KPop Demon Hunters Singers: Voices Behind Huntrix & Saja Boys

When Netflix dropped its most-watched film ever, the conversation wasn’t just about the plot — it was about who’s behind the voices. K-pop Demon Hunters assembled a trio of professional singers to voice its demon-slaying idol group HUNTR/X, and their credentials go far beyond voice work. EJAE, Audrey Nuna, and Rei Ami wrote and performed the soundtrack that topped the Billboard Hot 100 and earned four Grammy nominations including Song of the Year.

Lead Singers for Girl Group: EJAE, Audrey Nuna, Rei Ami · Demon King Voice Actor: Lee Byung-hun · Rival Boy Band: Saja Boys · Directors: Chris Appelhans, Maggie Kang

The film’s soundtrack generated four of the top five spots on the Billboard Global 200 chart — a feat achieved by only four other elite albums (three by Taylor Swift and one by Drake) since the chart’s debut in September 2020.

The table above captures the essential production and casting details that define K-pop Demon Hunters’ musical identity.

Who are the singing voices for KPop Demon Hunters?

Netflix’s K-pop Demon Hunters separates speaking and singing voices — a common animation technique that lets filmmakers cast actors for their vocal performance while bringing in professional singers for the musical numbers. The film’s fictional K-pop group HUNTR/X consists of three characters: Rumi, Mira, and Zoey.

Huntrix girl group singers

The Huntrix girl group singers are EJAE, Audrey Nuna, and Rei Ami. EJAE, born Kim Eun-jae, is a 33-year-old Korean-American singer and songwriter based in New York City. She provides the singing voice for Rumi in HUNTR/X.

Audrey Nuna is a New Jersey-born genre-bending rapper-singer who brings Mira’s performance voice to life. Rei Ami, born Sarah Yeeun Lee, is the alt-pop rap artist who provides Zoey’s singing voice.

The collaboration between speaking and singing voices creates a layered performance — actress Arden Cho handles Rumi’s dialogue while EJAE brings the character’s songs to life.

Key voice actors overview

The dual voice casting isn’t unique to Rumi, but the directors strategically chose performers who could deliver both acting and musical credibility. The film’s directors Chris Appelhans and Maggie Kang reportedly heard EJAE’s demos and immediately knew she was the right fit.

The pattern of pairing established voice actors with professional singers allowed each performer to specialize in their strength.

Who Are EJAE, Audrey Nuna, and Rei Ami?

All three singers come from distinct musical backgrounds that shaped their approach to the film.

Backgrounds and musical careers

EJAE spent several years working behind the scenes in K-pop, writing and producing for TWICE, Taeyeon, and Nmixx before her international breakthrough with K-pop Demon Hunters in 2025. She was originally hired as a songwriter for the film, later becoming Rumi’s singing voice after directors heard her demos.

Audrey Nuna rose through the indie and alt-R&B scene with bold singles and a distinct fashion sensibility before joining the project. Her genre-blending approach brought a unique texture to Mira’s vocals.

Rei Ami, working under the stage name Sarah Yeeun Lee, established herself as an alt-pop rapper before taking on Zoey’s voice.

Roles in KPop Demon Hunters

Beyond providing singing voices, the trio contributed significantly to the songwriting. EJAE co-wrote ‘Golden,’ ‘How It’s Done,’ and ‘Your Idol’ for the film. She co-wrote and recorded most of the demos before being asked to be the official singing voice for Rumi.

EJAE recorded in a Manhattan studio during the production process, eventually contributing to songs that earned platinum certification and chart-topping success.

EJAE, Audrey Nuna, and Rei Ami all come from a musical background, bringing genuine artistry to their animated characters — not just vocal performance but creative input that shaped the soundtrack.

The three singers each brought specialized skills that elevated the soundtrack beyond typical animation music.

Who voice Saja Boys?

The Saja Boys are the film’s rival demon boy band — musicians who are secretly demons in disguise. While the Huntrix singers are well-documented, the Saja Boys vocal credits remain less comprehensively covered in available sources.

Saja Boys members and their demon roles

In the film’s narrative, Saja Boys appear as a polished K-pop boy band competing against HUNTR/X. Their demon identities are revealed as the plot unfolds.

Singing voices for rival boy band

The film’s soundtrack features Saja Boys on the track ‘Your Idol,’ co-written by EJAE. However, specific singing voice credits for Saja Boys characters are less publicly documented than the Huntrix trio.

Who is Rumi’s singing voice?

Rumi’s singing voice is provided by EJAE, whose Instagram handle is @ejae_k. She handles all of Rumi’s musical performances while actress Arden Cho provides the speaking voice for the character.

Singer-songwriter EJAE

EJAE’s path to the role was unconventional. She was initially brought on as a songwriter for the film. After presenting her demos, director Maggie Kang reportedly decided these tracks were essential to the project’s identity — and that EJAE herself needed to perform them.

This dual role as songwriter and singing voice meant EJAE shaped Rumi’s sonic identity from the ground up rather than interpreting another composer’s vision.

Specific character contributions

EJAE performed Rumi’s vocals across multiple songs, including the film’s breakout hit ‘Golden.’ Her performance contributed to a track that topped the Billboard Hot 100, earned four Grammy nominations including Song of the Year, and went platinum.

EJAE’s dual involvement as songwriter and vocalist set a precedent for how the film’s music was developed.

Are the singers in KPop Demon Hunters actually singers?

Yes — EJAE, Audrey Nuna, and Rei Ami are professional singers with established careers, not voice actors attempting to sing.

Real singers vs voice actors

The distinction matters for understanding the film’s quality. These performers have track records outside animation: EJAE has songwriting credits with major K-pop acts, Audrey Nuna built a following in indie and alt-R&B, and Rei Ami established herself in alt-pop rap.

Voice actors in the film handle dialogue while singers deliver musical performances. This separation allows each performer to specialize.

Use of autotune questions

Whether the soundtrack uses pitch correction as a creative choice remains unclear from public sources. Modern pop productions commonly use subtle pitch correction, and the film’s K-pop context makes this particularly relevant given the genre’s production norms.

The ruthless Demon King Gwi-ma is voiced by Lee Byung-hun — a casting choice that brought cinematic star power to the film’s antagonist. Arden Cho joins EJAE to voice Rumi’s speaking and singing voices respectively.

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Frequently asked questions

For fans of K-pop production, the film’s success demonstrates how independent artists can drive mainstream entertainment. EJAE’s transition from behind-the-scenes songwriter to Grammy-nominated artist happened through a single project — and her next moves will determine whether this is a breakout moment or a career defining.