| This minifigure has only appeared in video game(s)|
Although this article is about an official minifigure, it never existed in physical form, or appeared in any official LEGO sets.
Ego once told Thor that he was the result of a scientist merging with a planet when that planet's sun went nova.
Ego began absorbing space vessels and even other worlds to survive, planning interstellar conquest. This behavior attracted the attention of the Rigellian Colonizers, who feared that the nearby Ego would consume their home-world. They recruited the Thunder God Thor to defeat Ego. Accompanied by a Rigellian Recorder, Thor encountered Ego, who vowed never to leave the Black Galaxy and renounced its plans of conquest, feeling humiliated by his defeat. Several months later, a weakened Galactus invaded Ego's space and seeked to replenish his energy by consuming Ego. Thor aided Ego in battling Galactus, and drove Galactus off. In gratitude Ego allowed its surface to become the new home of the Wanderers, a group of various alien races whose planets had been the very first to be devoured by Galactus billions of years ago.
- In the comics, Ego was a living planet, unlike in the Marvel Cinematic Universe, where Ego was a celestial where his body was connected to his living planet. He was also married to a human and had a son.
- In the Comics, J'Son of Spartax was the father of Star-Lord, unlike in the Marvel Cinematic Universe, where Ego was his father.
- In the movie Guardians of the Galaxy Vol. 2, Star-Lord sometimes called his father, Ego as Michael Knight.
- Ego appeared in the movie, but he was not featured in any sets.