Speed-o-Sound-Sonic

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 latex 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. Despite his normally calm demeanor, Sonic loves fighting, he is motivated by bloodlust against weak opponents, the thrill of battle and his superiority against strong opponents he can beat, as well as competition against a strong opponent he can't beat.Sonic has a large ego, when he sets his mind to killing someone he refuses to give up until he succeeds and is unwilling to tolerate the existence of someone more capable who has defeated 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 Sonic has a soft side. he is also rather judgmental

Initially, Sonic was unimpressed with Saitama as he had mistaken him for another member of the Paradise Group lead by Hammerhead. This changed immediately after Saitama showed that he could stop Sonic's attacks. Sonic was simply elated at being able to fight someone he could test his skills on but after losing vowed he would not stop challenging Saitama until he was able to defeat him.

After their initial fight, Sonic developed a fear of Saitama and would have reoccurring nightmares of his fight with him. He trained continuously until he was able to overcome this fear.[1] Even after losing a second time, Sonic stops viewing Saitama as a monster and more like a huge mountain that he has to overcome.

Sonic views Saitama as his eternal rival and vows to defeat him. Saitama views their one-sided rivalry relationship in a nonchalant manner. He doesn't mind Sonic's persistence and their continuous 'battles', even going as far as encouraging Sonic to do his best. However, he does grow irritated if Sonic starts to bother him during important activities or causes havoc around others.Sonic to stop working and continue training to surpass Saitama. That and dedication, as well as declaring Saitama a rival while admitting defeat at his hands, indicates (in his own way) a form of respect that Sonic has for the hero. Further, Sonic has begun to compare all other opponents he happens to face to Saitama and has even once remarked that they seemed "so small" and like "tiny ants" compared to Saitama.Saitama is an ordinary-looking bald man with brown eyes, a thin but well-built physique, and is of average height and weight. He used to have a full head of short black hair but lost it due to the intensity of his hero training regimen.

Saitama is usually deliberately drawn in a more simplistic style than the other characters, similar to the style of the original webcomic, with an elliptical head and simple facial features. When drawn in a more serious style, Saitama is revealed to have sharp facial features, fearsome eyes, and chiseled musculature. His posture changes as well, with a slack posture and sloping shoulders when lax, and a straightened posture and squared shoulders when serious.