Every Kid Omni-Man Has in ‘Invincible’, From Earth to Thraxa

For a character who once coldly dismissed parenthood as something he could simply repeat on a whim, Omni-Man has ended up with a surprisingly complicated legacy as a father. Nolan Grayson, the Viltrumite warrior hiding behind a superhero identity on Earth, is officially the father of two sons across the comic book series and the Amazon Prime Video adaptation of ‘Invincible’, each born under wildly different circumstances that together define much of what the story is really about.

Omni-Man is the father of Invincible and Oliver Grayson, and a member of the alien Viltrumite race working as a superhero on Earth. His first son is the one audiences meet from the very beginning. Mark Grayson is a normal high school senior whose father Nolan is Omni-Man, the most powerful superhero on the planet, and at the age of 17, Mark begins to display superpowers that come from his father being a member of the Viltrumite race. That origin sets the entire ‘Invincible’ saga into motion, with Mark becoming the hero his father was only pretending to be.

Nolan Grayson is the father of Mark Grayson and Oliver Grayson, the husband of Deborah Grayson, and the paternal grandfather of Terra Grayson and Markus Murphy. The relationship between Nolan and his firstborn is the emotional spine of the whole series, built on a devastating betrayal that slowly, painfully transforms into something resembling reconciliation. Mark’s mother Debbie remains a central figure in that dynamic, and the show has invested heavily in showing just how much damage Nolan’s dual life caused to the family he built on Earth.

The second son is where things get significantly stranger. After leaving Earth, Nolan found a new planet called Thraxa to rule over, and as on Earth, he took a native wife named Andressa and sired a second son, Oliver, who subsequently begins to use the codename “Kid Omni-Man” when he accompanies Invincible back to Earth. Oliver’s existence is a direct product of Nolan’s capacity to start over, which makes him both a symbol of his father’s wandering nature and, eventually, a genuinely compelling hero in his own right.

Oliver Grayson II is a major character in ‘Invincible’, debuting from Season 2 and onwards. As a Viltrumite–Thraxan hybrid, he is the superhero known as Kid Omni-Man, the son of Nolan Grayson and Andressa, the legal adoptive son of Debbie Grayson, and the paternal younger half-brother of Mark Grayson. The fact that Debbie ultimately adopts Oliver, the child her husband had with an alien woman during his exile, is one of the show’s more quietly remarkable character beats.

Oliver was first seen as a baby in Season 2, and when the Viltrumites took Nolan away, Oliver went under the care of Mark and Deborah Grayson on Earth. Oliver is now seen in the Season 3 trailer with a new Omni-Man-inspired costume fighting crime alongside his brother Mark. The dynamic between the two brothers is shaping up to be one of the richer threads heading into the newer chapters of the show, partly because their worldviews are so different. One key conflict between them is how Kid Omni-Man challenges Mark Grayson’s no-kill rule, a notably touchy subject given the events surrounding Angstrom Levy.

What makes both sons so thematically rich is how each reflects a different version of who Nolan Grayson was at the time of their birth. Mark was conceived when Nolan was a Viltrumite sleeper agent playing the role of devoted husband and Earth’s greatest hero. Oliver was born in the aftermath of failure and exile, in a brief window where Nolan ruled a small alien world and tried, in his way, to begin again. Oliver is a unique Viltrumite-Thraxan hybrid, and his distinct purple skin color differentiates him from other Viltrumites and aligns with his comic series depiction.

The show has made no secret of the fact that Nolan’s relationship to fatherhood is one of his most complex and sometimes chilling traits. His infamous dismissal of Mark, suggesting he could simply make another child, haunts the entire series as a reminder of how Viltrumite logic strips the emotional weight from human bonds. Yet both sons ultimately push back against that coldness, each in their own way, making the family of Omni-Man one of the most unexpectedly layered in superhero fiction right now.