Jason Marnocha
Voice ActorJason Marnocha is an American voice actor known for his deep, growling voice who plays Knuckleduster in the English dub of My Hero Academia: Vigilantes.
My Hero Academia Role
Marnocha voices Knuckleduster, whose civilian name is Iwao Oguro, in the English dub of the 2025 spinoff series My Hero Academia: Vigilantes. The character is a grizzled, brass-knuckled vigilante who mentors the story's younger lead, a part that plays to Marnocha's reputation for gravelly, hard-edged line readings.
Career and Notable Roles
Born in Indiana in 1989, Marnocha has worked across studios including Bang Zoom! Entertainment, Funimation, Crunchyroll, NYAV Post, Sound Cadence Studios and VSI Los Angeles, typically voicing monsters, villains and other rough-edged supporting characters in anime and video games.
Frequently Asked Questions
Who does Jason Marnocha voice in My Hero Academia?
Jason Marnocha voices Knuckleduster, whose civilian name is Iwao Oguro, in the English dub of the 2025 spinoff series My Hero Academia: Vigilantes. The character is a grizzled, brass-knuckled vigilante who mentors the story's younger lead.
What is My Hero Academia: Vigilantes?
My Hero Academia: Vigilantes is a 2025 spinoff series set in the same universe as the main show, and it is where Jason Marnocha voices Knuckleduster in the English dub. The series follows unlicensed heroes operating outside the law, with Knuckleduster serving as a mentor figure to its younger lead.
What is Jason Marnocha known for as a voice actor?
Marnocha is known for his deep, growling voice, which studios often cast in monster, villain and other rough-edged supporting roles. That reputation led to his casting as Knuckleduster in My Hero Academia: Vigilantes.
What studios has Jason Marnocha worked with?
Marnocha has worked across studios including Bang Zoom! Entertainment, Funimation, Crunchyroll, NYAV Post, Sound Cadence Studios and VSI Los Angeles. His work at these studios spans anime and video game voice roles.
When was Jason Marnocha born?
Jason Marnocha was born in 1989 in Indiana. He is an American voice actor whose gravelly delivery became a signature of his casting in anime dubs.
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Sources & Information
This content is original writing by Daddy Jim Headquarters based on the Dragon Ball anime series, manga, and official materials. Episode and chapter references are cited where applicable.
Character and scene imagery on this site is original artwork by Daddy Jim Headquarters, not screenshots or licensed imagery. Official cover art is used on three types of pages for editorial commentary:
- Movie pages: theatrical posters and key visuals, credited to Toei Animation and Shueisha.
- Game pages: official box art, credited to Bandai Namco, Atari, and other publishers.
- Manga chapter pages: Jump Comics volume covers, credited to Shueisha and Akira Toriyama.
Official resources:
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