# Omni-Man
**Omni-Man** (Nolan Grayson) is a fictional superhero and central antagonist-turned-antihero in the *Invincible* comic book series created by [Robert Kirkman](https://www.edgepedia.org/robert-kirkman) and Cory Walker for Image Comics, debuting in *Invincible* #1 in 2003[1](https://comicbook.com/comics/list/the-10-most-powerful-members-of-the-invincible-universe-ranked/). Presented to the world as Earth's premier protector, he is in fact a Viltrumite, an alien from the planet Viltrum sent to prepare Earth for conquest; his true allegiance is revealed in the series' early issues, driving the story of his son Mark Grayson, the half-human hero Invincible[2](https://www.invincible-universe.com/characters/nolan-grayson) • [3](https://www.syfy.com/syfy-wire/invincible-animated-series-amazon-steven-yeun-robert-kirkman-interview).
| Key fact | Detail |
|---|---|
| First appearance | *Invincible* #1 (2003), by Robert Kirkman and Cory Walker, Image Comics[1](https://comicbook.com/comics/list/the-10-most-powerful-members-of-the-invincible-universe-ranked/) |
| Identity | Nolan Grayson, a full-blooded Viltrumite from the planet Viltrum posing as Earth's greatest superhero[2](https://www.invincible-universe.com/characters/nolan-grayson) • [4](https://comicbookco.com/comics/invincible-powers-explained/) |
| Defining story event | Brutally murders the Guardians of the Globe in *Invincible* #7, exposing his conquest mission[5](https://ifann.net/wiki/character/omni-man) |
| Original name | "Supra-Man"; Image changed it because pronounced aloud it was nearly indistinguishable from DC's trademarked Superman[6](https://www.dccomicbooks.com/invincibles-original-name-for-omni-man-was-perfect-but-dc-made-it-go-away/) |
| Powers | Superhuman strength, flight, speed described as relativistic, invulnerability, and a healing factor characteristic of Viltrumite biology[7](https://www.youtube.com/watch?v=73FDLHBRo8Q) |
| Known weakness | Viltrumite biology has a notable vulnerability to high-frequency sound[8](https://vtiax.com/omni-man/) |
| Animated series | Voiced by J.K. Simmons on Prime Video since 2021[9](https://www.skybound.com/invincible/tv-series) |
## Creation and origins
Omni-Man debuted in January 2003 in *Invincible* #1, published by [Image Comics](https://www.edgepedia.org/image-comics), where Kirkman retained creative ownership of the characters[1](https://comicbook.com/comics/list/the-10-most-powerful-members-of-the-invincible-universe-ranked/) • [10](https://www.washingtonpost.com/arts-entertainment/2021/05/01/invincible-robert-kirkman-walking-dead/). Kirkman later revealed, in supplemental material for the collected editions, that the character was originally called "Supra-Man"; the publisher changed the name out of concern that DC would object to a name that, spoken aloud, could hardly be told apart from its own trademark character. His belted shorts, in the Superman mold, were also removed from the design before publication[6](https://www.dccomicbooks.com/invincibles-original-name-for-omni-man-was-perfect-but-dc-made-it-go-away/).
The character has a further prehistory. According to the character's fan-maintained documentation, a concept matching Omni-Man originally appeared in [Alan Moore](https://www.edgepedia.org/alan-moore)'s *Supreme: The Story of the Year* with a blonde, clean-shaven design, before Kirkman reimagined the figure for *Invincible*[5](https://ifann.net/wiki/character/omni-man).
The comic itself ran for fifteen years at Image Comics; it is described as spanning 146 issues and selling more than 6 million copies by publisher [Skybound Entertainment](https://www.edgepedia.org/skybound-entertainment), while Kirkman's own account at the time of the adaptation put the final issue at number 144 in 2018[11](https://www.skybound.com/article/invincible-becomes-longest-running-original-animated-series-on-prime-video) • [10](https://www.washingtonpost.com/arts-entertainment/2021/05/01/invincible-robert-kirkman-walking-dead/).
## Powers and Viltrumite biology
Omni-Man possesses the standard Viltrumite suite of abilities: superhuman strength, flight, extreme speed, invulnerability, and a healing factor. Character analyses of the series describe his speed as reaching relativistic levels and his strength as among the most devastating in the *Invincible* universe[7](https://www.youtube.com/watch?v=73FDLHBRo8Q). He is not portrayed as infinitely powerful: the series establishes stronger opponents within the Viltrumite hierarchy above him[8](https://vtiax.com/omni-man/).
