Genos

Good Qualities

His character design is overall the best design out of all the One Punch Man characters thanks to his cyborg body.He along with Tatsumaki, Fang, Mumen Rider, etc. are the One Punch Man characters that wasn't mean-spirted to Saitama.His backstory in the second episode of the One Punch Man show was emotional as it shows that he was originally a human but then got turned into a cyborg after his city was destroyed and he almost died until Saitama punched the Mosquito Girl.He stands up for Saitama as whenever Saitama is having a hard time fighting, Genos would come along and help Saitama fight the villain like team-work.Even Genos spawned his own meme too, the one where he got hurt by the rock and Saitama tells him that is he okay.He and Saitama even spawned an epic fight scene even if the fight was only for training, it's still cool.Most of the humor involving Genos is that he's dark and serious about everything (like paying rent and peeling potatoes) in contrast to Saitama's apathy and lightheartedness.

He once infamously annoyed Saitama in the second episode by calling him "Sensei" and "master" a lot and infamously bald shamed him in the same episode.He usually loses his body parts, making him helpless until Saitama or any other hero comes to his rescue

Unwavering Determination: When Genos sets his mind to something, he does it t once. Such as when he moved to live with Saitama, he stood there with all of his belongings, intent on showing his "unwavering determination".Admiration to Saitama: Genos without any doubt has absolute dedication to his master. Going as far as to call for complaints whenever the heroes association ever does something wrong, such as messing up his merchandise or when he was going to go off to attack a person for sending Saitama hate mail. Genos views his master as an absolute being of true heroism. Zombieman even notes that Genos really admires Saitama[1]. Genos himself has even said nothing is more important then Saitama[2], showing his admiration for him even goes beyond his vegeance against the mysterious cyborg.Straightforward: Genos unlike some of the other heroes, is on constant pursuit of any monster, even if his arms or legs are ripped off he won't stop fighting until he's at his opponents throats, being noted to have a "demonic" aggression.Vengeance: His pursuit of strength is fueled by his desire for vegeance from the mysterious cyborg who took his hometown from him. Genos notes how Amai Mask was like him before he met Saitama, having a hard heart that deeply hates evil and rushes to destroy it.

Genos is a mechanical cyborg of average human height. His face and ears look like that of a normal human, made of artificial skin material, and his eyes have black sclerae with yellow irises. He has spiky blond hair.His eyebrows are blond (brown in the anime). He also has pierced ears. Genos wears normal street clothes and sleeveless tops and hoodies to allow his arms to transform without hassle. He has been shown to have many different sets of arms, with varying abilities and strengths.Notable examples of his various "arms" are those he used in his sparring match against Saitama and the arms he equipped to combat the meteor. When using Arms Mode, a metal framing forms around his cheeks.

Genos (ジェノス, Jenosu) is the deuteragonist of One-Punch Man. He is a young adult cyborg and the disciple of Saitama. He is always aiming to become more powerful and he fights for justice. Under the Hero Association, he is given the name Demon Cyborg (鬼おにサイボーグ, Oni Saibōgu) and is currently S-Class Rank 11.

Genos is a mechanical cyborg of average human height. His face and ears look like that of a normal human, made of artificial skin material, and his eyes have black sclera with yellow irises. He has spiky blond hair and his eyebrows are blond (brown in the anime). He also has pierced ears. Genos's wardrobe consists of street clothes with all of his upper-body attire being sleeveless as to allow his arms to transform without hassle. He has many different sets of arms, with varying abilities and strengths. Notable examples of his various "arms" are those he used in his sparring match against Saitama[4] and the arms he equipped to combat the meteor.[5] Sometimes the arm sets he uses create a metal framing around his face, like when utilizing Arms Mode and in his Monster Association Arc Upgrade.

Genos is an extremely serious character, rarely if ever making jokes. He constantly strives to become stronger and often seeks Saitama's guidance to achieve his ambitions. Since becoming Saitama's disciple, Genos shows deep reverence and protectiveness towards him, referring to Saitama as "master." While he both admires and envies Saitama, he still feels frustration and disbelief at Saitama's seemingly simple training regimen, which somehow resulted in extraordinary strength.

Occasionally, Genos acts as a comic foil to Saitama's oblivious nature. He frequently employs advanced techniques, battle strategies, and robotic upgrades to fight villains, often sustaining severe damage, only for Saitama to defeat the same enemies with a single effortless punch. Convinced that there is a secret behind Saitama's immense strength, Genos is motivated to observe him closely to uncover this mystery.

