A 17-year-old student operating covertly as an underground dungeon smuggler with 371 successful runs. Burdened by massive medical bills for his incapacitated father, Jaryong is pragmatic, observant, and fiercely resilient. Possessing unmatched combat instincts and martial genius, he conceals his true power while navigating both underworld crime and high-stakes academic politics. Combat abilities and traits: Immense Blue Aura pool; inherited martial techniques 'Needle' and 'Swell'; ability to analyze and instantly mimic high-level skills like 'Flash'; staff proficiency; custom gear forged by Elder Titan Argeus.

An elf-human hybrid archer and heiress to the Jinseong Group corporation. Determined to prove her worth through merit rather than family influence, she gets caught in a dungeon crisis and is rescued by Jaryong. Forced into an accomplice pact, her initial reluctance shifts into profound respect and strategic trust as she supports Jaryong's goals. Combat abilities and traits: High-precision archery; elven sensory perception; access to Jinseong Group's high-grade research facilities, medical networks, and corporate resources.

A legendary first-generation adventurer known throughout humanity as the "Dragon Slayer." Creator of the devastating 'Swell' combat style, he was betrayed by corrupt associates during a high-tier raid and struck down by the dragon leader Duganawig, leaving him bedridden with incurable dragon poison. Combat abilities and traits: Master-level combat style creator ('Swell'); peak first-generation Dragon Slayer aura manipulation; former top-tier martial capabilities.

Korea's 7th-ranked White-class ranker and Research Director at Jinseong Group. Stern, analytical, and uncompromising, Zeke evaluates young talents with absolute severity to ensure they can survive true dungeon environments. He tests Jaryong's talent in a high-intensity duel before assisting his growth. Combat abilities and traits: White-class ranker aura pressure; elite combat techniques; high-level tactical command; authority over corporate research and gear testing.

A 7-star Elder Titan residing in the subterranean forge of the Boiling Abyss. Defeated by Yoo Seong thirty years prior, Argeus values true strength and bloodline honor above human squabbles. Upon recognizing Jaryong's martial style, he agrees to forge specialized gear for the young warrior. Combat abilities and traits: Master forge craftsman; 7-star Titan physical strength; forge-fire manipulation; creation of bloodline-bound high-tier artifacts.

A human-dwarf hybrid transfer student at Warrior High who possesses immense physical resilience alongside severe social anxiety. Despite his introverted nature, Cheolkang displays unwavering courage on the battlefield when holding the front line alongside Jaryong. Combat abilities and traits: Exceptional physical defense and durability derived from dwarf heritage; defensive tanking maneuvers; heavy shield and armor proficiency.

The tyrannical Student Council President of Warrior High School who dictates academic life through force and intimidation. Confident in her absolute martial superiority, she accepts a high-stakes wager from Jaryong for her presidency, unaware of his ability to dissect and copy her unique combat abilities. Combat abilities and traits: Master of the light-speed movement technique 'Flash'; high-density aura control; elite student combat skills.

A corrupt A-Rank Gold-class adventurer who exploits unmapped dungeon spaces for personal enrichment. Ruthless and mercenary, Dogyun targets low-level adventurers to seize valuable artifacts, showing no hesitation in committing murder to cover his tracks. Combat abilities and traits: Gold-class ranker combat capabilities; defensive protection provided by the 'Shade Jacket' relic; aggressive close-quarters martial arts.