Most useless part members in any party based RPG?

[finalrpgfantasy]

Hiku said:

But Kimahri is pretty high up there as well.
Mainly because I never used him I guess. But that put me in a tough spot when I was forced to fight Biran and Yenke using only Kimahri, who was at lvl 12 or something.

Even though he is a useless character, I didn't have a problem in this battle.  I'm a completionist, and I couldn't stand not leveling him up nor gaining his abilities with lancet.  He is pretty much at the same "level" as the other characters.