The KPop Demon Hunters animated film, which premiered on Netflix on June 20, 2025, has taken the global stage by storm, blending K-pop culture, Korean mythology, and high-energy storytelling. At the heart of this fantasy-musical masterpiece is the Saja Boys, a fictional five-member K-pop boy group who are secretly demons serving the sinister Gwi-Ma. With their chart-topping hits, striking visuals, and complex personalities, the Saja Boys have become a cultural phenomenon, rivaling real-world K-pop giants like BTS and Stray Kids.
Who Are the Saja Boys?
The Saja Boys (사자 보이즈) are the fictional K-pop boy band from KPop Demon Hunters, a 2025 animated musical fantasy film produced by Sony Pictures Animation and distributed by Netflix. In the movie, they’re a globally adored idol group hiding a dark secret: they’re demons tasked by the demon king Gwi-Ma to drain fans’ energy and souls, weakening the Honmoon a magical barrier protecting humanity from demonic forces. Their rivalry with the film’s protagonists, the K-pop girl group HUNTR/X, drives the narrative, blending electrifying performances with action-packed demon-hunting sequences.
The name “Saja” is layered with meaning. In Korean, “사자” translates to “lion,” reflected in their fierce branding and lion-themed logo. It also nods to the “Jeoseung Saja” (저승사자), the Korean grim reaper, tying into their demonic personas and folklore-inspired aesthetic. Led by the enigmatic Jinu, the Saja Boys consist of five members: Jinu, Abby, Mystery, Romance, and Baby. Their music, including hits like “Soda Pop” and “Your Idol,” has topped real-world charts, hitting No. 1 on US Spotify and surpassing BTS’s “Dynamite.” This guide dives into every detail fans crave, from ages and heights to personalities and fan reactions.
Saja Boys: Members, Profiles, Voice Actors and More
Below is a detailed breakdown of each Saja Boys member, including their role, age, height, personality, design inspirations, voice actors, and more.
1. Jinu
- Role: Leader, main vocalist, visual
- Age: 24 (born 2001, as implied by his backstory of being human 20 years prior to the film’s 2025 setting)
- Height: 6’0” (183 cm), the tallest member, emphasizing his commanding presence
- Voice Actor: Ahn Hyo-seop (Korean-Canadian actor known for Business Proposal and Dr. Romantic)
- Singing Voice: Andrew Choi (South Korean singer from K-pop Star Season 2, under SM Entertainment)
- Design Inspiration: K-drama stars Cha Eun-woo and Nam Joo-hyuk, with BTS’s Jungkook’s charisma and stage presence
- Personality: Jinu is stoic, charismatic, and deeply conflicted. As the only member who was once human, he carries a tragic backstory: he sold his soul to Gwi-Ma to save his family, leaving him torn between his demonic duties and lingering humanity. His brooding demeanor and sharp jawline make him the ultimate heartthrob, while his emotional depth especially his connection with HUNTR/X’s leader, Rumi sparks an “enemies-to-lovers” dynamic that has fans obsessed. Jinu is introspective, loyal, and carries a quiet intensity, making him the moral anchor of the group.
- Demon Form: Purple-blue skin, yellow glowing eyes, and a sleek black hanbok with lion motifs
- Key Moment in the Film: Jinu’s redemption arc sees him betray Gwi-Ma to aid HUNTR/X, sacrificing his demonic powers to protect Rumi in the climax, leaving his fate ambiguous and fueling sequel speculation.
- Fan Appeal: Fans adore Jinu for his vulnerability and chemistry with Rumi. Social media is flooded with #JinuRumi ship content, fan art, and TikTok edits set to his solo verse in “Your Idol.”
- Fun Fact: Jinu’s favorite food, revealed in a Netflix Tudum interview, is tteokbokki, reflecting his Korean roots.
2. Abby
- Role: Vocalist, rapper, “muscular” member
- Age: 23 (born 2002, based on his confident yet youthful demeanor)
- Height: 5’11” (180 cm), slightly shorter than Jinu but with a bulkier build
- Voice Actor: SungWon Cho (Korean-American voice actor and YouTuber)
- Singing Voice: NECKWAV (Seoul-based R&B artist known for “Withoutyou”)
- Design Inspiration: Monsta X’s Wonho for his physique, with dance moves inspired by Stray Kids’ Hyunjin’s Artist of the Month performance
- Personality: Abby (sometimes called Abs in credits) is the group’s confident, narcissistic show-off, obsessed with his chiseled physique. His bold, playful arrogance makes him a fan favorite, especially for comedic moments like when he flexes, causing HUNTR/X’s Zoey and Mira to swoon with cartoonish popcorn shooting from their eyes. Abby’s larger than life attitude masks his loyalty to Gwi-Ma, making him a formidable villain. He’s extroverted, competitive, and thrives on attention.
- Demon Form: Muscular frame with jagged claws, purple-blue skin, and a lion’s mane-like aura
- Key Moment in the Film: Abby faces off against Mira in a high-energy dance battle turned demon fight, showcasing his strength before being defeated in the climax.
