Groribas

Race: Alien
Height: 820 cm
Abilities: Acid Breath
Level: Dragon
Affiliation: Dark Matter Thieves
Debut: Chapter 32/Episode 10

Groribas was one of the Alien Invaders who attacked A-City.

Groribas is an alien with a large imposing body. Its head and hands consist of eyeless mouths with rows of long sharp teeth. His head has a spiky dog collar around his neck.

(Source: OnePunch-Man Wikia)