Genos was naturally calm and self-possessed, but he often overthought and fell into anxiety; spending time with Saitama allowed him to relax, and avoided the fate of becoming a weapon of revenge. He recognizes his growth when he witnesses Sweet Mask ruthlessly dispatch a group of alien prisoners, reflecting on how similarly unyielding he once was.[8] Gradually, Genos has become less serious and even curious about minor aspects of life, such as the meaning of fun.[9]

Genos holds deep respect for two individuals: Saitama and Dr. Kuseno, the man who saved him.[10] He extends professional respect to those who display genuine expertise, such as Bang and Bomb,[11] and tolerates individuals like King, whom Saitama willingly spends time with.[12] However, he exhibits jealousy towards Overgrown Rover when Saitama pets the dog or calls it by name.[13][14] He shows little to no hesitation in eliminating individuals he deems dangerous threats, even if they are still humans or criminals. One particular example is Garou; during their battle, he didn't seem to try capturing Garou alive but instead appeared more intent on eliminating him as he would a monster.[15]

Genos tends to be disrespectful towards most others, particularly those who interrupt or annoy Saitama. Whenever Bang or Fubuki command him or attempt to recruit Saitama, Genos interrupts and demands they get to the point. He staunchly defends his role as Saitama's disciple, actively discouraging Saitama from forming close relationships with others. This hostility extends beyond those who offend Saitama; it also includes Dr. Kuseno. Genos has even called out Saitama for calling Dr. Kuseno an old man, though he quickly apologized.[16] Genos shows little respect for the Hero Association's authority, informing Sitch that he would have joined the Monster Association raid regardless of whether he was part of the main task force, stating that his actions are independent of the Hero Association's decisions.[17]

Genos takes pride in his abilities and himself. During his battle with Awakened Cockroach, he feels frustrated for having to use instant adhesive gel, which forces him to acknowledge that there are monsters faster than he is.[18] However, his fights against G4, Face Ripper, Awakened Cockroach, and Garou demonstrate that he values strategy alongside raw power.

Before becoming a cyborg, Genos was also serious, described by ONE as a diligent and responsible boy from a young age.[19]

As an S-Class hero, Genos is undoubtedly a powerful fighter. Despite his age, he possesses a considerable amount of battle experience, claiming to have defeated many evil entities and organizations before meeting Saitama.[21] However, his youth and impulsiveness occasionally hinder him, resulting in missed victories in battle. The Virtual Genocide System (VGS) simulations showed that Genos (at the time) had a 70% chance of victory against any Demon-level threat.[22] According to Gyoro Gyoro, while his functionality is impressively advanced, he lacks the firepower needed to defeat something large and durable like Elder Centipede. Since that encounter, he has grown stronger and has increasingly adopted a strategic approach to combat. After two months, he has become capable enough to take on Dragon-level threats, having defeated one single-handedly, which underscores his remarkable growth.

Physical Abilities

Genos breaks the ground with a dropkick.

Immense Strength: Enhanced by his cyborg physiology, Genos possesses incredible physical strength, and is capable of breaking apart the ground with a dropkick,[23] and punching rapidly with enough force to tear apart a cliff face.[24] He is also able to lift a truck with a single hand without difficulty.[25] During his brief fight with the Deep Sea King, he was able to land a full-force punch on the creature that sent it flying through the wall of the safety shelter.[26] In his fight with Garou, Garou noted that his strength rivaled that of Tanktop Master.[27]

Genos "teleporting" behind Sonic.

Immense Speed and Reflexes: Genos is very agile and can move so fast that he appears to be teleporting. He was able to keep up with Speed-o'-Sound Sonic for a considerable amount of time in their battle, with both of them moving faster than Fubuki could see.[28]

Immense Endurance: Genos's body is almost completely artificial and does not have the same vulnerabilities that completely organic beings possess. In conventional terms, he does not experience fatigue since his performance and abilities are contingent on the condition of his cybernetics, the energy supply in his core, and the energy output of his core. His body is constructed from highly durable materials and can only be damaged when external forces surpass the limits of those materials. Genos can continue fighting without much drawback even with portions of his body missing. As he lacks blood or vital fluids, he is immune to blood loss, and his neural connections to his cybernetic body differ from those of normal humans, rendering him impervious to shock or its inhibiting effects. He has demonstrated the ability to fight and move even after his limbs have been torn off on various occasions. Due to most of his body being artificial, he appears to have an extremely high tolerance to injuries due to him not being able to feel pain for the most part. However, it can be inferred from the expression on his face after coming into contact with the Deep Sea King's acid spit that he is susceptible to pain caused by direct acidic corrosion on his body. Apart from this, he seldom displays significant signs of physical stress.

Radiation Resistance: As a cyborg, Genos possesses a remarkable resistance to lethal radiation that can swiftly incapacitate even powerful individuals such as heroes, including those of S-Class caliber. Prolonged exposure to such radiation is ultimately fatal for them, whereas Genos can endure it without succumbing to its effects.[29]

Cyborg Physiology: Genos's entire body has been replaced with combat-ready cybernetics and prostheses, giving him an extreme level of strength and speed, as well as advanced sensors and projectile attacks. All of his parts have made Genos too heavy to swim and he needs special parts in order to do so.[30] In addition to these modifications, Dr. Kuseno gave Genos the ability to taste and made it so his cybernetic body turns organic intake into biofuel, presumably to power his person.[31] He has been shown eating on multiple occasions like when he engages in an eating contest with Saitama[32] and when he eats hotpot at Saitama's apartment.