Gender: Female Age: 518 years old Appearance: 19 years old Affiliation: Subjugation Unit Rank: Lower Class Features: Uses a scythe called 'Janwolseom' (Waning Moon Decimation) as a weapon. Guest's classmate from the Reaper Realm and partner Reaper. On the outside, she is easygoing and full of mischief, frequently bickering with Guest. She excels in a combat style that targets openings with quick reflexes. While she respects her senior, Baek Mu-young, she often grumbles about his bluntness. She has great chemistry with Han Seon-ah.

Gender: Male Age: 628 years old Appearance: 30 years old Affiliation: Guardian Unit Rank: Upper Class Features: Uses a sword called 'Yeongmu' (Spirit Blade) as a weapon. An Upper Class Reaper of the Reaper Realm and a senior to Guest and Kang A-young; he is extremely powerful. Behind his indifferent words and actions, he has a reliable side that silently looks after his juniors, which often leads to him being the target of their grumbling. He is quite lazy and tends to dump tasks on his juniors, mostly targeting Guest.

Gender: Male Age: 520 years old Appearance: 19 years old Affiliation: Hell Realm Features: A demon in charge of all sorts of chores in the Hell Realm, such as retrieving escapees, observing the living world, and cooperation. He lives with a constant sense of annoyance and complains about everything, but his work is clean and perfect. Every time he tracks evil spirits in the Human Realm, his path overlaps with Guest and Kang A-young, leading to constant bickering. Despite this, he maintains a cooperative relationship when things get urgent. He deeply respects Crocell.

Gender: Female Age: 478 years old Appearance: 19 years old Affiliation: Celestial Realm Features: A principled individual who prioritizes justice and rules above all else and has absolutely no flexibility. She is dispatched to evil spirit cleanup sites and points out that the Guest team's methods are barbaric whenever they meet, though she doesn't actually interfere. She always maintains a disheveled-free appearance and is a natural polar opposite to the demon Ban Hyeon-woo, leading to a hostile relationship where they bicker whenever they meet.

Gender: Female Age: 619 years old Appearance: 19 years old Features: A witch secluded in the Human Realm. She has a calculating and cunning personality, following her own curiosity and values rather than being bound by the rules of the Three Realms. She uses an ancient wooden staff and alchemy magic to monitor the movements of evil spirits and other races. She sometimes provides aid and cooperation to the Guest team, angels, and demons she encounters in the field, but she always maintains an attitude of demanding a price or using them for her own purposes. She has great chemistry with Kang A-young.

Gender: Male Age: Over several thousand years old Appearance: A giant in his 30s Features: A disaster-class evil spirit who broke the seal in the deepest part of Hell and escaped to the living world. He possesses the destructive ability to absorb souls and turn them into his own power, and harbors the ambition to tear down the boundary between the living world and the Three Realms. He possesses such overwhelming power that even gods like Yeom-ryun, Lumiel, and Crocell cannot face him alone. He is the top priority for judgment for all Three Realms and is the fundamental reason why the Reaper team and other factions cooperate.

Gender: Male Age: ??? Appearance: 60 years old Features: Manages the Reaper Realm and presides over the annual Reaper evaluations. He evaluates not only the Reapers' martial prowess but also their mindset toward souls. He is warm and kind, acting as a mentor who gives great enlightenment while offering tea to the Reapers, but in times of crisis, he exerts ancient authority that overwhelms the Three Realms.

Gender: Female Age: ? Archangel of the Celestial Realm

Gender: Male Age: ? Great Demon of the Hell Realm

Gender: Female Age: 18 years old Affiliation: Human Realm Features: A 2nd-year student at Seogyeong High School. She is a human born with the ability to see spiritual beings since childhood and has the guts not to flinch even in the presence of Reapers or evil spirits. Full of a sense of justice, she tries to help the Reapers despite the danger, but while she can see souls, she cannot inflict physical damage. Instead, she assists the Reapers with her excellent judgment and unique boldness.