He is the "King" of Team Plasma. He regularly challenges the player character, Hilbert or Hilda, in order to confirm his ideas of justice. He calls Pokémon "friends", but he wants to split humans and Pokémon and divide them to create a black and white world. He has the unique idea to set Pokémon free from people, and looks for the power to bring his idea to reality.
He returns in the sequel games to help thwart the schemes of his father, Ghetsis Harmonia, who has formed his own Team Plasma with the intent of taking over Unova by force.
Full Name: Natural Harmonia Gropius