**A defined vulnerability.** Viltrumite biology has a notable weakness involving high-frequency sound, a limit that stories in the series have used to threaten otherwise nearly invulnerable characters[8](https://vtiax.com/omni-man/).
Viltrumite and human biology are compatible enough to produce viable hybrids. Mark Grayson, Omni-Man's son by the human [Debbie Grayson](https://www.edgepedia.org/debbie-grayson), inherits the genetic potential for the full range of Viltrumite powers, though his abilities arrive gradually during adolescence and his power ceiling is treated as still rising rather than fixed[4](https://comicbookco.com/comics/invincible-powers-explained/).
## Role in the story
For the first twelve issues of the comic, Omni-Man was Earth's greatest superhero and the most important character in the series, before his true allegiance was revealed[1](https://comicbook.com/comics/list/the-10-most-powerful-members-of-the-invincible-universe-ranked/). The turning point is his murder of the Guardians of the Globe, the world's leading superhero team, in *Invincible* #7[5](https://ifann.net/wiki/character/omni-man). In the animated series, this honeymoon period of a father-and-son superhero story lasts only about forty minutes of screen time, compared with seven issues of buildup in the comic[3](https://www.syfy.com/syfy-wire/invincible-animated-series-amazon-steven-yeun-robert-kirkman-interview).
After the revelation, the character's arc turns on his family. He begins as a villain but undergoes significant development, struggling between his Viltrumite duties and his love for his family; the character's official profile now describes him as a man defined by his regrets, atoning for his past while navigating exile and a new family[5](https://ifann.net/wiki/character/omni-man) • [2](https://www.invincible-universe.com/characters/nolan-grayson).
In the comic's later run, the Viltrumite warrior Grand Regent Thragg fought and eventually killed Omni-Man in a prolonged battle described as one of the most brutal sequences in the series[12](https://nerdsnack.com/thragg-invincible-comic-vs-animated-series-differences/).
## Comparisons and cultural footprint
As a Superman analog who turns out to be an alien invader bent on conquest, Omni-Man is frequently placed beside [Homelander](https://www.edgepedia.org/homelander) from *The Boys*, a similarly dark take on the all-powerful public hero. Kirkman, quoted in Skybound's "Invincible vs. the World" segment, said he had discussed the matchup with *The Boys* executive producers [Seth Rogen](https://www.edgepedia.org/seth-rogen) and [Evan Goldberg](https://www.edgepedia.org/evan-goldberg), who conceded that Homelander is significantly less powerful and that Omni-Man would win easily[13](https://comicbookco.com/comics/homelander-vs-omni-man/). The character also crossed into Mortal Kombat 1 (2023) alongside Homelander[14](https://as.com/meristation/comics/noticias/pocos-lo-recuerdan-pero-the-boys-e-invencible-tuvieron-un-crossover-secreto-y-fugaz-en-los-comics-f202605-n/).
One scene in particular escaped the page: the "Think, Mark" confrontation between father and son became one of the most meme-generating moments in animation history[5](https://ifann.net/wiki/character/omni-man).
## Adaptation on Prime Video
The adult animated *Invincible* series premiered on Amazon Prime Video in March 2021, with J.K. Simmons voicing Omni-Man opposite [Steven Yeun](https://www.edgepedia.org/steven-yeun) as Mark and [Sandra Oh](https://www.edgepedia.org/sandra-oh) as Debbie[9](https://www.skybound.com/invincible/tv-series) • [3](https://www.syfy.com/syfy-wire/invincible-animated-series-amazon-steven-yeun-robert-kirkman-interview). Kirkman said the show is a "second draft" of the comic, moving the mature and brutal aspects of the story earlier and expanding characters the comic underused, particularly Debbie, who in the source material was largely a background figure[3](https://www.syfy.com/syfy-wire/invincible-animated-series-amazon-steven-yeun-robert-kirkman-interview) • [15](https://comicbook.com/tv-shows/feature/how-the-invincible-tv-show-fixed-the-comics-biggest-problem/).
