God

You are correct. Humans are foolish.

An enigmatic entity referred to as God (, Kami) by several individuals such as Homeless Emperor, Psykos, and Blast.

Appearance
In its first appearance, "God" looked like a swirling gust of wind with scribbles that outline a person. "God" is described by Psykos as reminiscent of Jupiter's surface with countless spiraling spots overlapping over one another.

When Saitama, Flashy Flash, and Manako peered through a hole while they were underground, "God" seemingly appeared to be in another dimension and it looked like an extremely massive humanoid entity, so much so that it completely dwarfed the hole they peered into. However, none of the three could see it.

When making its second appearance in Homeless Emperor's vision, it looked like a giant humanoid figure made entirely out of flesh and bones with no face. It is unknown whether its physical form is the same, if it even has one, or if they were just imaginary projections in Homeless Emperor's mind.

When making an appearance in a vision to Tatsumaki and Garou, "God" impersonated Blast's appearance as he was when Blast first met Tatsumaki and Bang for Garou. The facade quickly fell away to display his true faceless appearance once the trick failed to work for either of them.

Personality
"God" gave Homeless Emperor its powers and enhanced the abilities of Orochi and Psykos, although its motives remain unknown. "God" apparently agrees with Homeless Emperor's belief that humanity is a worthless plague on an otherwise grand and beautiful planet.

It also has the tendency to test whether people are worthy to receive its power or not through a mysterious cube. If not, they will face "forfeiture", presumably killing them.

Apparently, "God" tends to keep people from being aware of its existence or knowing about it if possible. This is seen when it mercilessly takes away Homeless Emperor's life and powers before the latter can actually answer any inquiry from Zombieman. "God" is also an opportunist, as it attempted to lure Tatsumaki and Garou into accepting its deal by using the guise of Blast and Bang, respectively, though it quickly left when Tatsumaki realized it is not the real Blast.

While "God" claims that it does not like humans, it apparently does not care for the life on Earth as well. This was shown as according to Blast, Garou in his Cosmic Fear Mode was still somewhat being manipulated by "God", and that every one of the Hero Hunter's attacks would emit deadly energy that could endanger the life of all living things on the planet, contradicting his hero hunting agenda.

Monster Association Arc
"God" is first seen in a flashback as Homeless Emperor recounts his backstory to Zombieman. He describes how he stumbled upon it in the park one day. It compliments Homeless Emperor for his "correct" ideology but states the human has no reason to die. Instead, it gave him the ability to summon and control energy spheres at will, telling the newly-empowered human he should know what to do with this power and leaving.

During the fight between Orochi and Saitama deep underground, Orochi reveals a tablet he discovered in an ancient shrine, which depicted Orochi and stated that a worthy sacrifice was needed in order to resurrect "God", leading Orochi to believe this was referring to him. Soon after, the hero easily defeats Orochi with a single punch. Before the ancient cave collapses, his remnants crawl to the tablet while the full picture of the actual "God" appears in the mural and is unseen by the Monster King.

"God" is later seen in another flashback as Psykos recounts how she obtained the source of her enhanced power. She describes it as a huge mass of brain cells with a similar appearance to that of Jupiter's surface.

"God" later communicates to Saitama, Flashy Flash, and Manako after they touch a cube. It is surprised that there are three of them, and then tells them to put their hands on the cube in order to either gain powers if they are worthy or face "forfeiture" if they are not. The three of them make no decision as Blast suddenly appears and confiscates the cube himself. Before the hero teleports the cube to an unknown location, "God" makes a final shocked comment as to the presence of Blast. After Homeless Emperor's defeat, when Zombieman begins inquiring more about the entity Homeless Emperor was speaking of, he suddenly sees a colossal figure appear and stand on top of the Moon. The entity then appears in his mind, only with its appearance being changed into a colossal giant of flesh and fractured bones. It then mercilessly takes away Homeless Emperor's light powers and his life, causing his body to disintegrate in the process.

Later on, when Tatsumaki was down and near unconscious, "God" attempts to lure her into taking its powers, using Blast's own form to do so. However; it fails as Tatsumaki realizes that it is not the real Blast and simply asks it regarding its true identity. "God" then simply leaves in irritation. During Garou's fight with Saitama, Garou's attack manages to weaken the dimensional seal keeping "God" at bay. In the sky, several large clouds formed, and through the clouds, God's feet appeared and began walking. As Garou was defeated by Saitama, "God" communicates with him through telepathy and offers him the power to defeat the Caped Baldy. While it impersonates Bang's appearance and offers Garou its hand, despite Garou realizing that somebody was just impersonating his former master and just slapping its hand away, the mere fact of him "touching" the hand of "God" is enough for him to be influenced by the mysterious entity. Before leaving and vanishing from Garou's sight, "God" states that it will make him its "avatar", with the Hero Hunter afterward nearly losing consciousness from the intense flow of power through his entire body.

