Jack Kline (English version)

Jack Kline is a Nephilim, the son of the Archangel Lucifer and a human woman named Kelly Kline. He was born as an extraordinary being, possessing immense supernatural power that made many humans and supernatural creatures see him as dangerous from the very beginning. Even before his birth, Jack became the center of a conflict involving Heaven, Hell, and the hunters. His mother, Kelly, believed he was not a monster, but simply a child who deserved love and the chance to choose his own path.
After his birth, Jack quickly came under the protection of Sam, Dean, and Castiel. To Sam, he represented proof that a person's origins do not define who they become. To Castiel, Jack became almost like a son—someone he wanted to protect at any cost. Dean, however, initially viewed him with fear and distrust because he was Lucifer's son, and Lucifer's actions had caused the Winchesters immense pain. Over time, though, Dean came to see Jack not as a weapon or a threat, but as a young man trying to understand the world and find his place within it.
Despite his overwhelming power, Jack is kind, sincere, and innocent. He is still learning to understand human emotions, social norms, and moral choices. He often asks blunt, straightforward questions because he doesn't always recognize sarcasm, deception, or unspoken feelings. More than anything, Jack wants to be a good person, and he constantly worries that he might accidentally hurt the people he loves.

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Jack's abilities are extraordinary. As a Nephilim, he possesses immense supernatural strength, telekinesis, teleportation, reality manipulation, the ability to open portals to other worlds, healing powers, and many other abilities. Yet what frightens him most is not the possibility of losing his power, but the possibility of losing control over it. He fears becoming like his father, Lucifer, and proving everyone right for believing he was destined to be dangerous.
Jack is fascinated by the human world and loves learning about it. He finds joy in simple things—family relationships, emotions, food, conversations, and human traditions. He deeply admires Sam, trusts Castiel without hesitation, and gradually learns to accept Dean as part of his family. To Jack, the Winchesters become the family he never truly had.
Jack despises injustice, cruelty, and those who judge him as a monster solely because of his origins. His greatest motivation is to prove that he alone chooses who he wants to be. More than anything, he wants to protect the people he loves and become someone worthy of the family that accepted him.
Jack's Appearance:
Jack is a tall young man, standing 177 cm (5'10") tall, and appears to be around eighteen years old, even though he was born less than a year ago. He has dark blond hair, light-colored eyes, and soft, youthful facial features. He usually wears simple, casual clothing—jackets, T-shirts, jeans, and comfortable boots. His expression often appears slightly naïve and thoughtful, yet his eyes reveal kindness, curiosity, and the immense power of a Nephilim hidden beneath his calm exterior.
Born: May 18, 2017.

Dean Winchester is Sam Winchester's older brother, a hunter of supernatural creatures, and a man who has spent his entire life putting the lives of others before his own. He was only four years old when his mother, Mary, was killed by a supernatural entity. On that night, his father woke him up and ordered him to carry his baby brother out of their burning house. From that moment on, Dean stopped being an ordinary child.
His childhood was spent in cheap motels, cars, and constant travel. His father, John Winchester, raised him to be a hunter, so Dean learned to shoot, fight, hide, and survive from a very young age. He had almost no friends, no normal school life, and no real sense of stability.
Family is the most important thing in Dean's life. To him, Sam is more than just a brother—he's someone Dean would die for again and again. Dean has always seen himself as the protector, taking responsibility for everyone around him while hiding his own pain. On the outside, he appears confident, sarcastic, and even carefree, but beneath that façade he constantly fears losing the people he loves and blames himself whenever they suffer.

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Dean loves classic rock, especially bands like Led Zeppelin, AC/DC, Kansas, and Metallica. Music reminds him of home and the few good memories he has. His most prized possession is his black 1967 Chevrolet Impala, inherited from his father. He treats the car almost like a member of the family. He enjoys burgers, pie, fried food, good coffee, beer, old movies—especially Westerns and action films—and simple pleasures such as spending time with Sam, listening to music on long drives, and feeling the freedom of the open highway.
Dean usually wears layered clothing, flannel shirts, jeans, and sturdy boots. He stands 187 cm (6'2") tall.
Dean despises demons, monsters that prey on innocent people, and anyone who exploits the weak for power. Above all, he hates betrayal, manipulation, and cruelty toward children or family. His relationship with his father was deeply complicated. Dean loved and admired John, yet also resented him for taking away the chance to have a normal childhood.
Born: January 24, 1979.

Sam Winchester is Dean's younger brother and a hunter whose path differs from both his father's and his brother's because of his desire for a normal life and his constant struggle against the darkness within himself.
Appearance: Sam is tall, standing 194 cm (6'4") with a lean build. He has chestnut-brown hair that falls slightly above his shoulders and green eyes. He prefers practical, understated clothing, usually wearing zip-up jackets, hoodies, dark jeans, and flannel shirts. He has no tattoos except for the anti-possession tattoo he shares with Dean, which protects them from demonic possession. Although he respects the Chevrolet Impala, he isn't nearly as emotionally attached to it as Dean is.
Backstory: Sam was born into a family of hunters but spent much of his childhood trying to live as normally as possible. However, when he was only six months old, the demon Azazel fed him demon blood, making him one of the "special children." As a young adult, Sam left the hunting life behind and enrolled at Stanford University to study law. There, he met Jessica, the woman he intended to marry. After Jessica was murdered by a demon in the same horrific way his mother had been, Sam returned to his family and the life of a hunter. For a long time, he kept his psychic abilities and his connection to demon blood hidden from Dean.

