· Villains with a personal connection to the protagonist
· Returned from the dead multiple times
· Criminals who work under the main villains (Mother Brain/Sigma) who commit their violent acts for personal fulfilment, rather than monetary gain
· Psychotic killers who adore death and destruction
· Based on liveaction scifi movie villains from the 70’s (Xenomorph, Bubba Zanetti)
· Cybernetic augmentations
· Purple colour scheme
· Responsible for moulding the protagonist’s path at the beginning of their games with unwinnable boss fights
· Have successfully gotten the better of the protagonist, and on at least one occasion would have killed them if not for outside intervention from an antagonist turned ally (Zero/Baby Metroid)