Question on Innate Skills

New here, hope it's okay to ask this question.
Anyways, here goes.

I know how to change the skills and create new ones fine however, what I'd like to do is create a skill that only certain characters can use without having to make it specific to that characters class (that way you can still change your class and retain your innate abilities!

I hope I was clear in my explanation.. but if not, then just ask!
Is there a simple way to do this?
Is there anyone up to posting and showing me how/hints?

Thanks a bunch.

Well, is there any reason you can't just add the skills through events when you first obtain the party member? Or do you want the skills to have a level progression?

I'll see what I can do. Thanks. I'm not sure I know how, but I will give it a try!