Himawari

Himawari (ヒマ悪, Himawari) was a Mysterious Being that Saitama saved an old lady from.

Appearance
Himawari is a tall monster whose head resembles a sunflower with sharp teeth and flowers covering his nipples.

Brushing Up
Himawari was defeated by Saitama, saving an old candy shop owner from him.

Trivia

 * The name of this Mysterious Being would translate as Hima-Evil, making a word pun with "Sunflower" (Himawari in japanese).