Speed-o'-Sound Sonic

Speed of Sound Sonic (音速のソニック Onkun no Soniku) is a villain in the series, first appearing as a bodyguard hired by Mr. Monier. He views Saitama as his eternal rival.

Appearance
Sonic is a thin, slightly effeminate man, who despite his slender build is extremely strong and fast. He has black medium length hair that is tied up in a topknot. One noticeable feature is that he has two black marks under his eyes, one under each. He first appears wearing a tight black outfit highlighted by metal plating on the shins, fore-arms, shoulders and chest, as well as a long red scarf. He is shown later in black street clothes. He always carries a ninjato and other ninja equipment such as kunai and ninja stars.

Personality
Sonic is a villain who, despite his normally calm appearance, loves fighting strong opponents as shown by when he gets a "child-like smile" on his face when he first meets Saitama and has two of his attacks blocked, earlier calling this his "bad habit." He seems to be very quick to act as he attacks Saitama on their first meeting without letting him explain the situation.

Paradise Group Arc
Sonic first appears as a bodyguard for a character named Mr. Monier, defending him from a group calling themselves the Paradise Group. Sonic appears before the group and their leader, Hammerhead, as they are approaching Monier's building. After appearing before the group and claiming that he has never let a single person live he quickly dispatches all of the group except the leader who is able to block Sonic's attack in time. After avoiding and subsequently mocking Hammerheads attacks, Sonic hits him in the back of the head with a kunai. Assuming that Hammerhead has been defeated, he calls in to report his success but when he turns back he sees that Hammerhead is gone.

Following after him he meets Saitama whom he then attempts to attack, first with a kunai that Saitama catches, then with his sword - which was also caught and subsequently broken by Saitama. Saitama tries to explain that he isn't part of The Paradise Group and that he's actually a hero who has saved the world several times, but Sonic doesn't listen and says that his pride won't let him have had someone block him that many times, Saitama then calls him out on the fact that he really just wants to fight him because Saitama is strong.

A fight ensues that shows off Sonic's incredible speed, only to end abruptly when the ninja runs his crotch into Saitama's fist. Sonic quickly leaves, claiming that because he has found a strong opponent he was leaving to train, claiming that the next time they meet would be the last and that he would kill Saitama. All the while withering in pain from injuring his groin.

National Superhero Registry Arc
Saitama is running about, worrying about losing his heroes license when an object flies at him and he catches is. This object turns out to be a kunai thrown by Sonic. Sonic begins to threaten Saitama, but Saitama interrupts him saying that they could do this another time and begins to walk away. This enrages Sonic who then draws his sword and rushes at Saitama to attack, but Saitama quickly turns around and bites Sonic's sword in half. Sonic stands still for a second, confused by what had just happened until Saitama threatens to punch him, causing Sonic to shudder from the menacing aura.

At that point the two of them are distracted by Tanktop Tiger who has shown up to investigate the person who'd been running around town (Saitama) and starts to threaten Saitama until Sonic throws several exploding shuriken at him which cause him to pass out. Sonic then jumps back and throws several more exploding shuriken which Saitama is prepared to block, but instead fly off in several directions hitting the surrounding buildings and causing a lot of mayhem. Sonic continues to do this until Saitama jumps up behind him and karate chops him in the back of the head which throws him to the ground hard enough that it leaves an impression of his face in the pavement.

Abilities

 * Super Speed: Sonic's main ability is his extreme speed, he has been shown to be capable of dodging rocks and trees thrown at him with incredible force. How Sonic obtained his ability is unknown, but so far the only person shown to be able to keep up with and surpass his speed is Saitama.


 * Full Frontal Attack: 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.


 * windblade.pngWind Blade Kick: Sonic throws himself at his foe and does a frontflip, during which he throws his foot out to kick his opponent using the momentum of the kick.


 * Slaughtering Mayhem Formation: Sonic leaps around throwing his exploding shuriken at cars, buildings and people to cause massive amounts of panic and mayhem.

Equipment
Ninjato: Sonic carries a sword with a straight blade, and a black scabbard and hilt, it is extremely sharp, capable of cutting through bone.

Kunai: He carries an undetermined number of kunai with which he has shown exceptional ability.

Exploding Shuriken: Sonic carries with him shuriken that upon impact explode.