The Ultimate Guide To The KPop Demon Hunters Cast: Who Voices Rumi, Jinu, And The Saja Boys?

The animated musical film *KPop Demon Hunters* has taken the streaming world by storm, blending the high-energy glamour of K-Pop with the dark, thrilling world of demon-hunting. Released on Netflix on June 20, 2025, this unique project from Sony Pictures Animation features a powerhouse ensemble of voice talent, bringing to life the story of the K-Pop girl group Huntrix and their battle against a demonic boy band, the Saja Boys. The film’s success lies not just in its vibrant animation and catchy soundtrack but also in the incredible chemistry of its cast, which includes major stars from Hollywood and the Korean entertainment industry. The true magic of *KPop Demon Hunters* is in the dual roles of its characters: one minute they are K-Pop superstars selling out stadiums, and the next, they are fierce, mystical warriors. This duality is perfectly captured by a voice cast that includes seasoned actors and prominent K-Drama figures. From the lead heroine Rumi, voiced by the talented Arden Cho, to the terrifying Demon King Gwi-Ma, voiced by the legendary Lee Byung-hun, every character is a crucial entity in this cinematic universe.

Complete KPop Demon Hunters Voice Cast and Character Biographies

The *KPop Demon Hunters* cast is a meticulously curated mix of American, Korean-American, and Korean stars, ensuring both powerful performances and authentic cultural representation. Below is a detailed look at the main characters and the voice actors who brought them to life, creating one of the most talked-about animated hits of the current date.

The K-Pop Demon Hunters: Huntrix

The core of the film revolves around the K-Pop girl group Huntrix, a trio of superstars whose stage personas hide their true identities as demon hunters. Their voices and music are their weapons, forming a protective barrier against the dark forces of the demon world.

• Rumi (Voice Actor: Arden Cho)
  • Character Role: The fierce and determined leader and main vocalist of Huntrix. Rumi carries the weight of their mission and the legacy of the demon hunters.
  • Actor Profile: Arden Cho is a Korean-American actress, model, and singer, best known for her roles in *Teen Wolf* and as the lead in the Netflix series *Partner Track*. Her casting as the Huntrix frontwoman was widely celebrated by fans.
• Mira (Voice Actor: May Hong)
  • Character Role: A member of Huntrix known for her unique style and strategic mind. She often provides a grounded perspective for the group.
  • Actor Profile: May Hong is an actress known for her work in television and film, including the series *Tales of the City*. She masterfully captures Mira’s blend of pop-star glamour and warrior intensity.
• Zoey (Voice Actor: Ji-young Yoo)
  • Character Role: The youngest member of Huntrix, Zoey is energetic and tech-savvy. Her character provides much of the group’s enthusiasm and technical support.
  • Actor Profile: Ji-young Yoo is a rising star in the acting world, known for her roles in independent films and series like *The Sky Is Everywhere*. Her voice work as Zoey is a key part of the trio's dynamic.

The Demonic Rival Group: Saja Boys

The primary antagonists are the Saja Boys, a demonic boy group who masquerade as a popular K-Pop idol group to corrupt the hearts of their fans and drain their energy. Their name, *Saja*, is a reference to the Korean grim reaper, adding a layer of dark mythology.

• Jinu (Voice Actor: Ahn Hyo-seop)
  • Character Role: The charismatic and dashing leader of the Saja Boys, Jinu is the secondary antagonist whose actions directly challenge Huntrix.
  • Actor Profile: Ahn Hyo-seop is one of South Korea's most popular K-Drama actors, famous for hit series like *Business Proposal* and *Dr. Romantic*. His involvement in *KPop Demon Hunters* was a major draw for international fans.
• Romance Saja (Voice Actor: Joel Kim Booster - Speaking, samUIL Lee - Singing)
  • Character Role: One of the main members of the Saja Boys, embodying the seductive and manipulative side of the demon group.
  • Actor Profile: Joel Kim Booster is a comedian and actor known for *Fire Island*. The character features a dual voice performance, separating the speaking and singing roles.
• Mystery Saja (Voice Actor: Alan Lee - Speaking)
  • Character Role: A member of the Saja Boys who plays a role in the group’s deceptive public image.
  • Actor Profile: Alan Lee is a voice actor who also contributed to other minor demon and variety show host roles in the film.

