One-Punch Man: A Hero Nobody Knows

Superheroes usually arrive with a dramatic speech, a signature pose, and a soundtrack that tells you the world is about to change. Then there is Saitama, a hero so absurdly strong that his biggest enemy is boredom. That offbeat energy is exactly why One-Punch Man: A Hero Nobody Knows stands out. The game leans into the anime’s mix of deadpan comedy, flashy battles, and larger-than-life personalities, and the voice cast does a lot of the heavy lifting. The One-Punch Man: A Hero Nobody Knows voice actors give every scene the right tone, whether it is a serious showdown or a joke that lands because someone sounds completely unimpressed. If you are curious about the One-Punch Man: A Hero Nobody Knows cast, these are the performances that help its heroes and villains click.

Saitama voiced by Makoto Furukawa

Saitama is the joke and the punchline all at once. He looks like an ordinary guy, acts like shopping for discounts matters more than saving the world, and still ends every fight in an instant. Makoto Furukawa captures that sleepy, detached charm perfectly. His performance makes Saitama feel funny without turning him into a cartoon.

Furukawa is also well known as Miyuki Shirogane in Kaguya-sama: Love Is War and Benimaru in That Time I Got Reincarnated as a Slime. That range matters here. Saitama only works if the actor can shift from blank boredom to sudden intensity in a heartbeat, and Furukawa nails that balance.

Genos voiced by Kaito Ishikawa

If Saitama is pure understatement, Genos is all fire and focus. He is the loyal disciple who treats every battle like a life-or-death mission, even when his teacher is wondering what to eat later. As a One-Punch Man character, Genos needs conviction in every line, and Kaito Ishikawa brings exactly that.

Anime fans will know Ishikawa from Tobio Kageyama in Haikyuu!! and Naofumi Iwatani in The Rising of the Shield Hero. He has a knack for playing driven, intense young men, which makes him a natural fit for Genos. His delivery gives the cyborg hero a sense of urgency that keeps the game’s fights feeling sharp.

Tatsumaki voiced by Aoi Yuki

Tatsumaki storms into any scene like she owns it, and honestly, she kind of does. She is tiny, terrifying, and never interested in being polite. That mix of arrogance and raw power is a huge part of her appeal, and Aoi Yuki knows how to make every insult sting.

Yuki has one of the most recognizable voices in anime, with standout roles like Madoka Kaname in Puella Magi Madoka Magica and Tsuyu Asui in My Hero Academia. Her work as Tatsumaki gives the esper hero real bite. When players look up the Tatsumaki voice actor, it makes sense that her performance is one of the first people remember from the game.

Mumen Rider voiced by Yuichi Nakamura

Mumen Rider is the heart of the series. He is not the strongest, fastest, or flashiest hero in the One-Punch Man cast, but he keeps going anyway. That sincerity is what makes him memorable, and Yuichi Nakamura gives him warmth without making him sound naive.

Nakamura has voiced major characters like Gojo Satoru in Jujutsu Kaisen and Tetsuro Kuroo in Haikyuu!!. Here, he pulls things back and lets Mumen Rider’s earnestness do the work. It is a quieter performance, but it helps sell why this underdog hero means so much to fans.

Sonic voiced by Kaji Yuki

Speed-o’-Sound Sonic brings chaos wherever he goes. He is dramatic, vain, dangerous, and somehow still hilarious. The character walks a fine line between real threat and running gag, and Kaji Yuki keeps that balance alive with a performance full of energy.

Yuki is famous for roles like Eren Yeager in Attack on Titan and Shoto Todoroki in My Hero Academia. As the Sonic voice actor, he adds flair and tension to every encounter. Even when Sonic is losing his mind over Saitama, he still sounds like someone who could turn deadly in a second.

69 Voice Actors on MTVA

35 Characters on MTVA