The king on the red side is of course:
THE PADISHA EMPEROR SHADDAM IV

As the ruler of the known universe the emperor is as feared as he is despised.

With his treachery and his feared Sardaukar Terror Troops, the emporer reigns with complete authority. However he is threatened by the Duke's ever increasing popularity among the great houses of the Lanstrad. He subsequently plots the Duke's downfall by sending him to the prized planet Arrakis, where the Duke is sure to fall victim to the Baron's ruthless plot.

As the absolute power of the red side, and his royal heritage, his role of king is obvious. His appearence is inspired by both the lackluster DeLarentis movie and the westwood studio game. I simply couldn't think of a better look for him.