Culture Compass

Who Sings for the Saja Boys? Members and Voices Explained

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Checked October 24, 2026. Original editorial guide, with source links below.

The Saja Boys’ songs in KPop Demon Hunters are sung by five performers: Andrew Choi, Neckwav, Danny Chung, Kevin Woo and samUIL Lee. Netflix’s soundtrack guide credits all five on both “Soda Pop” and “Your Idol”.

The band’s five fictional members are Jinu, Abby, Romance, Mystery and Baby. Four of them have one person for the English speaking voice and another for the singing voice, which is why “who voices” and “who sings” searches turn up different names. Baby is the exception, with one performer named in both roles.

A vocal booth seen through studio glass: a condenser microphone with pop filter and headphones, a mixing desk in front.
AI-generated editorial concept; not an actual production photograph.

Members, English voices and singers

MemberEnglish dialogueSinging voice
JinuAhn Hyo-seopAndrew Choi
AbbySungWon ChoNeckwav
RomanceJoel Kim BoostersamUIL Lee
MysteryAlan LeeKevin Woo
BabyDanny ChungDanny Chung; soundtrack credit

Each row follows that character’s official Netflix profile: Jinu, Abby, Romance, Mystery and Baby. Speaking credits are for the original English-language version; dubbed versions have their own voice casts.

Member → singing performer. JINU: Andrew Choi; ABBY: Neckwav; ROMANCE: samUIL Lee; MYSTERY: Kevin Woo; BABY: Danny Chung.
Original Culture Compass explanatory graphic; sources and details in the article.

Match the credit to the question

When someone asks who “plays” a Saja Boy, they might mean:

  1. The fictional member: an animated character in a demon boy band.
  2. The English speaking voice: the actor performing dialogue in the original version.
  3. The singing voice: the singer heard on the songs.
  4. A dubbed voice: a different cast for another language, not covered here.

Mixing these up is how one character ends up with “conflicting” names online. The credits don’t conflict; they describe different jobs.

Jinu: Ahn Hyo-seop speaks, Andrew Choi sings

Netflix’s profile names Ahn Hyo-seop as Jinu’s English voice and Andrew Choi as his singing voice. If you came here after hearing “Free”, Netflix’s soundtrack guide credits that duet to EJAE and Andrew Choi, not to Ahn Hyo-seop. The Jinu profile carries Netflix’s own warning for major plot details; we’ve left those out.

An extreme close-up of a condenser microphone's mesh grille and brushed metal body.
AI-generated editorial concept; not an actual production photograph.

Abby: SungWon Cho speaks, Neckwav sings

Netflix calls Abby the band’s primary dancer. SungWon Cho provides his English voice and Neckwav his singing. A cast list and a soundtrack list can therefore give different names without either being wrong: they identify different contributions to the character.

A heavy acoustic door stands ajar on a warmly lit studio with a microphone, stool and guitars inside.
AI-generated editorial concept; not an actual production photograph.

Romance: Joel Kim Booster speaks, samUIL Lee sings

Netflix’s profile describes Romance as the band’s resident Casanova, voiced in English by Joel Kim Booster with samUIL Lee as the singing voice. The cast guide notes Booster voices Romance among several characters. Keep the performer’s spelling, samUIL Lee, when searching; music services sometimes normalise the capitals.

Headphones hang on the back of a wooden chair in a bright studio with guitars and a keyboard behind.
AI-generated editorial concept; not an actual production photograph.

Mystery: Alan Lee speaks, Kevin Woo sings

Mystery is a backup singer whose long bangs hide his face, a design choice Netflix’s profile links to his mysterious image. Alan Lee voices him in English and Kevin Woo sings. “Backup singer” describes his role in the story; it doesn’t tell you how every harmony in a group recording is divided.

Close-up of recording-console faders and amber VU meters in a warm wood-panelled studio.
AI-generated editorial concept; not an actual production photograph.

Baby: why Danny Chung is in both columns

Netflix’s Baby profile names Danny Chung as his English voice. The same profile lists Baby’s solo rap on “Soda Pop” among the character’s iconic scenes, and the soundtrack credits Danny Chung among the song’s five performers. Netflix’s soundtrack guide also says Chung voices Baby. Together those credits place Danny Chung on Baby’s dialogue and on his music.

Some quick-reference tables assume every member must have two different people and invent a second name for Baby, or give him a different speaking voice. We’ve followed Netflix’s own profile and soundtrack credits. Credits don’t have to be symmetrical.

A studio screen showing two stacked blue audio waveform lanes between two monitor speakers.
AI-generated editorial concept; not an actual production photograph.

Who made Soda Pop and Your Idol?

Both songs are performed by the same five singers listed above. The writing and production credits are different lists:

SongWritten byProduced by
Soda PopVince, KUSH, Danny Chung, 24, DOMINSUK24, DOMINSUK, Ian Eisendrath
Your IdolEJAE, Mark Sonnenblick, Vince, KUSH, 24, IDO24, IDO, Ian Eisendrath

Two details stand out. Danny Chung both sings on “Soda Pop” and co-wrote it. And EJAE, the singing voice of HUNTR/X’s Rumi, is a writer on “Your Idol”. A writer credit doesn’t make someone a Saja Boy voice, and the group credit doesn’t give a line-by-line breakdown of who sings each phrase beyond what Netflix states.

Pencil-marked sheet music without lyrics and a guitar capo on a piano lid, a guitar nearby in daylight.
AI-generated editorial concept; not an actual production photograph.

Are the Saja Boys a real band?

They’re a fictional group in an animated film, performed by real singers and actors. The performers have careers beyond these characters, and an appearance by one of them doesn’t turn the five characters into a real touring lineup. HUNTR/X works the same way; our HUNTR/X voice guide maps its three members to their speaking and singing voices.

An empty listening room at dusk: a low charcoal sofa facing two large floor-standing speakers, a small lamp lit.
AI-generated editorial concept; not an actual production photograph.

Checking a clip, cover or dub

First work out what you’re hearing: film dialogue, the original soundtrack, a dubbed version or a later cover. Then use the matching credit: the audio language’s cast list for a dub, the soundtrack credits for the original songs, and the uploader’s description for a cover.

A hand holds a phone showing a blue audio waveform beside wired earbuds and a cup of black coffee.
AI-generated editorial concept; not an actual production photograph.

About the film

KPop Demon Hunters premiered on Netflix on June 20, 2025. Maggie Kang and Chris Appelhans directed, and Sony Pictures Animation made it with Netflix, according to Netflix’s release guide, which identifies the film’s production and original release.

Quick answers

Who is the Saja Boys’ lead singer? Jinu: sung by Andrew Choi, voiced in English by Ahn Hyo-seop.

Who sings Mystery? Kevin Woo. Alan Lee is his English voice.

Does Ahn Hyo-seop sing Jinu’s songs? Netflix credits Andrew Choi as Jinu’s singing voice.

Who raps for Baby on Soda Pop? Netflix highlights Baby’s solo rap on “Soda Pop” and credits Danny Chung, Baby’s voice, among the song’s performers.

Research note: All credits come from Netflix’s official Tudum pages, checked on October 24, 2026, for the original English version. No lyrics are quoted and the film’s ending isn’t described.

Sources checked

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