Macbeth's people have a strong superiority complex in a way, that will definitely show up in the RP with him too. They have a lot of technology that other races don't have and they feel that gives them the authority to sort of play god with the destiny of other species, like enslaving the Thera (raptor people) and driving others out of their native lands. They're definitely xenophobic, to say the least.

And that seems like a good place to start.