Subterranean People

The Subterranean People (地底人, Chitējin) are the self-proclaimed "True People of the Earth". They are ruled by the Subterranean King and live under the earth's crust, but grew too numerous in numbers and planned to take over the surface. They were eventually stopped and chased back into the ground by Saitama.

Overview
The Subterranean People have a humanoid appearance. They are very large with hands the size of a regular human's head. They only have two toes on each feet, and three fingers on their hands. They wear golden or metallic ornaments, wristbands, necklaces and armor over their right shoulder. They all wear different metal helmets, with only their round eyes showing.

They are stronger than regular human beings, and their most dangerous body parts are their feet because they adapted to to moving through the hostile conditions of the underground. The Subterranean People seemed rather confident in their ability to take the Earth for themselves, but after the Subterranean King was defeated they retreated quickly, showing their cowardice.

They are crafty builders, having constructed the entire base where the Monster Association now resides before their slaughter. They are also implied to have had some sort of benefitial relationship with the giant centipedes, as shown in some of their ancient statues in the Monster Associaton's base.

In Saitama's dream sequence they were much larger and more powerful than they truly are, capable of giving Saitama the fight of his life with their immense strength and numbers. Their heights ranged from twice that of an average human to skyscraper-sized - however, this was only a dream.

Saitama Introduction Arc
Saitama wakes up in his apartment when a hand comes through his wall and grabs him, he punches the arm, but for some reason it has no effect. The arm then punches Saitama and sends him flying through a wall, causing him to fly out into the street. Suddenly one of The Subterranean People comes out of the ground behind Saitama and punches him, he attempts to block, but gets sent flying into a guard rail, which he bounces off and collides with an overpass.

When Saitama stands up his forehead is bleeding and he sees more of The Subterranean People climbing out onto the street. The Subterranean People proclaim their ownership of the Earth and a fight ensues, with Saitama eventually being the victor. At that point the Subterranean King shows up, but before anything could come out of that, Saitama wakes up, realizing that it was only a dream.

Shortly after Saitama wakes up, the real Subterranean King shows up, but is defeated instantly after which The Subterranean People retreat back to the Earth, showing themselves to be much smaller and much, much weaker than in Saitama's dream.

Dead Subterranean People.pnger Association Arc
During Child Emperor's fight with Phoenix Man, a statue of the Subterranean King is seen, along with two statues of centipedes encircling him. After Child Emperor's attack manages to rupture the ground and sink underwater, it is revealed that the Subterranean People were massacred in their home by the Monster Association, and a massive grave of their corpses is seen.

The corpses of the Subterranean People are reanimated by Phoenix Man to fight for him but are eventually all defeated by Child Emperor.

Powers and Abilities
Immense Strength and Durability: In Saitama's dream, they were strong enough to make Saitama blood just by one single punch from one of them, and thoug enough to hold their own against caped baldy and it took several serious punches and kicks from the hero to take them down. They say no human before Saitama couldtake one single punch from them and get out alive, referencing to the hero's own overwhelming power. In the real world, they aren't as strong, as well far from how big they are in Saitama's dream. Instead, they are all pretty small and weak, so much that they didn't even tried to fight Saitama and rather surrended pretty easily.

Immense Reflexes, Senses and Endurance: In Saitama's dream, each one of them was able to stand up the bald hero and keep a fight for a long time, Saitama had a hard time bringing down each one of them and almost died because of his injuries during the fight. They aren't that much of a deal in the real world.

Fighting Style
Hand-to-Hand Combatant: Each Subterranean is well versed in hand to hand combat. They are skilled enough to fight Saitama on equal terms and give him trouble, they are also incredible coordinated and make use of their brute force to dominate Saitama on combat. Is not clear how much skilled they are in reality.
 * Subterranean Kick (地底蹴り, Chitei keri): A Subterranean kicks with great force. Sometimes multiple Subterraneans will kick together to combine the power of their kicks.
 * Cooperative Attack (連携攻撃, Renkei kōgeki): Multiple Subterraneans surround their target and attack at the same time.

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