Formerly a hardcore gamer Lee Han-soo who spent nine years mastering the brutal indie RPG Dungeon and Stone, he transmigrates into the body of Bjorn Yandel, a giant barbarian warrior. Armed with deep meta-knowledge of game mechanics, drop rates, and boss patterns, Bjorn operates with cold pragmatism and extreme tactical calculation. He acts like a typical dim-witted barbarian in public to hide his modern soul, while privately building an unkillable defensive juggernaut to survive Raphdonia's lethal tax system and political corruption. Combat abilities and traits: Shields-and-mace tanking build; utilizes the Immortal Seal / Undead's Seal for high-speed regeneration, the Corpse Golem Essence (granting massive physical defense, body expansion, and stat scaling), and the Vampire Duke Cambormir Essence (granting Flesh Explosion, blood magic, and superior physical traits). Wields high-grade Litinium defensive equipment.

A talented elven archer on the run from the high-stakes political reach of the Crystal Union. Initially terrified and severely injured on the early floors of the Labyrinth, Erwin forms an emergency survival bond with Bjorn. She relies heavily on Bjorn’s tactical brilliance and protecting presence, evolving into a fiercely loyal long-range specialist who would sacrifice her life to safeguard Bjorn's secrets. Combat abilities and traits: Bow-and-arrow marksmanship, high agility, spirit magic tuning. Reinforced by the rare Goblin Archer Essence, granting her supernatural stealth, shadow concealment, and boosted projectile speed.

The second daughter of Pheneline and a fierce, bloodthirsty barbarian warrior. Aynar lives by the pure code of the Barbarian Tribe, respecting physical strength, direct combat, and unconditional loyalty. She views Bjorn as a legendary warrior destined for greatness and eagerly accompanies him into high-risk dungeon dives, eventually undergoing grueling shrine isolation training to match his soaring power. Combat abilities and traits: Dual-wielding heavy weapons and greatswords; aggressive, rage-fueled vanguard combat style. Absorbed the Bone Knight Essence, granting enhanced skeletal density, defense amplification, and resistance to physical impacts.

An extraordinarily talented, albeit proud and arrogant, 6th-rank human mage. Trapped alongside Bjorn in the Blood-Tinted Castle Rupture, Raven is forced to trust Bjorn's absolute command to survive the terrifying mutated bosses inside. Her sharp intellect and high social standing render her an invaluable legal witness during Bjorn’s public confrontation with corrupt Explorer Guild managers. Combat abilities and traits: High-tier fire and offensive elemental magic, magic barrier generation, spell-casting speed amplification, tactical battlefield analysis.

A battle-tested 6th-rank dwarf tank with years of labyrinth experience. Pragmatic, sturdy, and honest, Hikurod fights alongside Bjorn during the horrific Vampire Duke encounter. Recognizing Bjorn's unparalleled leadership and defensive fortitude, he becomes a co-recruiter and dependable frontline partner for deeper labyrinth pushes. Combat abilities and traits: Dwarven defense techniques, heavy shield specialization, weight-manipulation earth magic (enhancing personal mass for impact defense and grounding forces).

An ancient Rank-5 noble vampire sealed within the spatial anomaly of the Blood-Tinted Castle. Arrogant, sadistic, and ancient, Cambormir views human and barbarian explorers merely as blood cattle to fuel his awakening and domain expansion. Combat abilities and traits: High-speed flight, blood manipulation, supreme physical regeneration, domain control, lethal blood-blade strikes, area-of-effect life drain.

A veteran explorer who targets naive novitiates on the upper floors of the Labyrinth. Hans presents himself as a friendly guide to newly transmigrated or novice explorers before backstabbing them in low-visibility zones to steal their loot and cover his monthly taxes. Combat abilities and traits: Rogue tactics, short-sword proficiency, trap setting, deception, stealth tracking.

A skilled cat-beastkin explorer who joins Bjorn's newly formed official exploration party following his public exoneration. Fast, perceptive, and highly agile, Misha seeks high-yield dungeon ventures to secure financial stability and overcome systemic prejudice against beastkin in Raphdonia. Combat abilities and traits: Beastkin sensory enhancement, lightning-fast daggers/claw attacks, high evasion, scout and trap-detection capabilities.

A strategic and studious human mage recruited into Bjorn’s team to provide versatile ranged magic support and utility spells for deeper floor exploration. Combat abilities and traits: Multi-elemental magic (fire/ice utility spells), mana conservation techniques, tactical spell-storing rings.

A solid human melee specialist recruited by Bjorn and Hikurod to fill out their party's damage-dealing rotation and off-tank requirements for deep Labyrinth runs. Combat abilities and traits: Heavy martial weapon mastery, high stamina, basic martial active abilities.