Frist, there is no greek gods in here! This takes place in a world in which they don't live! Also, I don't think it would be right to have gods, because some people might be christians *cough*me*cough* and don't really like that stuff. (Ok, I do like greek gods, but that would be really hard to worry about that!)
Second, you can't be a half-god. The gods don't live on this world, they live in their own plane.
Third...I only really made these rules to talk about the god thing....