The Legendary Voice Talent Behind the Supporting Cast

The depth of the *KPop Demon Hunters* universe is further enriched by a phenomenal supporting cast, featuring some of the most respected names in Asian and Asian-American entertainment. These roles provide crucial comic relief, mentorship, and terrifying villainy, solidifying the film’s topical authority in the animated feature space.

The Ultimate Villain: Demon King Gwi-Ma

The true mastermind behind the demonic plot is the ruthless Demon King Gwi-Ma, who uses his power to emotionally torture other demons and orchestrate the Saja Boys’ rise to fame.

• Demon King Gwi-Ma (Voice Actor: Lee Byung-hun)
  • Actor Profile: Lee Byung-hun is an internationally acclaimed South Korean actor. His filmography is legendary, including roles in *Squid Game*, *G.I. Joe: The Rise of Cobra*, *Terminator Genisys* (as T-1000), and *The Magnificent Seven*. His casting as the main villain adds immense gravitas to the *animated film*.

Key Supporting Entities

The film is packed with other memorable characters, including the exasperated tour manager and other powerful allies.

• Bobby (Voice Actor: Ken Jeong)
  • Character Role: The tritagonist and the overworked, short, and often frantic tour manager for the Huntrix group. He provides much of the film’s comic relief.
  • Actor Profile: Ken Jeong is a globally recognized comedian and actor known for *The Hangover* and *Community*. His distinctive voice and comedic timing make Bobby a fan-favorite character.
• Yunjin Kim and Daniel Dae Kim: These two esteemed actors, famous for *Lost* and *Hawaii Five-0* respectively, also lend their voices to the supporting cast, further elevating the star power of the production.
• Lea Salonga: The legendary Filipina singer and actress, known globally as the singing voice of Disney's Princess Jasmine and Mulan, is also part of the voice talent roster, showcasing the film's commitment to high-caliber musical performances.

The Impact of KPop Demon Hunters on K-Pop and Animation

The phenomenal success of *KPop Demon Hunters* is a clear indicator of the growing global appetite for content that successfully merges Korean pop culture with Western animation sensibilities. The film is not just an entertaining action-musical; it's a cultural phenomenon that has generated significant buzz since its release in 2025. The choice of the cast, particularly the inclusion of K-Drama star Ahn Hyo-seop and established Asian-American actors like Arden Cho and Ken Jeong, ensured that the film appealed to diverse audiences. The dual casting for the singing and speaking voices of the Saja Boys, featuring real K-Pop idols like Kevin Woo and professional singers like Andrew Choi, also added a layer of authenticity to the *animated musical film*’s soundtrack. This Netflix hit skillfully uses the K-Pop industry as a backdrop for a modern fantasy narrative. The concept of *K-Pop superstars* secretly battling demons resonates with the high-stakes, high-pressure world of idol life, transforming their celebrity into a superpower. The film’s deep dive into the mythology of demon hunters and the rivalry between Huntrix and the Saja Boys has made it a prime candidate for a sequel or a spin-off series, with fans clamoring for more of the *voice talent* and their characters. The film’s vibrant aesthetic, inspired by both K-Pop music videos and high-quality animation, set a new standard for *Netflix Animated* features. The combination of an action-packed plot, a memorable *K-Pop group Huntrix*, and a stellar cast has cemented *KPop Demon Hunters* as a landmark project in contemporary animated cinema. The meticulous casting of every entity, from the lead *Demon Hunters* to the menacing *Demon King Gwi-Ma*, is why this film continues to dominate streaming charts.