Satoru

I will not overlook any crime!

Satoru (サトル), better known by his hero alias Mumen Rider (無免ライダー, Mumen Raidā), is the C-Class Rank 1 professional hero of the Hero Association. He is one of the few people aware of Saitama's strength.

After being offered an opportunity to become a stronger and more effective hero, he joins the Neo Heroes.

Appearance
Satoru is a young man of average height and weight. He wears an armored suit, with brown armor covering his torso and shoulders. He has a black leather suit under the armor and black gauntlets and knee pads. He also has a green bicycle helmet and dark-shaded goggles. Underneath his helmet and shades, he has short, brown hair and oval-shaped glasses that obscure his eyes.

Personality
Satoru is an extremely brave, loyal, and honorable hero who refuses to overlook any crime, no matter how minor or insignificant it may be or back down from any fight, no matter the opponent. He is incredibly determined and never backs down, even at the cost of his own life. He is perfectly willing to give his own life if it means protecting innocent people from evil, even when it is clear he has absolutely no chance of success.

He seems aware that he is weak compared to other heroes, and doesn't feel that he is worthy to move up in class because of it, but he is still more than willing to take on opponents for which the Hero Association sends out for A-Class heroes or above, if only to buy the stronger heroes time to arrive. This shows his selfless concept of self-sacrifice, and how he is willing to go the extra mile, as seen when other C-Class heroes were seen running away from the Deep Sea King.

He is very passionate about justice. He is shown to greatly respect people who save him, as seen when he mails Saitama a letter that he initially tries to compose, but quickly crosses out and finishes with a quick "Thank you!!", afterward asking the owner at the oden bar he was eating at to give Saitama his best serving. Similarly to Saitama, Mumen's heroic deeds are very pure, especially having some sympathy towards villains who seem to have a human heart left in them and appear to be misguided towards a wrong path, such as Bang's former disciple, Garou.

Even though he has been insulted by the Tank Topper Army and several other higher ranking heroes, Mumen doesn't mind. He is also perceptive enough to see what Saitama's true abilities actually are during their first encounter.

He has high expectations of heroes and does not believe they should commit dishonorable deeds. An example of this belief is when he's talking to Charanko in the hospital; when telling Charanko about Saitama and learning of Saitama going to the Super Fight Tournament, he assures Charanko that Saitama would never break the rules to enter in Charanko's place since he is a hero. This could be interpreted as naivety for believing that no heroes can commit selfish deeds.

In many ways, Satoru is a foil to Saitama, Satoru has none of the perceived strength required to be a superhero, and yet he has the immense drive and willpower to be one, while Saitama has all the strength he could need to be a hero, but none of the enthusiasm that Satoru has.

Abilities and Powers
Being the top-ranked C-Class hero Satoru is eligible to be promoted to the B-Class, however, he has refused a promotion because of his belief that he is not strong enough to be a B-Class hero and has managed to retain his place at the top of the C-Class for more than half a year.

Physical Abilities
Enhanced Strength: Satoru was able to hurt Angry Grandpa, a monster resistant to gunfire.

Enhanced Endurance: Despite his injuries and the apparent pain he suffered, Satoru still continued to fight the Deep Sea King, showing a decent amount of endurance. After being hospitalized by Garou, he is seen battling the invading monsters at the hospital despite his injuries.

Enhanced Durability: Satoru withstood an attack from the Deep Sea King, although he was heavily wounded. Satoru also survived having his head smashed into the ground multiple times by Garou. He also took a hit from one of Hammerhead's crew, which caused severe blood loss of his head, but luckily survived. It should be noted that those battle suits can send a car flying with ease.

Fighting Style
Hand-to-Hand Combatant: Not much of Satoru's fighting skills have been seen since he's usually defeated before being able to harm his enemies in any way. However, before being smashed to the ground and judging by his outfit, it seems that Satoru prefers hand-to-hand combat and relies on his speed.


 * Justice Tackle (ジャスティスタックル, Jasutisu Takkuru): Satoru tackles his opponent. This attack is effective enough to make Angry Grandpa let go of his hostage.


