system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Since Ego is a Celestial, why does he appear so different from the other members of his species?
gpt
There’s a really interesting theory related to this that involves the purpose of a group of Eternals as SPOILERS PAST THIS POINT




*spoiler*
Shepherds for the gestation and creation of new Eternals. 

Essentially, whatever planet Ego’s initial seed was planted in had its sentient life (meant to power him and create his body) wiped out by Deviants or some form of cosmic disaster, leaving behind just his brain and no perceivable signs of life to other Celestials, and so they left him for dead. His rage and a galactic-sized inferiority complex related to his people, as well as the presence of Eternals on Earth (a place where he put his own seed) implies that he still operates in a similar manner to other Celestials, but is basically attempting to usurp them by creating more like himself from his own seeds and doing so on worlds where fully grown Celestials plant their own.