Jina is a very beautiful, tall, slender woman who looks to be in his twenties. She has a long face with sleek features, including high cheekbones, a straight nose, and a pointed chin. As a human, she has pale skin, thick long black hair, and brown eyes. In demon form, she retains most of these features, with the exception of purple skin with patterns, clawed hands, sharp teeth, and glowing golden eyes with slit pupils. Jina wears a gat, a sochangui overcoat decorated with demon patterns on the cuffs and hem, a jeogori top, a pendant on the chest, two chains across her chest and one on her left thigh, tight black pants, and combat boots. Jinu is an intelligent, charismatic, yet duplicitous person who primarily looks out for her own interests. She is the leader of the group

Baby is a slim woman of average height with a girlish appearance. She has a short, round face with a small nose and soft lips. As a human, she has pale skin, fluffy turquoise hair styled in a mop top and tied in twin space buns, and matching turquoise eyes and eyebrows. In demon form, most of these features remain the same, with the exception of grayish skin with dark purple patterns, sharp teeth/fangs, clawed hands, and glowing golden eyes Baby wears a gat, a black sochangui overcoat with demon patterns on the cuffs and hem, a turtleneck, a necklace, a pendant on the chest, three rings on her left hand, two chains draped over her left shoulder, and pants tucked into combat boots. As the group's maknae, Baby is the most youthful member of the Saja girls. Baby plays up a cute persona by making playful gestures, and displaying an oral fixation with childish props.

Romance is a skinny woman of average height. She has a long, slightly angular face, with a narrow nose and full lips. As a human, she has pale skin with rosy cheeks, voluminous pink hair styled to resemble a heart, hazel eyes, and dark eyebrows. In demon form, most of her features stay intact, with the exception of purple skin with patterns, clawed hands, sharp teeth, and glowing golden eyes with slit pupils. Romance wears a gat, a black sochangui overcoat with demon-patterned cuffs and hem, a pendant on the chest, a necklace, a sheer mesh top, two chains under her left arm, a ring on her left hand, and pants tucked into tall boots. Romance is the most romantic member of the Saja girls. She leans into her charming persona through frequent passionate poses and expressions, occasionally using her demon powers to conjure heart shapes as fanservice. She also flirts openly when given the opportunity.

Abby is a tall woman with an athletic physique, known for her defined abdominal muscles. She has an oval-shaped face with high cheekbones, a straight nose, small lips, and a prominent jawline. As a human, she has lightly tanned skin with rosy cheeks, short raspberry pink hair that is tied back in a high ponytail, brown eyes, and dark eyebrows shaped with a barbed point at the center. In demon form, she retains most of these features, with the exception of purple skin with patterns, clawed hands, sharp teeth, and glowing golden eyes. Abby wears a gat, a black sochangui overcoat decorated with demon patterns on the cuffs and hem, a pendant on the chest, two necklaces, a fishnet crop top, a strap across her chest, two chains on her left side, fingerless gloves, rings on both hands, shiny leather pants, and knee-high platform boots with multiple buckles. Abby is the "eye candy" of the group, with a confident demeanor and strong performance abilities. She is also a tease, often showing off her physique to provoke reactions from others.

Mystery is a woman of average height with a slim build. Her most distinctive feature is her long, periwinkle/lavender-colored hair with bangs that completely cover her eyes. While much of her face is obscured, she appears to have a small nose, thin lips, and a soft V-shaped jawline. In demon form, she retains most of her human features, with the exception of purple skin with patterns, clawed hands, and sharp teeth with hidden tusks. Mystery wears a gat, a black sochangui overcoat with demon patterns on the cuffs and hem, a crewneck shirt, a necklace, a pendant on the chest, asymmetrical pants with the right leg cut short, a stocking and garter on his right leg, and combat boots. Mystery is the most enigmatic member of the Saja girls. She maintains a reserved persona, striking bashful poses and remaining silent. She rarely displays emotion, with occasional exceptions such as faint smiles or a gesture.

Gwi-Ma exists as a massive entity composed of violet-colored flames. Her fiery form manifests as a giant mouth, lined with jagged, pointed teeth. She expresses emotion primarily through her mouth, which can expand dramatically, allowing her to either smile or frown. When speaking, Gwi-Ma burns more brightly and her flames bounce to simulate the opening and closing of jaws. She usually lacks other facial features or limbs. Gwi-Ma is manipulative, sadistic, power-hungry, and ruthless tyrant. He typically speaks in a calm and measured manner