 * Justice Punch (ジャスティ殴り, Jasuti Naguri): Satoru punches his opponent. This attack is effective enough to hurt Angry Grandpa.


 * Justice Kick (ジャスティスキック, Jasutisu Kikku): Satoru kicks his opponent. This attack is effective enough to hurt Angry Grandpa.


 * Justice Crane High Kick (ジャスティス・クレーンハイキック, Jasutisu Kurēnhaikikku): Satoru kicks his opponent. This attack is effective enough to knock Angry Grandpa down.


 * Justice Crash (ジャスティスクラッシュ, Jasutisu Kurasshu): Satoru uses "Justice" as a projectile, hurling his bicycle at his opponent.


 * Justice Uppercut (ジャスティス アッパー, Jasutisu Appā): Using his battle suit, Satoru performs an uppercut. This attack is tremendously powerful, being able to defeat a Demon level threat on its own.

Equipment
Bicycle of Justice: Nicknamed "Justice" (ジャスティス号, Jasutisu-gō) In short, this is Satoru's mode of transportation. Appearing as a rather standard utility bicycle (also known as mama-chari), it has a thick frame, a light attached to the front fender, and a basket attached to the handlebars. Satoru seems rather adept at riding his bike, able to ride at high speeds even in rain.


 * Enhanced Durability: The bike is very strong, being able to handle weights of over 200KG while traveling at high speeds.


 * Stand-Up Pedaling Mode: (立ちこぎモード, Tachi kogi mōdo) When Satoru "activates" this mode, he simply stands up and pedals at a much higher rate, allowing him to go significantly faster than normal. His technique allows him to arrive at the fighting scene 2.5 times faster than normal but it drains a lot of stamina so it's a double-edged sword for him.

Justice Helmet: (ジャスティスヘルメット, Jasutisuherumetto)

Justice Goggles: (ジャスティスゴーグル, Jasutisugōguru)

Justice Suit: (ジャスティススーツ, Jasutisusūtsu)

Justice Belt: (ジャスティスベルト, Jasutisuberuto)

Battle Suit: Satoru is eventually approached by Accel, who urges him to retire but offers him a custom-made battle suit should he choose to continue fighting, which he decides to use. This suit tremendously enhances Satoru's power, with him now being able to defeat one Demon level threat in a single blow.

Miscellaneous Abilities
Indomitable Will: Similarly to Saitama, Satoru possesses a lot of sheer willpower. This is most evident in his fight with the Deep Sea King, where he doesn't stop going all on out at the monster despite being brutally thrashed, critically injured and brought near death.

Hero Rating
Satoru's rating determined by the Hero Association:

Quotes

 * (To Deep Sea King) "It doesn't matter if I stand a chance or not! I have to fight you here and now!"

Trivia

 * Satoru is ranked 5th in the character popularity poll.
 * According to the databook:
 * What he likes are DIY shops, bicycles, motorcycles, watching tokusatsu (a Japanese term for live-action film or television drama that makes heavy use of special effects) and reading bike magazines.
 * What he dislikes are bicycle thieves.
 * Mumen Rider's name appears to be a play on "kamen", in reference to the Kamen Rider franchise, and "mumenkyo", which means "unlicensed" and refers to the fact he doesn't have a license.
 * He was christened "Rider" due to his obsessively persistent attitude, and because he's unable to ride a motorcycle.
 * He actually had a license but because he was always in hurry to arrive at the crime scene, he committed too many road infringements for speeding and lost it.
 * Mumen Rider goes on patrols during Christmas time.
 * In the 2017 One Punch Man Halloween cover, Satoru was depicted twice:
 * As a wizard with a witch hat, riding a broom-shaped bike. It is possible this was a reference to Harry Potter, due to Satoru's circular glasses.
 * As a humanoid mushroom based on the Amanita muscaria, being a white-spotted red mushroom with a white gill. On his body there was also the sign キノコ (kinoko, mushroom). The depiction is probably a reference to Ultraman's Mushra, known as mushroom monster.

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