Oliver Grayson’s Kid Omni-Man persona explained After Nolan was taken by the Viltrumites, Oliver was left in the care of his half-brother, Mark Grayson (Invincible), and stepmother, Deborah Grayson.

J.K. Simmon's Omni-Man has played a smaller role throughout Invincible Season 3 than in seasons past. Partnered with Allen ...

A still from Invincible season 1: Where does Omni-Man go after leaving Earth? (Image via Prime Video) At the end of Invincible season 1, Nolan Grayson’s departure from Earth leaves fans ...