Kirkman also recounted that Simmons was initially offered a different role; after reading the script, the actor asked instead to play Omni-Man[16](https://www.gamesradar.com/entertainment/superhero-shows/invincible-creator-says-j-k-simmons-was-initially-offered-a-different-role-in-the-hit-prime-video-show-we-sent-him-the-script-and-he-was-like-id-rather-be-omni-man/). The series has continued to expand: by June 2026 it had been renewed for a sixth season ahead of season five, making it the longest-running original animated series on Prime Video, and Skybound's fighting game *Invincible VS*, which features Omni-Man as a playable Viltrumite, reached more than 1 million players within two weeks of release[11](https://www.skybound.com/article/invincible-becomes-longest-running-original-animated-series-on-prime-video) • [17](https://www.gamesradar.com/games/fighting/invincible-vs-review/).
## References
1. [The 10 Most Powerful Members of the Invincible Universe, Ranked, ComicBook.com](https://comicbook.com/comics/list/the-10-most-powerful-members-of-the-invincible-universe-ranked/)
2. [Nolan Grayson, Characters, Invincible Universe](https://www.invincible-universe.com/characters/nolan-grayson)
3. [Amazon's 'Invincible' animated series gives the mega-mature superhero story a retelling, SYFY WIRE](https://www.syfy.com/syfy-wire/invincible-animated-series-amazon-steven-yeun-robert-kirkman-interview)
4. [Invincible Powers Explained: Viltrumite Biology, ComicBookCo](https://comicbookco.com/comics/invincible-powers-explained/)
5. [Omni-Man, Invincible Character, iFANN](https://ifann.net/wiki/character/omni-man)
6. [Invincible's Original Name for Omni-Man Was Perfect, But DC Made It Go Away, DCComicBooks.com](https://www.dccomicbooks.com/invincibles-original-name-for-omni-man-was-perfect-but-dc-made-it-go-away/)
7. [Omni-Man Anatomy Explored, Saiba Nerd (YouTube)](https://www.youtube.com/watch?v=73FDLHBRo8Q)
8. [Omni Man Powers: How Strong Is Nolan Compared With Other Viltrumites?, VTIAX](https://vtiax.com/omni-man/)
9. [Invincible TV Series, Skybound](https://www.skybound.com/invincible/tv-series)
10. ['Walking Dead' creator Robert Kirkman explains his new show 'Invincible,' The Washington Post](https://www.washingtonpost.com/arts-entertainment/2021/05/01/invincible-robert-kirkman-walking-dead/)
11. [Skybound's Invincible Becomes Longest-Running Original Animated Series on Prime Video, Skybound](https://www.skybound.com/article/invincible-becomes-longest-running-original-animated-series-on-prime-video)
12. [Grand Regent Thragg: Comics vs Invincible TV, NerdSnack](https://nerdsnack.com/thragg-invincible-comic-vs-animated-series-differences/)
13. [Homelander vs. Omni-Man: Who Would Actually Win in a Fight?, ComicBookCo](https://comicbookco.com/comics/homelander-vs-omni-man/)
14. ['The Boys' e 'Invencible' tuvieron un crossover secreto, AS Meristation](https://as.com/meristation/comics/noticias/pocos-lo-recuerdan-pero-the-boys-e-invencible-tuvieron-un-crossover-secreto-y-fugaz-en-los-comics-f202605-n/)
15. [Prime's Invincible Adaptation Has Definitively Fixed the Comic's Biggest Problem, ComicBook.com](https://comicbook.com/tv-shows/feature/how-the-invincible-tv-show-fixed-the-comics-biggest-problem/)
16. [Invincible creator says J.K. Simmons was initially offered a different role, GamesRadar](https://www.gamesradar.com/entertainment/superhero-shows/invincible-creator-says-j-k-simmons-was-initially-offered-a-different-role-in-the-hit-prime-video-show-we-sent-him-the-script-and-he-was-like-id-rather-be-omni-man/)
17. [Invincible VS review, GamesRadar](https://www.gamesradar.com/games/fighting/invincible-vs-review/)
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*Topic: Encyclopedia › Arts and culture › Literature and written works › Creative written works and worlds › Comics and sequential art › Comics characters and fictional worlds › Independent publisher characters*
*Initially written Sep 17, 2026 · Reviewed: Sep 19, 2026; Oct 25, 2026 · Edited: Sep 19, 2026; Oct 25, 2026 · Last review: Oct 25, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license