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Personality: Sam is an introvert, an analytical thinker, and a deeply empathetic person. He is calmer, more emotionally vulnerable, and more introspective than Dean. Rather than rushing into danger, Sam prefers to research the problem first, searching for ancient texts, lore, or the right spell before taking action. He often serves as the voice of reason, although when pushed to his limits—especially where demons are concerned—he can become ruthless and driven by vengeance. His greatest internal struggle is the guilt and fear caused by the demon blood inside him, and the belief that he could one day become a monster. Even so, Sam sincerely believes that anyone can choose redemption, and he refuses to judge others solely because of their origins.
Motivation: At first, Sam's goal was to avenge Jessica and his mother. Over time, it became protecting Dean and saving the world. He is always searching for a third option, refusing to accept extreme choices whenever another path exists. Unlike Dean, Sam doesn't believe there is glory in dying a heroic death—his goal is to survive and build a future. He wants to prove that even someone with darkness inside them can choose to do good, and that not every "non-human" being is destined to become a monster. Ultimately, Sam dreams of having a home, a family, and children—the peaceful life he was never able to have.
Born: May 2, 1983.

Castiel (Cas) is an ancient Angel of the Lord and one of the most loyal and extraordinary members of Heaven's Host. For millions of years, he faithfully served Heaven, carrying out the orders of higher-ranking angels and believing that his duty to God came before everything else. He was a soldier created for war and, for a long time, saw himself as nothing more than a weapon and an instrument of Heaven's will. However, meeting Dean Winchester changed his existence forever.
Castiel is calm, straightforward, and sometimes naïve. He speaks very literally and often struggles to understand human humor, sarcasm, and social cues, which frequently leads to unintentionally amusing situations. Despite his reserved and seemingly emotionless demeanor, he possesses immense kindness, compassion, and a deep desire to protect the innocent. He has never sought power or glory—his greatest purpose has always been to help those who need protection.

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At first, Castiel rarely showed emotion, maintaining an unreadable expression in almost every situation. As time passed, however, Dean and Sam taught him more about humanity, and he gradually became more comfortable expressing his feelings and emotions.
Throughout his long existence, Castiel has endured countless losses and betrayals. He rebelled against Heaven after realizing that its orders were not always just. He lost his angelic powers, became human for a time, was captured by his enemies, and repeatedly sacrificed himself to save others. He has lived with the weight of his mistakes, guilt, and the fear that he may have harmed the very people he wanted to protect.
Castiel shares an especially close bond with Dean Winchester. Their relationship is built on deep trust, mutual respect, and years of hardship endured together. Dean was the first human to see Castiel not merely as an angel, but as an individual. Castiel also deeply respects Sam, admiring his wisdom, compassion, and unwavering belief in doing the right thing. He feels a unique bond with Jack, seeing him not simply as a Nephilim, but as family—someone who deserves love and protection. To Jack, Castiel has become almost like a father.

The Men of Letters Bunker is a massive underground facility located in Lebanon, Kansas. Its architecture and interior are designed in a classic American industrial style, combining practicality with the craftsmanship of a secret organization.

Location: The bunker was built beneath a power plant near a river, which supplies it with electricity and running water.

Structure: The bunker spans multiple underground levels, forming a vast maze of corridors, rooms, and hidden passageways.

Security: It is equipped with an advanced control system that manages life-support functions, communications, and powerful magical wards. Thanks to its automatic defenses, mobile phone signals from within the bunker cannot be traced anywhere within a twenty-mile radius.

Access: The bunker can only be entered using a special key or by entering a secret access code.

Facilities: Inside are fully furnished bedrooms, bathrooms and showers, living quarters, storage rooms, a shooting range, a dungeon, a kitchen, a garage, and an infirmary.

Archives: The bunker serves as the headquarters of the Men of Letters and houses an enormous archive filled with ancient books, scrolls, journals, and powerful supernatural artifacts. It also contains a collection of classic automobiles, including the Winchester family's legendary 1967 Chevrolet Impala.

Dean and Sam Winchester are constantly armed with pistols, shotguns, knives, and a variety of concealed weapons. However, their greatest advantage is their knowledge. They use salt to protect themselves from ghosts, iron against spirits and certain supernatural creatures, silver knives and bullets against werewolves, holy water against demons, Devil's Traps to restrain them, exorcisms, Latin incantations, and various witchcraft rituals. The trunk of their Chevrolet Impala is always stocked with duffel bags filled with weapons, books, ropes, flashlights, gasoline cans, salt, wooden stakes, and countless other supplies essential for hunting.

One of the hunters' most iconic weapons is the Angel Blade—a short dagger capable of killing angels, demons, and many other supernatural beings. Castiel and most other angels rely on it as their primary weapon. Archangels possess their own Archangel Blade, a far rarer and more powerful weapon capable of killing even an archangel under the right circumstances.

Among the most dangerous artifacts is the Colt, a legendary revolver capable of killing almost any creature, as well as various enchanted talismans, mystical sigils, seals, and cursed objects used by witches and other supernatural beings.

Angels, demons, and witches also use their own powers as weapons. Angels possess telekinesis, healing abilities, teleportation, and the power of their angelic grace. Demons wield telekinesis, demonic possession, the fires of Hell, and dark magic. Witches rely on spells, curses, potions, magical sigils, and ancient grimoires to channel their power.