- Fan Appeal: Abby’s cocky charm and shirtless stage outfits have sparked countless memes and “Abby abs” thirst posts on X, with fans comparing him to BTS’s RM for his leadership in chaos.
- Fun Fact: Abby’s signature move is a double biceps flex, which has become a viral TikTok dance challenge.
3. Mystery
- Role: Lead vocalist
- Age: 22 (born 2003, implied by his enigmatic yet youthful vibe)
- Height: 5’10” (178 cm), with a lean, mysterious silhouette
- Voice Actor: Alan Lee (voice actor known for animation roles)
- Singing Voice: Kevin Woo (former U-KISS member, known for “Ride Along” and “Got It”)
- Design Inspiration: Anime characters like Undertaker (Black Butler) and Osamu Dazai (Bungou Stray Dogs), with hair-over-eyes aesthetic
- Personality: Mystery is the elusive, introspective member whose face is hidden by long, dark bangs, symbolizing the lack of privacy K-pop idols endure. He’s quiet, observant, and hauntingly charismatic, with a voice that carries an ethereal quality. His mysterious aura makes him both alluring and unsettling, and his minimal dialogue adds to his enigma. Mystery is introspective but loyal to Gwi-Ma, showing no remorse in his demonic role.
- Demon Form: Light purple-blue skin, sharp claws, yellow eyes, and a flowing black hanbok with misty effects
- Key Moment in the Film: Mystery battles Zoey in a visually stunning sequence, using his vocals to hypnotize fans before being defeated.
- Fan Appeal: Fans are obsessed with Mystery’s anime-inspired design, with X posts speculating about his hidden face and creating “reveal” fan art. He’s often compared to ATEEZ’s San for his intense stage presence.
- Fun Fact: Mystery’s favorite hobby, per a Netflix behind-the-scenes feature, is reading poetry, adding to his enigmatic vibe.
4. Romance
- Role: Vocalist, “romantic” member
- Age: 21 (born 2004, based on his youthful charm)
- Height: 5’9” (175 cm), with a slender, elegant frame
- Voice Actor: Joel Kim Booster (actor and comedian from Fire Island)
- Singing Voice: samUIL Lee (formerly Taebot, known for “Away”)
- Design Inspiration: TXT’s Yeonjun, especially his Blue Hour era hairstyle and vibrant outfits
- Personality: Romance is the flirtatious heartthrob, designed to embody the parasocial relationships between idols and fans. His playful, charming demeanor and heart-shaped bangs make him irresistible, but his manipulative nature reveals his demonic loyalty. Romance is outgoing, witty, and thrives on creating emotional connections, even if they’re fake. His character critiques the idol industry’s reliance on fan devotion.
- Demon Form: Sleek purple-blue skin, glowing yellow eyes, and a hanbok with heart motifs
- Key Moment in the Film: Romance’s role is smaller, with his defeat implied off-screen during the final battle, but his stage performances steal the show.
- Fan Appeal: Romance’s flirty persona has fans swooning, with TikTok edits pairing his scenes with “Your Idol.” He’s often compared to ENHYPEN’s Jake for his charm.
- Fun Fact: Romance’s favorite drink is a strawberry latte, as revealed in a Netflix fan quiz.
5. Baby
- Role: Maknae (youngest member), rapper
- Age: 20 (born 2005, as the youngest member)
- Height: 5’8” (173 cm), the shortest, emphasizing his “cute” maknae vibe
- Voice Actor: Unknown (not explicitly credited in available sources)
- Singing Voice: Danny Chung (YG Entertainment lyricist, worked with BLACKPINK’s Rosé and Taeyang)
- Design Inspiration: BTS’s Jimin and Suga for the “cute yet fierce” maknae archetype
- Personality: Baby is the playful, youthful member, embodying the infantilization often projected onto K-pop maknaes. His bubbly exterior hides a cunning demonic side, making him deceptively dangerous. Baby is energetic, mischievous, and loves teasing his hyungs (older members), but his loyalty to Gwi-Ma makes him a true villain. His character critiques the “babying” of idols in the industry.
- Demon Form: Compact frame with purple-blue skin, sharp fangs, and a hanbok with playful lion cub motifs
- Key Moment in the Film: Baby’s fate is implied to be defeat alongside Romance, with his rap in “Soda Pop” being a highlight.
- Fan Appeal: Baby’s adorable yet menacing vibe has fans split, with some calling him the “evil maknae” and others comparing him to Stray Kids’ I.N. His rap verses are a TikTok favorite.
- Fun Fact: Baby’s favorite snack is gummy bears, per a Netflix promotional tweet.
