Full Profile of Saja Boys from “KPop Demon Hunters”: Meet the Members, Names, and Voice Actors

You’ve seen the chaos they caused in “KPop Demon Hunters,” but who are the Saja Boys, really? We have compiled an extensive profile of all the names, members, as well as voice actors of the Saja Boys from “KPop Demon Hunters” so join us and get to know these demon idols with perfect visuals. Then, witness how Saja Boys becomes another fictional K-pop idol group that becomes a cultural force, born from myth, K-pop archetypes, and animation brilliance. This is your definitive guide to everything you need to know about the Saja Boys.

Saja Boys of “KPop Demon Hunters” Members Profile: Who Are They?

• Group Name: Saja Boys (사자 보이즈)
• Debut Date: June 20, 2025
• Members: Jinu, Abs, Romance, Mistery, Baby
• Group Type: Fictional K-pop Group
• Origin: Netflix “KPop Demon Hunters”
• Genres: Pop, K-pop
• Creator: Maggie Kang and Chris Appelhans
• Fandom Name: Pride

The Saja Boys (사자 보이즈) are a fictional five-member K-pop boy group created for the 2025 Netflix animated feature KPop Demon Hunters. Produced by Sony Pictures Animation and directed by Maggie Kang and Chris Appelhans, the film presents the Saja Boys as a globally beloved idol group hiding a sinister truth—they’re not just performers, but demons in disguise, draining energy and souls from their fandom in secret.

Their name, Saja, cleverly embodies a dual meaning:

• In Hangul: 사자 (saja) means lion—a symbol of pride, power, and dominance.
• In Hanja: it can refer to the jeoseung saja (저승사자), the traditional Korean grim reaper.

This linguistic wordplay captures exactly what the Saja Boys are: beautiful predators dressed in idol aesthetics, balancing between idol worship and mythological dread. Think of them as a spiritual remix of K-pop, Korean folklore, and the ultimate “villain group” fantasy.

Saja Boys’ fandom name, Pride, reflects the group’s lion-themed identity, as “Saja” (사자) means “lion” in Korean, while a group of lions is commonly referred to as a pride. The fandom name also ties into the Saja Boys’ charismatic and fierce persona in the film, where they are depicted as a rival boy band secretly composed of demons aiming to captivate fans.

The group is voiced by a powerhouse cast of Korean American and Asian American talents, with separate voice actors for both dialogue and singing, adding dimensionality and realism to their idol personas.

Saja Boys Members Profile: Names, Roles, and Voice Cast in “KPop Demon Hunters”

Now that you’ve get the gist of the K-pop group concept, let’s get to know all the members names of Saja Boys, along with their voice cast for “KPop Demon Hunters.”

Also, prepare yourself. Because Saja Boys hide completely different personas than what their members names read on the surface.

Jinu

• Position: Leader, Center
• Voice Actor: Ahn Hyo Seop (Korean Canadian actor: “A Business Proposal,” “Dr. Romantic,” “Omniscient Readers,” etc)
• Singing Voice: Andrew Choi (singer and composer under SM Entertainment)
• Design Inspiration: Cha Eun Woo, Nam Joo Hyuk, BTS Jungkook
• Role Archetype: Charismatic visual-leader with emotional distance

Jinu is the face you can’t look away from—and probably shouldn’t trust. Modeled after Korea’s most iconic male visuals, Jinu oozes quiet intensity. The animation team designed him to exude a stoic elegance—someone you’d think twice before approaching and then regret not running from sooner.

Ahn Hyo Seop’s voice acting adds restraint and command, grounding the character in the kind of slow-burning confidence that K-pop leaders often carry. Director Maggie Kang revealed that Jinu was directly inspired by actors with clean-cut visuals but ambiguous charm, and that ambiguity is what makes him irresistible.

Jinu doesn’t speak often in the film—but when he does, it feels like a threat and a serenade wrapped into one.

Abs (Abby)

• Nickname: Abby
• Position: Main Dancer / Power Visual
• Voice Actor: SungWon Cho (known for Blackberry)
• Singing Voice: NECKWAV (Korean indie R&B and soul artist).
• Design Inspiration: MONSTA X’s Shownu, BTS’s RM (physique), ATEEZ’s Hongjoong (energy)
• Role Archetype: Strong hyung with silent dominance

Abs—originally referred to as “Abby” during early development—is the group’s muscle-bound enforcer. He was designed with intentional bulk: the animation team enhanced his physique by approximately 20% beyond the standard body model used for other members. But despite his imposing silhouette, Abs rarely speaks, embodying the classic “quiet powerhouse” trope familiar to long-time K-pop fans.

