100% accuracy?

[Kelg]

How can I make a certain actor have 100% hit rate with all skills and regular attacks?

 

[Onyyx]

I think that a character's DEX stat is what determines their accuracy. You could set that to the maximum value throughout all of their levels... I'm not entirely sure. Correct me if I'm wrong.

 

[Crystalgate]

No matter how much dexterity an actor has, as long as the target has a positive evasion, normal attacks can still miss. If the enemies have an evasion of zero, the attacker needs a dexterity score higher than 8 times the target's agility in order to guarantee a hit. Doing so will also boost critical hit rate to 32% or more. You can give enemies negative evasion scores though, but that will affect the accuracy of all actors.

Skills will always hit if the Hit Rate box is set to 100 and the EVA-F box is set to 0 unless the actor suffers from a status effect that lowers Hit Rate. Of course, if you don't want an actor to ever miss there's no reason to make him/her vulnerable to blindness or whatever you choose to name the status effect.