Smile Man

 Smile Man (スマイルマン, Sumairuman) is an A-Class Superhero, rank 27.

Saitama Introduction Arc
He arrives at A-City with Lightning Max to fight Vaccine Man, but is utterly defeated.

Abilities
Smile Man's high ranking as an A-Class hero shows that he is a highly capable individual.

Trivia

 * Smile Man's design, especially in the anime, resembles the comedic character, Chapulín, from El Chapulín Colorado (English: The Red Grasshopper), created by the Mexican comedian Roberto Gomez Bolaños AKA "Chepirito".