Gums

Gums (ハグキ, Haguki) was a Dragon-level Mysterious Being and a member of the Monster Association.

Appearance
Gums is a large, rotund monster with two arms and two legs. Its head contains no features other than an incredibly large mouth that lacks any lips.

Personality
Gums doesn't appear to be intelligent and is incapable of speech. However, it is incredibly gluttonous and driven by the desire to consume.

Monster Association Arc
Gums eats some monsters before the battle against the Hero Association.

Gums sneaks up behind Pig God and swallows him whole, only to have Pig God fight his way back out of Gums' mouth, and the two engage in hand-to-hand combat. After a relatively short battle, Gums stood victorious. Later, Gums is seen rising from the rubble and joins up with the other Dragon level monsters to fight Tatsumaki. When Genos attacks Fuhrer Ugly, Gums rips off Genos' arm with his teeth, and Black Sperm assists him. He was defeated instantly later on by Bang with the top of his head being ripped off.

Abilities & Powers
As a high-ranked member and a Dragon-level Mysterious Being of the Monster Association, Gums is an extremely powerful being.

Physical Abilities
Immense Strength: Gums is able to use its huge mouth to chomp through things like metal and debris with ease - it managed to swallow Pig God, a hero known for eating monsters, to defeat them. Aside from that, he was also shown to be capable of using the rest of his body when he went head to head with him, and ripped off Genos' arm with ease.

Immense Speed: Despite appearances, Gums appears to be incredibly fast as it was able to sneak up on and take Genos and Pig God, two S-Class heroes, by surprise.