When he moves, the stage bends to him. When he stands still, he dominates the frame. He’s the kind of idol you can’t ignore—intense, intimidating, and mesmerizing when he finally breaks into choreography.

Mystery

• Position: Sub-vocal / Visual Enigma
• Voice Actor: Alan Lee (known for “The Ghost” and “Molly McGee”).
• Singing Voice: Kevin Woo (U-KISS member and solo artist)
• Design Inspiration: Anime characters, faceless idols
• Role Archetype: The unreadable cipher

Mystery doesn’t show his face—and he doesn’t need to. Draped in long, violet hair that covers most of his expression, Mystery exists more as a concept than a character. According to director Kang, the idea behind Mystery came partly from anime archetypes and partly from practical animation limitations—but fans quickly made him their projection point.

He represents the unknowable—the one fans interpret in dozens of different ways. His aura is eerie but elegant, unsettling yet oddly gentle. Every group has a black hole member who feels both everywhere and nowhere. Mystery is that—but distilled to perfection.

Romance

• Position: Sub-vocal / Visual Heartthrob
• Voice Actor: Joel Kim Booster (known for “Fire Island,” also voices variety show hosts in the film).
• Singing Voice: SamUIL Lee (K-pop songwriter).
• Design Inspiration: TXT Yeonjun, BIGBANG G-Dragon, Cha Eun Woo (hair motifs)
• Role Archetype: The flirty bias trap

Romance is the one with a wink in his eye and fangs behind his lips. His heart-shaped bangs aren’t just style—they’re a threat disguised as affection. Designed to embody the flirty, fanservice-heavy role found in real K-pop lineups, Romance delivers lines that feel like love confessions until you remember he’s here to feed.

He’s the member who always lingers a little too long during eye contact scenes. The one who dances softer just to lure you closer. Joel Kim Booster’s delivery gives him a sly confidence—every word a tease, every smile a trap.

Baby

• Position: Maknae / Rapper
• Voice Actor: TBA 
• Singing Voice: Danny Chung (singer-songwriter affiliated with THEBLACKLABEL, known for work with BLACKPINK and Jeon Somi).
• Design Inspiration: Stray Kids Hyunjin, BTS Jungkook (Golden era)
• Role Archetype: Cute-on-surface, chaotic-underneath maknae

Don’t let the name fool you—Baby is far from innocent. As the youngest member, he balances youthful energy with unpredictable intensity. He’s the glitchy wildcard. The kind of maknae who doesn’t just misbehave—he breaks rules that haven’t been invented yet.

With rapid-fire lines and unsettling grins, Baby plays into the beloved Gen Z chaotic energy seen in newer groups. He’s magnetic, unsettling, and dangerously addictive—the member most likely to win over unsuspecting fans…and then leave them ruined.

Discography

The Saja Boys have two standout songs that anchor their in-world reputation—and both reveal just how dangerous their appeal is:

“Soda Pop”

Upbeat and sickly sweet, masking an aggressive undercurrent. Feels like a summer bop on the surface—but structurally, it builds tension that mirrors hypnotic control.

“Your Idol”

A haunting, seductive anthem that tells you everything: They don’t want to be loved. They want to own you. It’s the parasocial bond pushed into horror-core territory.

What Makes the Saja Boys Members So Impactful?

The Saja Boys are more than a villain group—they’re a meta-commentary on fandom itself. Built entirely around K-pop tropes and emotional manipulation, they let you indulge in dangerous attraction safely. They’re a mirror, a myth, and a manifestation of what happens when idol culture, fantasy, and folklore merge.

They feel emotionally real—because they’re built from everything real fans crave: tension, projection, mystery, and control. And that’s exactly why their impact isn’t fading anytime soon.

Don’t miss our deep-dive editorial: Too Hot to Hate: The Irresistible Allure of the Saja Boys in “KPop Demon Hunters” →

Saja Boys: The Ultimate Profile of K-pop Boy Group Villains

As K-pop continues evolving into transmedia territory, the Saja Boys prove one thing with certainty: storytelling is the new standard. 

They may be fictional, but their hold on fans is very real. And maybe that’s what makes them timeless—because in 2025, loving your bias doesn’t always mean choosing the hero. Sometimes, the villain is the one who feels like home.

So, now that you’ve gotten to know all the names of Saja Boys members, which one is your bias? Please let us know in the comments.

Join us on Kpoppost’s Instagram, Threads, Facebook, X, Telegram channel, WhatsApp Channel and Discord server for discussions. And follow Kpoppost’s Google News for more Korean entertainment news and updates.