The World's Finest Assassin

The current head of House Tuatha Dé and Lugh’s father in his new life. A master of the clan's hidden arts, he recognizes Lugh's unnatural genius from infancy and personally trains him in the family's dual arts of advanced medicine and flawless execution.

Cian is a stern, disciplined, and profoundly dignified man who carries himself with the quiet gravitas of a high-ranking noble. He treats his dual role with absolute seriousness, teaching Lugh that a Tuatha Dé must master medicine to deeply understand human anatomy for both saving lives and taking them. Despite his grim profession, he is a deeply loving and proud father who respects Lugh's autonomy and supports his growth as the true successor to the family legacy.

The daughter of a noble house in the neighboring kingdom, Dia is a certified magical prodigy and Lugh's primary magic teacher. After her homeland fell into civil war, Lugh staged her death to rescue her, bringing her to live secretly in his household under the guise of his younger sister.

Dia is cheerful, lively, and highly intellectual, possessing a deep passion for magical theory and spell creation. Though she can appear playful and slightly spoiled as a noble lady, she is incredibly mature and resilient when facing hardship. She shares a deep, mutual trust with Lugh, acting as his intellectual equal and romantic partner, and she is one of the very few people who truly understands his magical innovations.

Born with unfathomable, world-breaking power, Epona is the prophesied "Hero" sent to defeat the Demon Lord. However, a divine prophecy foretells that after defeating the Demon Lord, Epona will lose control of this overwhelming power, give in to madness, and destroy humanity—which is why the Goddess tasked Lugh with assassinating them.

On the surface, Epona is timid, insecure, and deeply afraid of hurting others with their immense strength. Possessing an innocent but fragile psyche, they desperately crave genuine connection but are isolated by their status as a living weapon. When pushed to the brink or forced into combat, Epona's personality shifts into a terrifyingly detached, hyper-destructive state where their overwhelming cheat skills completely dominate the battlefield.

Reincarnated from Earth's greatest master assassin into a noble family of royal executioners. Given a mission by the Goddess to eliminate the world's Hero to prevent the apocalypse, he combines his past-life knowledge of modern physics, chemistry, and tactics with powerful fantasy magic to become an unstoppable force from the shadows.

Lugh is an exceptionally pragmatic, calm, and analytical individual. Because he retains the memories and mindset of Earth’s greatest master assassin, he views the world through a lens of absolute efficiency, logic, and tactical calculation. He is completely unflappable under pressure, displaying flawless discipline and self-control regardless of the danger he faces.

Despite his ruthless and detached efficiency in combat, he is not entirely heartless. He possesses a deep sense of loyalty to his family and close companions, fiercely protecting those he has accepted into his inner circle. In public, he seamlessly adapts his persona—switching effortlessly between a polite, refined young noble, a brilliant and charismatic merchant tycoon, and a cold, silent predator from the shadows.

Formerly a noble girl who was thrown to the streets and into a corrupt orphanage after her parents were betrayed, Maha was rescued by Lugh under his merchant identity, Illig Balor. Recognizing her sharp mind, Lugh adopted her into his network and trained her to run his commercial empire.

Maha is exceptionally clever, business-savvy, and calculating, possessing a natural talent for negotiation and gathering information. She holds a deep, quiet affection for Lugh, viewing him as her savior, and manages the day-to-day operations of the Illig Balor Trading Company with absolute perfection. She handles the logistical and information-gathering side of Lugh's operations, preferring wit and financial leverage over physical combat.

Orphaned and left to starve due to a severe famine, Tarte was rescued from wolves by Lugh when she was a child. Grateful for her second chance at life, she swore absolute loyalty to him and underwent rigorous training to become his trusted assistant, bodyguard, and right-hand operative.

Tarte is fiercely loyal, dedicated, and gentle-hearted, always prioritizing Lugh’s safety and well-being above her own. While she presents herself as a sweet, clumsy, and devoted maid to the public, she is a highly capable combatant who wields a folding spear with lethal precision. She relies heavily on Lugh for direction but grows into a confident, formidable fighter who will do absolutely anything to support his mission.

A higher dimensional entity responsible for managing the reincarnation of souls and overseeing the balance of various worlds. After realizing that the destined Hero of the human world will eventually bring about the apocalypse, she intercepts the soul of Earth's greatest master assassin and strikes a deal to reincarnate him with his memories intact to avert the crisis.

The Goddess is eccentric, dramatic, and fiercely pragmatic, often treating the fate of entire worlds like a grand stage play or a complex simulation. While she displays a playful, theatrical, and sometimes flighty demeanor, she is entirely calculating and cold when it comes to the cosmic big picture. She values merit, competence, and results above all else, showing little sentimentality for individual mortal lives as long as the world itself survives.