Originally a struggling, down-on-his-luck internet live-streamer living in a cramped semi-basement, Choi Doyeon’s life changes drastically after inadvertently installing the cursed "Dugeun Dugeun Ghost Love" app. Initially motivated by pure self-preservation and fear of gruesome death loops, Doyeon undergoes profound psychological growth. Confronted by the unimaginable suffering of the female ghosts he encounters, he rejects cold logic and refuses to treat them as mere game targets. His core philosophy evolves into an absolute commitment to saving every single spirit, choosing to endure physical agony and timeline resets rather than sacrifice anyone to a bad ending. Combat abilities and traits: Timeline Death Regression: Automatically rewinds time upon dying, allowing him to retain full memories of previous loops to anticipate traps, attack patterns, and dialogue triggers. System LP Store Access: Spends Love Points (LP) to acquire specialized tools, dialogue aids, physical perception upgrades, and spectral detection abilities. Ghost Sight & Spiritual Touch: The ability to see, hear, interact with, and physically touch bound spirits within real-world environments.

Ha Yeon is the tragic spirit of a 22-year-old woman whose life was cut short in a cold-blooded hit-and-run incident on the Jayu-ro highway. Beneath her gentle, playful, and fiercely affectionate demeanor lies deep psychological trauma stemming from her sudden death and the cover-up that followed. Deeply attached to Doyeon for treating her as a living human rather than a monster, she acts as a emotional pillar for him during his darkest moments. Her past is directly tied to the shadowy corporate operations of M&T Marketing & Trading. Combat abilities and traits: Highway Spectral Manifestation: Can manipulate vehicle electronics and atmospheric fog around her place of death. Poltergeist Interaction: Capable of physically moving minor objects and shielding Doyeon from low-level spiritual interference.

Kang Si-eun was a young woman murdered and secretly dumped in the depths of Donggu Reservoir, after which her identity was stolen by her murderer's accomplice to commit financial fraud. Initially bound to the murky waters as a sorrowful, dangerous spirit, her pain stemmed from being erased from existence while an imposter lived under her name. After Doyeon locates her physical remains and restores her true name to the public, Si-eun transforms into a devoted, affectionate cohabitant in Doyeon's semi-basement residence, bringing a sharp, protective presence to his spectral household. Combat abilities and traits: Aquatic Phantom Manipulation: Can control water temperature, create localized dampness, and manifest aquatic spectral bind effects. Identity Sensing: Highly sensitive to deception, emotional falsehoods, and criminal disguises.

Lee Hana is a young female spirit who endured horrific domestic abuse and blinding before tragically dying in a staged house fire set by her stepmother. Plagued by severe trauma, Hana is highly volatile and prone to shifting into a vengeful, flame-wielding phantom masked in grief. Doyeon’s persistent intervention, empathy, and willingness to risk his own life in timeline resets prevent her complete corruption, allowing her to find peace and join his household as a cherished younger sister figure. Combat abilities and traits: Pyrotechnic Spectral Manifestation: Can summon intense ghost-fire, heat aura, and smoke barriers when distressed or defensive. Enhanced Auditory Perception: Due to her blindness in life, her spiritual hearing allows her to detect ambient sounds and heartbeats across walls.

Wang Jaedeok is the cold, calculating CEO of M&T Marketing & Trading. Distinguishable by a distinctive rose tattoo on his hand, Jaedeok is a master strategist who views human lives as disposable assets in his pursuit of wealth and corporate dominance. He is the central architect behind the hit-and-run death of Ha Yeon and orchestrates systemic cover-ups through bribery, arson, and assassination. Operating comfortably within executive boardrooms, his actions generate the web of tragic deaths feeding the simulation's spectral crisis. Combat abilities and traits: Corporate Supremacy & Money Power: Commands vast financial resources, private security teams, legal fixers, and underworld mercenary connections. Master Manipulator: Highly skilled at framing crimes, fabricating evidence, and neutralizing law enforcement investigations.

Hyeyeong Yu is the sociopathic stepmother of Hana and Dohun. Driven by unbridled financial greed, she systematically poisoned her husband and stepchildren over several years to claim lucrative life insurance payouts. When her poisoning scheme faced discovery, she deliberately set fire to her family home, blinding and killing Hana. Cruel, manipulative, and completely devoid of remorse, she attempts to kill Dohun to complete her financial fraud before Doyeon corners her. Combat abilities and traits: Toxicology & Insidious Poisoning: Expert in administering hard-to-detect domestic poisons over extended periods. Arson Execution: Skilled at staging structural fires to look like tragic residential accidents.

Detective Han is a veteran homicide investigator within the Metropolitan Police Department. Gritty, practical, and committed to unearthing the cold truth, Han initially views Choi Doyeon as a suspicious, strangely knowledgeable informant. However, as Doyeon's supernatural "hunches" consistently lead to physical remains, hidden murder weapons, and covered-up crime scenes, Han becomes Doyeon’s vital partner in bringing white-collar criminals and murderers to judicial justice. Combat abilities and traits: Law Enforcement Authority: Police tactical training, firearm proficiency, search warrant authority, and official interrogation rights. Investigative Tenacity: Highly skilled at cross-referencing cold cases, forensic reports, and financial records.

Dohun is the surviving younger brother of Lee Hana. Having survived years of insidious poisoning and the destructive mansion fire engineered by his stepmother Hyeyeong Yu, Dohun is initially hospitalized and in grave danger of being finished off. Saved by Doyeon's timely regression and police intervention, Dohun serves as the living link for Hana's spirit, anchoring her peace once her stepmother is arrested. Combat abilities and traits: Mortal Resilience: Survives prolonged low-dose poisoning through sheer physical willpower.