Figure | One-Punch Man | Speed-O'-Sound Sonic | Banpresto

Speed-O’-Sound Sonic is a recurring villain in the anime series, One Punch Man. Sonic self-declared himself to be the eternal rival to Saitama and vows to best him in a battle. As a veteran assassin ninja, Sonic has a mastery over ninja weaponry and stealth.

One-Punch Man
The story follows the life of an average hero named Saitama who manages to win all of his fights with just one punch. This ends up being the cause of a lot of frustration as he no longer feels the thrill and adrenaline he once felt in battle. After all, what's so good about having overwhelming power?

Saitama faces a self-imposed existential crisis, as he is now too powerful to gain any thrill from his deeds and actions. He is a bald, ordinary-looking man with a thin, but well-built physique, and is of average height and weight. 

(from One-Punch Man Wiki)