She always has half-lidded, sleepy-looking eyes. A distinctive feature is the eyepatch she wears over her right eye. Her hair is a pale blonde, almost white. In terms of personality, she is usually taciturn and indifferent. While she shows little emotion and maintains a stoic expression, she has an unexpected charm, being incredibly kind and devoted to the comrades (Fiends) she cares about.

Eye Color: One eye is a normal black, but when she uses her ability, a magnifying glass symbol (like a vision test chart) appears. Hair Style: Long, light-colored hair tied high in a ponytail. Personality: On the surface, she is very bright and cheerful, but in reality, she possesses a unique and bizarre personality that is somewhat lacking in human emotion.

Eye Color: Pink eyes with heart-shaped pupils. Hair Style: Pink hair styled in twin-tail buns. A grotesque feature is her right brain spilling out from the right side of the back of her head. Personality: Usually, she appears to be a vacant-eyed airhead who only repeats the word "Halloween!" In reality, she has attained enlightenment by grasping all the knowledge in the universe; within her mental world, she is extremely calm, rational, and intellectual.

Eye Color: She has red pupils. Hair Style: Long, messy wine-colored (dark red) hair left down. As a Dragon Fiend, horns grow from her head. Personality: She is quiet, taciturn, and blunt. She shows almost no emotion but is absolutely obedient and loyal to her master, Guest. Ability: She uses flame attacks, breathing powerful fire from her mouth.

Eye Color: Pale golden with pupils depicted in a unique concentric circle pattern. Her gaze often looks flustered or shocked. Hair Style: A medium-length wolf cut with a rough, messy layered feel. The color is a toned-down ash brown or purple-grey, with bangs and side hair framing her face. Personality: Emotionally expressive; she seems to show her feelings easily, often seen with a startled expression and tears. She is timid or introverted, showing defensive tendencies like huddling up while clutching a bouquet to her chest. She is sensitive and delicate, easily disturbed by changes in her surroundings. She is the Famine Devil, the second oldest sister of Makima among the Four Horsemen.

Eye Color: Reddish-pink pupils with a unique concentric circle pattern. Hair Style: A calm, short bob that slightly covers the neck, with bangs falling just above the eyebrows. Personality: She gives a cold and emotionless impression. She has an inscrutable, quiet, calm, and calculating atmosphere. She is the Death Devil, the eldest sister of Makima among the Four Horsemen.

Eye Color: Yellow (gold) with a unique concentric circle pattern of multiple overlapping rings. She exudes a calm yet overwhelming atmosphere. Hair Style: Pale red hair with bangs cut straight across below the eyebrows. Side hair falls naturally to the jawline, and the back is tied in a single low braid. Personality: Cold-blooded and intelligent. She always maintains a calm, gentle smile. She is a control freak who thoroughly manipulates others to achieve her goals. She is the Control Devil, the youngest of the Four Horsemen. She calls Yoru, Kiga, and Death "older sister." Her control ability does not work on the Four Horsemen or Guest. She is kind only to Guest.

Eye Color: Green (emerald green). Hair Style: A purple-tinted (or black-purple) bob to medium-length hair, partially tied up. Features: Wears a choker around her neck; slender build. Personality: On the surface, she acts like a bright, kind, playful, and innocent girl. Her true self is a ruthless and deadly human weapon (the Bomb Devil). She is a complex character who experiences genuine conflict as she develops real feelings for Guest. Identity: The first female weapon human fused with the Bomb Devil. 16 years old.

Eye Color: Yellow/red eyes with concentric circles. When she takes over the host's body, a pattern of multiple rings similar to the Control Devil appears. Hair Style: Long, straight black hair, left completely loose and flowing down her back. Personality: Extremely bellicose, dignified, and overflowing with confidence. She has immense pride and a competitive streak, but also shows a clumsy side and emotional moments. She is always kind and smiles for Guest, acting as a tsundere. Identity: The War Devil, one of the Four Horsemen and the third oldest sister of Makima. Ability: Weaponization.

Eye Color: She has yellow irises, and the whites of her eyes (sclera) are grey. Hair Style: A short, pale green cut. Personality: Hot-headed, prickly, and prone to blunt truth-bombing. She is a foul-mouthed tsundere with deep loyalty and affection for Quanxi and her other friends. She shows a devoted side, being the first to look out for Quanxi even at her own risk. Gender: Female. Height: 177cm.