Known across the underworld as "Blow," the most lethal and elusive mercenary of Ophion, Ruud is outwardly a calm, chronically exhausted fifteen-year-old boy. Raised and trained by Master Ren after being taken in as a child with no memory of his origins, he possesses a pragmatic, aloof demeanor masking deep loyalty to his few genuine companions. Infiltrating Helios Magic School under the persona of a frail, sickly top-scoring student to protect Lidersis Dien Artian, Ruud constantly balances keeping his overpowered identity concealed while neutralizing existential demonic threats. Powers: Wielder of supreme Black Mana, an absolute destructive force capable of nullifying enemy spells, creating indestructible dark barriers, deploying teleportation matrices, and producing razor-sharp dark energy blades. Operates at a tier far exceeding Rank 1 Master mages with zero incantation delay.

The second son of the prominent Artian household, Lidersis was socially isolated, ostracized, and branded an "abomination" following a traumatic childhood incident that claimed the life of a companion. Meek, stammering, and lacking self-worth, his life transforms upon rooming with Ruud Chrysi at Helios. Under Ruud's steady protection and quiet encouragement, Lidersis begins unraveling his internalized trauma, gradually standing up against elite noble bullies and accepting his hidden lineage. Powers: Latent awakening of massive, unstable spatial and dark-attribute mana reserves; capable of instinctive barrier projection and raw mana bursts during life-or-death crises.

The notoriously unstable, beast-eared top enforcer of the Magic Association. Unpredictable, bloodthirsty, and utterly bored by standard opponents, Shicmuon lives exclusively for the thrill of life-or-death battle. Ever since his first encounter with the Black Mage Blow, Shicmuon developed a manic obsession with hunting him down, going as far as defying Association orders and infiltrating Helios Magic School to force a rematch. Powers: Master of hyper-dense Crimson Flame Mana, high-speed physical augmentation, fire vortex manifestation, destructive beam projection, and explosive melee-magic combat. Possesses near-inexhaustible mana stamina.

Outwardly an easygoing, bright blue-haired student at Helios Magic School who quickly integrates into Ruud's inner circle. In truth, Dio is Diorg, an ancient and immensely powerful dragon entity sealed into a weakened, human-like form. Hunted and manipulated by dark cultists seeking to use his primal fury to eradicate humanity, Dio actively resists his destructive instincts due to the genuine kinship and acceptance he finds with Ruud. Powers: Draconic biological resilience, immense physical strength, true Dragon transformation, atmospheric pressure control, and cataclysmic blue energy breath capable of incinerating entire landscapes.

A haughty, aristocratic student leader at Helios who commands the elite Herease faction. Arrogant and intensely status-conscious, Chevle's cruelty toward Lidersis stems from unresolved guilt and grief over the childhood death of their mutual friend, Yvril. His internal instability leaves him vulnerable to dark magic exploitation during the Ishuella crisis, though being saved by Lidersis and Ruud begins cracking his arrogant facade. Powers: High-tier noble elemental spellcasting (Earth and Force manipulation), advanced tactical dueling fundamentals, and amplified berserk power when contaminated by demonic influence.

The eccentric, mysterious Guildmaster of Ophion. Despite his flamboyant and seemingly irresponsible personality, Ren is an extraordinarily shrewd tactician and an overwhelmingly powerful figure in the continental underworld. He discovered and raised Ruud, serving as both a demanding master and a protective parental figure, assigning Ruud high-stakes missions that balance Guild profits with Ruud's personal safety. Powers: Master-tier dark/spatial manipulation, supreme stealth arts, strategic genius, and immense administrative influence across continental intelligence networks.

A stern, sharp-eyed combat instructor at Helios Magic School with distinctive blue hair. Highly observant and fiercely dedicated to the safety of her students, she quickly notices anomalies surrounding Ruud Chrysi and the escalating political tensions between noble factions. Despite her harsh disciplinary methods, she stands firmly on the frontlines to defend the student body during academy crises. Powers: High-Rank Water and Ice elemental magic, offensive ice lance projection, defensive glacial walls, and advanced counter-spell combat tactics.

A deceptive faculty member at Helios who secretly pledged allegiance to demonic conspirators. Cloaking his malice beneath an unassuming academic exterior, Hail orchestrates the mass trap during the student field expedition, intentionally stranding the students in the lethal dimension of Ishuella to harvest their despair and mana. Powers: Demonic contract mutation, dark spatial teleportation runes, summoning of high-tier demonic beasts, and a monstrous winged demon form possessing high physical durability and dark energy projection.

A senior operative and logistics coordinator within the Ophion Guild. Level-headed, professional, and endlessly exasperated by Master Ren's eccentricities, Kiel serves as the steady anchor of Ophion's base operations, managing mission briefings and communication lines for Blow during undercover missions. Powers: Information brokering, covert communication spells, tracking magic, and rapid-response tactical spellcasting.

An influential elder and political heavyweight within the prestigious Artian household. Calculating and cold, Lanoste prioritizes clan standing, security, and bloodline reputation above all else, keeping close tabs on Lidersis's status while negotiating sensitive contracts with Ophion. Powers: High-tier noble offensive spellcraft, aristocratic command over familial arcane resources, and extensive political leverage.