The Princess Of The Heroes

In the near future, humans discover that the Earth is NOT the only inhabited planet. And that happens by a visit from the space, the UPO (the United Planets Organization), to add the Earth to the organization. Each planet is inhabited by people who look at humans but they have a supernatural power different than others. and they choose James Black to be the King of the Earth to represent his planet. Problems of misunderstanding happen which lead the Earth to a serious and long-term danger. Soon, someone will face these troubles. Who is this person?