to get very very valuable and rare items. And she is used for steel, and if you use her enough and level her up she can become pretty strong... But if your just gunna teach every character every ability and take all the chalage out of it... well then yeah, every character is useless.