Sorry, didn't see this thread before.
If this is an isometric game, I think you need to show us the perspective you're working with. Right now, the character looks almost like a standard character in a side-view platformer game. The perspective looks wrong. But it depends on what the game will be like. Once the basic shape of the character is ok, we can start talking about hair and armor.
In general though, I would say that the problem with the hair right now is too much noise. Too many individual pixels that don't do much, so they're just distractions. They're not communicating shape. The first step would be to make larger clusters of same colored pixels and then decide how detailed you want the shapes to be.
