Speed-o'-Sound Sonic - One Punch Man

Speed-o'-Sound Sonic (音速のソニック, Onsoku no Sonikku), more commonly called Sonic (ソニック, Sonikku), is a recurring villain and occasional anti-hero. He first appeared as a bodyguard hired by Zeniru. He is a former member of the 44th Graduation Class of the Ninja Village, nicknamed The End (終わり, Owari; Viz: The Final). Sonic is also a self-declared eternal rival of Saitama.

Appearance

Sonic is a slim young man. His long black hair is normally tied up in a topknot, and bangs fall over his face. A noticeable feature of his is the purple marks underneath his large gray eyes. He usually wears a tight black bodysuit highlighted by metal plating on his shins, arms, shoulders, chest, and waist, as well as a long purple scarf that falls to his legs. During his fight with Genos, Genos ripped his scarf and tore off his topknot, leaving the ninja with short hair.

Personality

Despite his normally calm demeanor, Sonic loves fighting, motivated by bloodlust against weak opponents, motivated by the thrill of battle and his superiority against strong opponents he can beat, and motivated by competition against a strong opponent he can't beat.

Sonic has a large ego, and when he sets his mind to killing someone, he refuses to give up until he succeeds, unwilling to tolerate the existence of someone more capable who has directly beaten him.

Sonic has no regards for human life other than his own, and even takes pride in the fact that he has never let an opponent live.

To that end, he holds considerable disdain for the world, being quite cynical, especially towards heroes. As shown when meeting Genos for the first time, he tells him that heroes can neither win against a truly strong opponent nor can they truly protect anything.

Despite the way he presents himself, Sonic has a soft side, something seen when training to fight against Saitama. During this period, he spent a great deal of time with Frank, a hunter who had almost been killed by a bear and confides with him his inner turmoil. While he is pacing himself, Speed-o-Sound finds and befriends a little piglet as well, naming it Ino, thus showing his more noble side. When Sonic leaves to search for Saitama, he gives his words of wisdom to Frank, saying that if he is too confident in his fighting style and loses, the result will always be the same. It is unclear as to how far this side of him goes to, as he was willing to warn Genos of the Deep Sea King, yet fought him when Genos interfered with his battle with Saitama.

Due to constantly losing to Saitama, Sonic is shown willing to do anything, even trading his own humanity, to defeat him by becoming a monster through the consumption of a Monster Cell provided by Gale Wind and Hellfire Flame.

Sonic also respects Saitama for fighting monsters and even promised to himself to never fight Saitama while the hero is fighting monsters. He holds a very negative view of the Hero Association and some S-class heroes after observing how they treat a powerful hero like Saitama like a low-ranked and worthless hero because of his looks. Ironically, he is also rather judgmental as he assumes Tatsumaki exploits her childish cuteness and that those with benign appearances are weaker than himself, displayed in his fight against Saitama and Kamikaze.

Abilities and Powers

As a veteran ninja and assassin, Sonic is a master of ninja weaponry, possesses incredible amounts of speed, and is adept at hiding his presence. Fubuki commented that Sonic's fighting ability is that of an S-Class individual. However, he is rather helpless against Dragon-level monsters, as seen in his fights with Gale Wind, Hellfire Flame, and Energiser.

Physical Abilities

Immense Speed and Reflexes: Sonic's main power lies in his immense speed and reflexes. When confronting the Paradisers, he was capable of easily moving faster than they could react, decapitating every single member of the group apart from their leader Hammerhead, in only mere moments. Sonic was also able to easily dodge all attacks from Deep Sea King, a Demon-level monster that could outmaneuver A-Class heroes effortlessly, only had difficulty when the monster entered its true form. It has been stated by Murata that Sonic is faster than the S-Class hero Metal Bat. During his fight with Genos, an S-Class hero, Sonic was capable of keeping up with the cyborg in combat, with both of their movements being so fast that Fubuki could not even see any of them.

Enhanced Strength: Despite his thin build, Sonic is stronger than the average human. He was able to dislocate Base B's shoulder and incapacitate Special Moves Mile with no apparent effort.

Enhanced Durability: Sonic's durability is greater than the average human's. He withstood Base B's shoulder and dislocated the prisoner's shoulder in turn.

Fighting Style

Ninjutsu Master: Sonic is a master of ninjutsu and has knowledge of various deadly techniques.

Full Frontal Attack (正面からまっすぐに狩る, Shōmen kara massugu ni karu): Sonic takes a low stance and rushes forward at speeds that make him impossible to be seen. The effect of this attack is not known because it was interrupted by Hammerhead.

Wind Blade Kick (風刃脚, Fūjinkyaku): Sonic flips forward multiple times extremely quickly and uses his momentum to deliver a kick to his opponent.

Hail of Carnage (殺戮乱陣, Satsuriku Ran-jin): Sonic throws a hail of Exploding Shuriken, causing destruction to his surroundings.

Four Shadows Burial (四影葬, Shiei-sō; Viz: Fourfold Funeral): Sonic creates four afterimages using a special movement technique.

Scattered Flash Slash (散閃斬, Sansenzan): Used in a conjunction with Four Shadows Burial; Sonic attacks his opponent with his four afterimages. This was used against Genos. However, the effectiveness of the attack is unknown, as Saitama saved Genos before Sonic could hit him.

Ten Shadows Burial (十影葬, Jūei-sō; Viz: Tenfold Funeral): A technique that Sonic has developed to defeat Saitama. He refers to this as his ultimate technique. Upon using the Ten Shadows Burial, Sonic creates ten afterimages and reaches super-supersonic speeds.

Equipment

Ninja Weaponry: Sonic uses a variety of ninja-based weaponry in combat.

Ninjatō: Sonic's primary weapon. The sword has a straight blade and a hilt and is sheathed in a black scabbard. It is extremely sharp and capable of cutting through bone.

Kunai: Sonic carries a number of kunai and is exceptionally skilled in their usage.

Mizugumo (水蜘蛛): Literally translated to "Water Spider", wooden sandals used to walk on water.

Exploding Shuriken (爆裂手裏剣, Bakuretsu shuriken): Shuriken that explode upon impact.

Smokescreen Shuriken (煙幕手裏剣, Enmaku shuriken): Shuriken that leave a trail of smoke. Sonic uses them to conceal his position.