The main antagonist of this story will be Samus's Arch-rival Ridley. Ridley is a notorious space pirate general whose name is known and feared across the galaxy, and his goal is possession of the larval Metroid that Samus has brought to the Ceres space station.
Ridley is a large dragon like creature that appears very bestial in form, but boasts a very high intelligence. Devoid of empathy and mercy, Ridley leaves only death and destruction wherever he and his troops go.
Once again with the series paying homage to the Alien franchise, Ridley may take his name from Ridley Scott the producer of the original Alien movie