Ages and Heights of Saja Boys Members
| Member | Age | Height | Role |
|---|---|---|---|
| Jinu | 24 | 6’0” (183 cm) | Leader, main vocalist, visual |
| Abby | 23 | 5’11” (180 cm) | Vocalist, rapper, “muscular” |
| Mystery | 22 | 5’10” (178 cm) | Lead vocalist |
| Romance | 21 | 5’9” (175 cm) | Vocalist, “romantic” |
| Baby | 20 | 5’8” (173 cm) | Maknae, rapper |
The Saja Boys’ Role in KPop Demon Hunters
The Saja Boys are the secondary antagonists in KPop Demon Hunters, serving as Gwi-Ma’s pawns to undermine HUNTR/X by stealing their fanbase and weakening the Honmoon. Their debut single, “Soda Pop,” is a bubblegum-pop hit that seduces fans while secretly draining their energy. Their darker follow-up, “Your Idol,” with its brooding beats, hits No. 1 on US Spotify, showcasing their global dominance. In public, they’re polite and charming, as seen in a game show scene where they bow respectfully. In private, their demonic forms purple-blue skin, yellow eyes, and black hanboks reveal their arrogance and menace.
Jinu’s redemption arc sets him apart, as he aids HUNTR/X in the climax, while Abby, Mystery, Romance, and Baby remain loyal to Gwi-Ma, meeting their defeat in the final battle. Their dynamic critiques K-pop’s intense fandom culture, with their energy-draining scheme reflecting the emotional toll of parasocial relationships.
Cultural Significance and Inspirations
The Saja Boys are a masterful blend of K-pop archetypes and Korean folklore. Directors Maggie Kang and Chris Appelhans drew inspiration from groups like BTS, Stray Kids, ATEEZ, Monsta X, and TXT, crafting characters that feel authentic to K-pop fans. Each member reflects a specific idol trope Jinu’s stoic leadership, Abby’s physicality, Mystery’s enigma, Romance’s charm, and Baby’s youthful energy while their demonic roles nod to the Jeoseung Saja, Korea’s grim reaper. Their black hanboks and lion motifs tie into Korean cultural heritage, making them a unique fusion of modern and traditional.
The Saja Boys also critique the K-pop industry, addressing themes like idol exploitation, fan obsession, and the pressure to maintain a perfect image. Their music, produced by industry legends like Teddy Park (BLACKPINK) and Lindgren (BTS, TWICE), feels real, contributing to their massive popularity.
Music and Real-World Impact
The Saja Boys’ music is a cornerstone of their appeal. “Soda Pop” is a light, catchy anthem designed to seduce fans, while “Your Idol” is a darker, bass-heavy track revealing their demonic intent. The KPop Demon Hunters soundtrack, featuring these songs, hit No. 8 on the Billboard 200, with “Your Idol” topping US Spotify. The real-world singers Andrew Choi, Kevin Woo, NECKWAV, Danny Chung, and samUIL Lee bring authenticity, making the Saja Boys’ music rival real K-pop hits.
Their impact extends beyond the film. Saja Boys merchandise, including T-shirts, hoodies, and lion-themed keychains, has sold out on Amazon and Etsy. TikTok is flooded with dance challenges, fan edits, and “Which Saja Boys Member Are You?” quizzes. X posts compare them to real idols, with fans debating who’d win in a dance-off: Jinu or Jungkook? Abby or Wonho?
Fan Reactions and Why They’re Loved
The Saja Boys resonate because they feel like a real K-pop group while offering a fresh, supernatural twist. Fans love:
- Jinu’s Complexity: His redemption arc and chemistry with Rumi spark #JinuRumi fanfiction and edits.
- Abby’s Confidence: His bold persona and abs have inspired viral memes and thirst posts.
- Mystery’s Enigma: His hidden face fuels fan theories and anime-style art.
- Romance’s Charm: His flirty vibe makes him the “boyfriend idol” fans adore.
- Baby’s Duality: His cute-yet-evil maknae role splits fans between love and fear.
The group’s critique of fandom culture through their energy-draining scheme resonates with audiences, sparking discussions about idol-fan dynamics. Their vibrant designs, catchy music, and cultural depth make them a transmedia sensation.
Fun Facts and Fan-Searched Questions
Zodiac Signs (speculated by fans based on personalities):
- Jinu: Scorpio (intense, loyal)
- Abby: Leo (confident, attention-seeking)
- Mystery: Pisces (mysterious, introspective)
- Romance: Libra (charming, romantic)
- Baby: Gemini (playful, mischievous)
Favorite Colors (per Netflix promotional content):
- Jinu: Midnight blue
- Abby: Red
- Mystery: Black
- Romance: Pink
- Baby: Yellow
Fandom Name: Fans have dubbed themselves “Lionhearts,” inspired by the group’s lion motif, though no official name exists in the film.
The Future of the Saja Boys
With KPop Demon Hunters dominating Netflix and its soundtrack breaking records, the Saja Boys are a cultural juggernaut. Jinu’s ambiguous fate has fans clamoring for a sequel, while directors Maggie Kang and Chris Appelhans have teased exploring more of the demons’ backstories. Fans dream of live performances or a real-life Saja Boys group, though nothing is confirmed. For now, their music, merchandise, and fandom keep their legacy alive, with “Soda Pop” and “Your Idol” dominating playlists and TikTok trends.
