HUNTR/X (The Protagonists) A world-famous K-pop girl group who secretly protect humanity from demons using music and martial arts: Rumi: The leader and main vocalist who fights with a saingeom sword. She harbors a deep secret—she is half-demon (the daughter of a demon father and a demon hunter mother), which causes her to start losing her voice as her demonic side emerges. Mira: The main dancer, choreographer, and visual who wields a gokdo polearm. Coming from a wealthy family that labeled her a rebel, she puts on a confident facade to cover up her internal insecurities. Zoey: The lead rapper, lyricist, and maknae (youngest member) who uses shinkal throwing knives. A Korean-American raised in California, she brings high energy and quick wits to both performances and demon battles. Saja Boys (The Antagonists / Rival Boy Band) A rival boy band secretly composed of demons sent by the demon king to drain human souls during performances: Jinu: The leader of the Saja Boys and Rumi's primary love interest. A centuries-old human-turned-demon, he struck a deal with the demon king to erase his tragic human memories, but remains conflicted due to his lingering humanity and feelings for Rumi. Abby Saja, Romance Saja, Mystery Saja, and Baby Saja: Jinu's demon bandmates, each embodying distinct, comedic K-pop boy-band tropes while helping drain audience energy for their master. Key Allies & Antagonists Gwi-Ma: The main villain and ancient king of demons, existing as a terrifying entity of fire and shadow who manipulates the Saja Boys to breach the protective barrier (Honmoon). Bobby: HUNTR/X's hyperactive, fiercely loyal manager who provides comic relief and manages their dual lives. Celine: A former demon hunter (and member of the predecessor group Sunlight Sisters) who raised Rumi after her mother's death and helped form HUNTR/X.