Mother Brain

Mother Brain is a major antagonist in the Metroid franchise, previously known to be the previous creation of the Chozo, until Ridley arrived and betrayed them all to join the space pirates to unleash mayhem.

Antecedents
Before the events of the games, Mother Brain was created by the Chozo, it served as a communication system that could talk with the Chozo, since Mother Brain became more and more friendly, everything changed after the arrival of Samus Aran to her territory, during a beginning she was vile with her but due to having cremated some harmless creatures called Iona Farias, bitterness grew until the arrival of Ridley and the space pirates to the galactic federation, since she discovered Ridley's plans, Mother Brain had no choice but to betray the Chozo and join the space pirates in order to destroy all of humanity.

Abilities
During the Metroid games Mother Brain has developed powers and abilities to overthrow Samus and be part of the space pirates, such are the ability to throw strong rings that inflict damage and in addition to transforming into a creature similar to a dinosaur to destroy everything his step.