I think the Wooden Sign is one good minor character. XD I'm referring to the one at the Verda Grove.
For a major character, I don't really want to say who at this point. The game is still in development, and there might be many more characters to come along the way. However, I have a feeling that Hawk would be someone cool.

I'm thinking that he might be like Balthier from FFXII, only he isn't a leading man. :p