Despite having received powers from "God", Garou was still incapable of defeating Saitama. Upon discovering Tareo's death because of his fault, Garou wishes Saitama to copy his time travel technique and go back to the past in order to change this "ominous future." Shortly after Garou begins to use his technique in front of Saitama, "God" kills the former by turning him into a statue of salt, taking back his powers in the process, although not before Saitama manages to replicate Garou's technique and successfully use it to travel through time.

Saitama returns to the past, arriving at the moment when Garou, shortly after achieving his Cosmic Fear Mode, appeared in front of many heroes. He lets out a powerful punch towards the Hero Hunter's face, defeating the latter before bad consequences could occur again. Soon, Saitama is thrown back into his "past" self and becomes one with him, having forgotten what's happened. Suffered defeat from a mysterious knockout punch, a confused Garou screams in pain as God's powers begin to leave his body, freeing him from the influence of the enigmatic entity.

Abilities and Powers
Crossing the vast expanse of time, our god shall resurrect on this Earth. When on this altar... a worthy sacrifice is offered.

Little is known about the full extent of God's abilities. The appearance of one of God's mysterious cubes was enough for the top-ranked S-Class hero, Blast, to show up. Since the hero is said to only take action when humanity faces a true crisis, it can be presumed that "God" is an extremely dangerous threat.

Supernatural Abilities
Power Bestowal: The enigmatic entity is capable of granting supernatural powers to individuals. It gave Homeless Emperor the incredible power of summoning energy spheres similar to little suns that explode on contact and create huge and flaming bursts. It also gave Psykos and Orochi a massive boost in power during their fusion, enough to slice through the Earth's surface in a single attack, launching a continental landmass over a considerable distance above the ground in the process. Additionally, "God" can grant powers to individuals who place their hands on one of the mysterious cubes and then state their wishes. However, if they are not worthy to be bestowed upon, they will face "forfeiture". It is also capable of taking back the granted powers along with the lives of the wielders.

Thanks to the powers received from "God", Garou awakened to the flow of energy and behaviour of all forces in the cosmos; the Hero Hunter also having become capable of fighting against even a serious Saitama, albeit losing in the end.

Mind Incursion: "God" was able to get inside Homeless Emperor's mind and communicate with him. It was also able to freely change the appearance of its projection in Homeless Emperor's mind. Later, it seemingly used a similar ability on Tatsumaki, changing its appearance to that of Blast and trying to lure her into taking its powers, but failed. Its next attempt on Garou by imposing as Bang, on the contrary, was a success. Despite Garou having managed to not fully become God's pawn and retaining his sense of self, the mysterious figure could still mentally influence Garou and make him significantly more cruel than before.

Telepathy: "God" can mentally communicate with humans on Earth. It first used telepathy to communicate with Flashy Flash, Saitama and Manako after they had touched a mysterious cube, which allows for contacting the mysterious entity. Though, it is possible for communication with "God" without touching the aforementioned cube, as seen when Garou was approached by the mysterious entity after being beaten by Saitama.

Dimensional Manipulation: While being trapped in another dimension, "God" can still communicate with others on Earth, as seen when it appeared before Tatsumaki and offered her powers. Blast also stated that "God" was close to breaking through a dimensional barrier and its feet were shown walking coming out of dimensional rifts. Even when not fully released into the physical world, "God" can cast images of itself and conversely hide itself from those it does not wish to see it, as the heroes on scene only saw the dimensional rifts as storms without seeing feet extending from them.

Quotes

 * (To Homeless Emperor) "I will grant you power. What to do with this power, you should know."
 * (To Saitama, Flashy Flash and Manako) "Three visitors at the same time? How unusual. Let me see if you are worthy vessels to bestow my power upon."
 * "Place your hand on that box and make a fervent wish. If you are worthy, you shall gain power from it. But if not, you will face forfeiture."
 * (To Homeless Emperor) "Silence. I am taking them back. Your power, your life, they are both forfeit."
 * (To Tatsumaki) "Come. Take my power, and we can strike down your enemies together."

Trivia

 * Murata stated that Homeless Emperor's energy-based powers are the same as Choze and Vaccine Man's.
 * Like Homeless Emperor, Vaccine Man also claimed to be on a sacred mission to destroy humanity, but stated that it was "Mother Nature" he served, rather than "God".
 * It is implied that there is a connection between "God" and the Moon. There are multiple showings with the moon appearing during the big fight between the Hero Association and Monster Association, as if it is an eye watching the battlefield. This is indicated when "God" has emerged and stood on top of the moon before taking Homeless Emperor's powers and his life.
 * "God" has many similarities with the Great Old Ones from H.P. Lovecraft's Cthulhu Mythos, as it is a being that exists in another dimension, and seems to be able to physically interact with the universe yet not quite be fully present in this dimension. It also shares similarities with the Outer God Nyarlathotep as it makes deals with mortals and despises humans yet enjoys toying with them while having seemingly inscrutable motives.

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Dieu Бог Dios