Ace Combat games have silent characters all the time. Then again, the story is usually never really about the playable character, but more about the context what the war is about, what your wingmen go through and the like.

It does however create a mystery about you. As your character is always in a plane you don't what he looks like. He doesn't have a voice. All you know is that it's you; an awesome pilot changing the tides of war. That's justification right there I guess.