The Dual Voice Behind Jinu: Who Really Voices The K-Pop Demon Hunters Star?

The character Jinu from the Netflix animated musical film K-Pop Demon Hunters has quickly become a fan favorite, not just for his dashing looks as the leader of the villainous Saja Boys, but for his distinct and captivating voice. As of December 2025, the answer to "who voices Jinu" is a fascinating dual identity, a brilliant creative decision that combines the star power of a beloved K-drama actor with the vocal talent of a veteran K-pop producer. This unique casting choice ensures that Jinu’s speaking voice carries dramatic weight, while his singing voice delivers authentic, chart-topping K-pop quality.

The speaking voice of Jinu is provided by the internationally recognized South Korean-Canadian actor, Ahn Hyo-seop, marking his significant debut in the world of voice acting. Meanwhile, the powerful, smooth vocals for all of Jinu’s K-pop performance songs are delivered by the talented singer-songwriter and composer, Andrew Choi. This article dives deep into the profiles of both men who brought the complex, demon-idol character to life.

Ahn Hyo-seop: Biography and K-Drama Star Profile

Ahn Hyo-seop, who provides the speaking voice for Jinu, is one of South Korea's most sought-after actors, often referred to as a "K-drama prince." His transition into voice acting for an animated Netflix film was a major headline event for fans globally.

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• Full Name: Ahn Hyo-seop (Korean: 안효섭)
• English Name: Paul Ahn
• Nationality: South Korean and Canadian
• Born: April 17, 1995
• Birthplace: Seoul, South Korea
• Debut: 2015 (as a singer in the project group One O One)
• Agency: The Present Company
• Notable K-Drama Roles:
  • *Business Proposal* (2022) as Kang Tae-moo (GoFood CEO)
  • *Dr. Romantic* (Seasons 2 & 3) as Seo Woo-jin
  • *Lovers of the Red Sky* (2021) as Ha Ram
  • *A Time Called You* (2023) as Gu Yeon-jun / Nam Si-heon
• Voice Acting Debut: *K-Pop Demon Hunters* (2025) as Jinu

Ahn Hyo-seop’s casting brought immediate star power to the project. His ability to convey both charisma and underlying menace—essential traits for Jinu, the leader of the demon-idol group Saja Boys—was crucial to the character's success. Fans of his previous work, particularly his role as the charming but intense CEO Kang Tae-moo in *Business Proposal*, were thrilled to hear his voice in a new, animated context.

Andrew Choi: The Legendary K-Pop Songwriter Behind Jinu's Vocals

While Ahn Hyo-seop handles Jinu’s dialogue, the authentic, polished K-pop sound of the character is all thanks to Andrew Choi, the voice behind Jinu's singing. This distinction is vital, as Jinu is a fictional K-pop idol, and his musical performances needed to be flawless and convincing.

Andrew Choi is a highly respected figure in the South Korean music industry, known primarily as a singer-songwriter, composer, and music producer. His involvement ensures the music of the Saja Boys is top-tier K-pop quality.

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Choi’s impressive career includes:

• Birth Date: December 25, 1980
• Career Highlights:
  • A former contestant on the popular reality singing competition *K-Pop Star Season 2* (2012), where he finished in third place.
  • A prolific songwriter and composer who has written major songs for some of K-pop’s biggest groups.
  • Notable songwriting credits for SM Entertainment artists, including SHINee and EXO.
• Role in *K-Pop Demon Hunters*: Providing the official singing voice for Jinu, the leader of the Saja Boys.

The decision to use a professional singer like Andrew Choi for Jinu's musical numbers, separate from Ahn Hyo-seop's speaking role, is a common practice in animated musicals to achieve the highest vocal standard. Choi’s experience in crafting hits for real-life K-pop idols makes Jinu's performances—despite the character being a demon—sound incredibly genuine and catchy.

The Saja Boys and the Complex World of K-Pop Demon Hunters

Jinu is not just a solo character; he is the charismatic leader of the Saja Boys (사자 보이즈), the main rival group to the titular female demon-hunting idol group, Huntrix. The Saja Boys are a fictional five-member K-pop boy group who, unbeknownst to their human fans, are secretly powerful demons.

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The premise of *K-Pop Demon Hunters* centers on the clash between these two groups, blending the high-energy world of K-pop with supernatural action and musical numbers. The film, which premiered on Netflix in June 2025, quickly gained attention for its unique concept and star-studded voice cast.

The full lineup of the Saja Boys and their respective voice actors further solidifies the film’s topical authority and deep connections to the K-pop and K-drama worlds:

• Jinu: Spoken by Ahn Hyo-seop / Sung by Andrew Choi
• Other Saja Boys Members: The group also includes characters voiced by talents such as Sungwon Cho, Neckwav, Alan Lee, and former U-KISS member Kevin Woo.

This ensemble cast of actors and seasoned K-pop professionals was meticulously assembled to give the Saja Boys a believable and formidable presence. The complexity of Jinu’s character—a ruthless demon king's subordinate who must maintain the facade of a charming idol—is expertly portrayed through the seamless collaboration between Ahn Hyo-seop and Andrew Choi.

The Impact of Ahn Hyo-seop's Voice Acting Debut

Ahn Hyo-seop's decision to take on a voice acting role in *K-Pop Demon Hunters* was a significant move that broadened his career beyond live-action K-dramas. For fans, it offered a new way to experience his talent, proving his versatility as a performer.

The character of Jinu is a captivating antagonist—a demon who manipulates his human audience through his music and idol persona. Ahn Hyo-seop’s delivery provides the necessary layers of charm, darkness, and internal conflict, making Jinu one of the most memorable characters in the animated film. The success of the film has opened up new avenues for K-drama stars to cross over into the global animation market, further cementing the reach of Korean media.

In summary, the voice of Jinu in *K-Pop Demon Hunters* is a true collaboration: the recognizable, dramatic speaking voice of Ahn Hyo-seop perfectly complemented by the authentic, powerful singing voice of K-pop veteran Andrew Choi. This dual performance is a key element that makes the Saja Boys leader feel incredibly real, despite his demonic origins, and is a brilliant example of how the best of K-drama and K-pop talent can merge to create a global animated hit.