Monster X

Monster X, also known by the name of his alternate form Keizer Ghidorah, is a skeletal alien space dragon that is the main antagonist of the series Godzilla.

Name
Monster X's name likely comes from "Monster Zero," an alias for King Ghidorah and "X," from the Xiliens, the alien race that controlled Monster X in the movie Godzilla: Final Wars. "Keizer Ghidorah" comes from the German word kaiser, meaning "emperor," and "Ghidorah," from King Ghidorah, the monster that inspired him.

Appearance
As Monster X, he is a large bipedal monster with skeletal armor on his body and two small skulls on his shoulders. He has red eyes, spikes on the top of his head, and a tail that forks in two. As Keizer Ghidorah, Monster X resembles a quadrupedal version of King Ghidorah, with golden skin, three long serpentine necks with dragon heads crowned with horns, wings on his back, spikes on his knees, and two long, whip-like tails.

Personality
Monster X is a vicious and calculating monster who causes mass destruction across the planet and brutally dispatches any monster who stands in his way. He turned out to be the true threat after SpaceGodzilla's defeat in Godzilla.