Banpresto Figure | One-Punch Man | Saitama | DXF Premium Metallic

Saitama (also known as One Punch Man) is the main character in the popular anime series, One Punch Man. He is the most powerful being to exist in the series.

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)