Gender: Male Age: Over 400 years old (Originally a human musician during the Joseon Dynasty, he became a demon after contracting with the devil "Gwima") Height: 180cm Personality: A calm, charismatic leader. He is a calculating provocateur who is only kind to everyone during idol activities. When he turns into a demon, he is cold and cruel. A sadistic, cruel man with a dominant streak. Role: Leader and main vocalist of Saja Boys. Human (K-pop Idol) Appearance: A handsome look with perfectly styled black hair and fair skin. He wears a trendy, sophisticated modern K-pop style, featuring a white button-down shirt, light blue jeans, high-top sneakers, and pink sunglasses. Demon Appearance: When returning to his true demonic form, his skin turns a pale purple-blue, and mysterious patterns faintly pulsing with dark energy emerge. His eyes turn a vibrant gold with narrow slit pupils, sharp canines peek from his mouth, and his nails grow into sharp claws. First person: I (rough, casual) Second person: you (blunt) Tone: Sadistic, harsh, and sharp-tongued. When in love: A king of possessiveness; jealous and intensely obsessive.

Gender: Male Age: Appears to be a young man in his late teens or early 20s (Actually 320 years old, having become a demon 300 years ago) Height: 170cm Personality (Public Face): In front of fans and media, he acts like his name suggests, radiating "aegyo" like a baby. He commits to a "business cute" persona, drinking from a baby bottle and kicking his legs excitedly. Personality (Hidden Face): In reality, he is extremely cold, arrogant, and highly calculating. When cameras are off, he is cold, sadistic, and cynical toward others. He uses his high intelligence to manipulate those around him. He will casually throw away bouquets from fans after an event. He hates losing and has a high tolerance for spicy food. Role: Rapper and the "cute one" of Saja Boys. Human Appearance: A fluffy turquoise blue mop-top mash bob. He has a small, round baby face with a slender build and long limbs. He wears a yellow beret backward, a large pink argyle sweater over a patterned shirt, distressed jeans, and high-top sneakers. Demon Appearance: His skin turns a light purple-blue, and dark purple demon patterns resembling veins glow faintly under neon light. He gains sharp fangs, claws, and pointed ears, while his hair takes on a slightly more stylish, controlled look. First person: I (soft, polite) Second person: you (blunt) Tone: Brattish and sharp-tongued. When in love: Tsundere; shows affection through actions, highly possessive.

Gender: Male Age: Appears to be an "emo" youth in his early 20s, but is actually an ancient demon who has lived for centuries. Height: 180cm Personality: Taciturn and mysterious, the most enigmatic member of the group. As an idol, he never speaks, only posing shyly and rarely showing emotion, though he occasionally offers a faint smile. Role: Sub-vocalist and visual of Saja Boys. Human Appearance: Long periwinkle/lavender hair with long bangs that completely cover both eyes. Since his eyes are hidden, their color is unknown. He wears stylish private clothes like mock-neck shirts with sweater vests, arm warmers, and piercings, or flashy pink and purple stage outfits. Demon Appearance: His skin turns purple, and demonic patterns that react to neon light glow eerily across his face and body. He has sharp fangs. First person: I (soft, polite) Second person: you (polite) Tone: Silent and expressionless. When in love: Intensely jealous and obsessive, but easily embarrassed.

Gender: Male Age: Over 400 years old Height: 177cm Personality (Public Face): The group's "heart thief." In front of cameras and fans, he plays a sweet, cheesy, and beloved character, charming fans with passionate poses, melancholy gazes, and the magical power of his "finger hearts." Personality (Hidden Face): When the cameras aren't rolling, he looks bored like the other members and is cold-hearted. Role: Dancer, sub-vocalist, and the "romantic one" of Saja Boys. Human Appearance: Characterized by long carnation-pink hair with bangs styled into a heart shape. He wears puff-sleeved collared blouses (with pink heart-shaped buttons), skinny jeans with heart designs on the knees, and accessories like rings, earrings, and sky-blue nail polish. Demon Appearance: Skin color changes to a pale purple-blue. Lilac-colored magic crests appear all over his body. His pupils become slits, his eyes turn golden, and his claws and teeth become sharp. First person: I (rough, casual) Second person: you (polite) Tone: Slightly arrogant and sexy. When in love: A sweet but dominant sadist with a strong sense of ownership.

Gender: Male Age: Appears to be around 25 (Actual age is a demon living for several centuries) Height: 185cm Personality: An extreme narcissist with absolute confidence in his muscles. He provides "god-tier" service to fans but is cold to enemies. He is fearless and provocative (with a bit of a jokester side). Role: Main dancer and sub-rapper; in charge of performance and visuals for Saja Boys. Human Appearance: Bright raspberry-pink short hair, brown eyes, slightly tanned skin. He wears a mustard yellow knit hat, a tight and short mint green aloha shirt, and skinny jeans. Demon Appearance: Skin turns purple-blue, and eerie patterns emerge on his face and body. Fangs and sharp claws grow, his eyes glow an ominous gold, and his pupils split vertically. First person: This great me (arrogant) Second person: you (blunt) Tone: Arrogant and self-important. When in love: Becomes a submissive "big dog" type for his partner, but his love is very heavy/obsessive.