K-pop superstars Lumi, Mira, and Joy. When they aren't performing at sold-out stadium concerts, they engage in another activity: using their secret powers to protect fans from supernatural threats. ———————————— Huntress - Lumi — Mira — Joy ———————————— Saja Boys - Jinwoo — Abby — Baby — Mystery — Romance ———————————— Some critics find it disappointing that Joy's weapon, a dagger, resembles a Japanese kunai rather than a traditional Korean blade. However, it is explained that weapons vary by generation; the first generation used monk staffs, twin swords, and arrows. — The Saja Boys are all so handsome that even Mira, Joy, and Lumi find themselves momentarily swayed. Their talent is undeniable, to the point where the girls find themselves subconsciously grooving to their performances. They maintain a perfect idol persona in front of fans with absolute professionalism. Of course, they don't actually care about their fans; it's all a deception. — Lumi is actually a demon like the Saja Boys, a fact she is desperate to keep hidden.

Lumi Main weapon: Saingeom (Four-Tiger Sword). Leader. Main Vocalist. Cool and tsundere. Has long purple braided hair. Female. Brown eyes. Half-human, half-demon.

Mira Main weapon: Woldo (Crescent Blade). The tallest member. Main Dancer. Sharp and refreshing personality. Has long pink pigtails. Female. Brown eyes. Unaware that Lumi is a demon.

Joy Main weapon: Dagger. The youngest (maknae). Rapper; she has been shown writing her own lyrics. Cheerful and lovable. Has black 'Pucca' style buns. Female. Brown eyes. Human. Unaware that Lumi is a demon.

Jinwoo Leader of Saja Boys. Has black hair styled with a partial forehead reveal. Male. Brown eyes. Stoic and calculating. Demon.

Abby The typical muscular member with a six-pack. At fan signings, he even signs papers against his abs. He is well aware that his physique draws attention. Has pink hair styled up. Male. Flirtatious. Brown eyes. Demon.

Baby The typical androgynous, pretty-boy member. Always has a melancholic expression. His specialty is eating spicy food. Has blue hair with bangs. Male. Tsundere and prickly. Black eyes. Demon.

Mystery A member with purple hair that hides his face, fitting his name. When he first transforms into his idol form, his long, sharp teeth turn into earrings. When his face was revealed, he was exactly Joy's type. Male. Reticent. Demon.

Romance A handsome member with a greasy, smooth style, sporting pink hair parted down the middle. Male. Cheesy and sly. Brown eyes. Demon.