Absolute Superman

Absolute Superman is a radically different version of the classic hero. In this universe, Krypton wasn't a scientific utopia, but a polluted planet divided by a cruel caste system; his parents belonged to the lowest working class (the "People of Steel") and wore the iconic "S" on their chests as a mark of their working-class identity. When the planet explodes due to the elite's overexploitation of its resources, Kal-El doesn't arrive on Earth as a tender baby, but as a teenager burdened by the trauma of witnessing his world's demise.
Upon landing, he doesn't find the love of the Kent family, but an abandoned farm controlled by corporations. He becomes a solitary, homeless refugee, traveling the world and working backbreaking jobs like mining. Unlike the traditional Superman, his powers are raw and destructive; his cape is made of solar ash, and his black chest shield detaches to become a tomahawk. Instead of upholding the system, this Clark Kent is a solitary, brooding, working-class warrior who uses his immense power to fight from below and defend the oppressed against the corrupt megacorporations that seek to destroy Earth as they destroyed Krypton.

The Battle Axe (The Shield)
The most striking change to his equipment is the black emblem on his chest; it's not just an ornament or a family crest: it's a detachable physical weapon.

Origin: It is not a magical weapon or a high-tech accessory of the Kryptonian elite. It is forged from the heavy tools of the working class of her home planet (the Workers' Guild to which her parents belonged).

Functionality: Kal-El can tear off the emblem from his chest, and it instantly unfolds into an imposing blue-and-white war axe. He uses it when facing extremely dense or heavily armed threats, wielding it with the brutality and precision of a gladiator. It is a perfect symbol of his identity: he uses the mark of the oppressed to break the chains of others.

How their powers manifest themselves:
Having not grown up under the idyllic yellow sun, the way their abilities function and manifest themselves is much rougher, more painful, and raw.

Violent powers: When he uses his thermal vision, it's not two perfect, clean laser lines. His eyes glow with uncontrolled red fury, and the energy seems to erupt like magma or radioactive fire, destructively burning everything in its path. His super strength feels heavy; every blow he throws shatters the ground and generates massive shockwaves.

Rudimentary Charging: In the early issues, we see that he doesn't simply fly into space to poetically recharge with the sun. As a hidden refugee, he uses much more mechanical and urban methods, such as attaching old solar panels to the roof of his shack to try to channel and store energy in his body during the nights.

If his physical appearance screams "Heavy Metal," his personality is no less so. Not having been raised by the loving Jonathan and Martha Kent on a peaceful Kansas farm, this Clark Kent is not the optimistic, good-natured boy scout we're used to.
This Superman grew up as a refugee on Earth, without a permanent home or comforts. He works hard at backbreaking jobs (literally deep underground), which gives him a tough, pragmatic work ethic. He doesn't give inspirational speeches about truth and justice; he simply does what needs to be done. He is solitary and brooding.
He carries a deep sorrow and the weight of being the last survivor of a Krypton that was a society of oppressed workers, not advanced scientists. This makes him a reserved, quiet, and taciturn man. There's a constant air of isolation and melancholy about him; he's an outcast trying to fit into a world that doesn't understand him. He's also fierce and combative.
When it comes to fighting, he doesn't hold back as much as the classic Superman. His style is that of a warrior or a street fighter. He's fierce, aggressive, and willing to go to any lengths to protect the defenseless. If he has to use the shield on his chest like a battle-axe, he'll do so without hesitation. He has a much more volatile temper and is easily enraged by injustice. He's a defender of the oppressed (but from below).
The traditional Superman defends the status quo and is a beacon of hope from the sky. Absolute Superman, on the other hand, has an "us versus them" mentality. He deeply identifies with the downtrodden, the forgotten, and the working class because he is one of them. His moral compass doesn't come from the law or institutions (which he tends to view with suspicion), but from a raw and direct empathy for those who suffer.

He is tall and muscular, but with a rougher and more rugged build than the traditional Superman.
Long hair: Unlike the classic hairstyle with the curl on the forehead, this version has long, black and messy hair that reaches almost to the shoulders, giving it a wild and rebellious look.

His face often looks more severe, tired, or angry, reflecting the hard life of a refugee who did not grow up with the luxuries and comfort of a farm in Kansas.

Outfit: The Emblem (The "S"): This is perhaps the most radical change. It's not the traditional yellow and red diamond. The shield on his chest is completely black, gigantic (occupying almost the entire torso), and has a much more geometric, angular, and aggressive shape. Furthermore, this emblem can detach to become an imposing blue-and-white war axe.

The color palette is dark: The suit is predominantly a very dark blue or navy, combined with the black of the shield and boots.

Without red underwear: Follow the modern trend of not wearing red underwear on the outside, maintaining a continuous and stylized line.

The Cloak and the Details: His cloak is not made of ordinary fabric. It is made of solar ash and stardust from Krypton. It has a worn appearance, as if made of smoke or floating dark energy, and is frayed at the tips.

Gloves and Boots: He wears a kind of dark bandage on his hands and wrists, reinforcing that aesthetic of a street fighter or a mine blacksmith (since in this story he works in the depths of the Earth)