Last updated: August 30, 2026ยท By Seckin Peker

Halloween Costume Idea For Kids

Baby Saja From KPop Demon Hunters Halloween Costume

The youngest Saja Boy wins a hot sauce contest without flinching, then says the only real line he has in the whole movie.
Cutedemongreen hairK-POPNetflixMale
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Quick Answer: The Baby Saja Halloween costume is a pink argyle sweater over a teal shirt with purple pants, topped with a yellow beret.
  • Pink Diamond Argyle Pattern Sweater (essential)
  • Teal Green Button-Up Collared Shirt
  • Purple Slim Fit Pants
  • Pink and White Chunky Athletic Sneakers
  • Green Fluffy Cosplay Wig
  • Yellow Beret With Flower Detail (essential)

Baby Saja is the youngest member of the Saja Boys, the demon boy band sent after HUNTR/X. On stage he plays up a cute baby act that drops the second the cameras stop. The pink argyle sweater and yellow beret combo is what separates him from the other four members. The rest of his outfit could belong to any idol. He’s not a lead like Jinu, so recognition depends on the group being in costume together. The movie itself passed 500 million views and won Best Animated Feature at the Oscars and the Golden Globes (Wikipedia). The franchise carries that weight, not him personally.

Items Total6 Items
DifficultyEasy
VibeCute-Coded Demon Boy
Cost$160-$200

Baby Saja Halloween Costume Items

Baby Saja from KPop Demon Hunters Halloween costume infographic showing pink argyle sweater, teal button-up shirt, purple slim fit pants, pink and white chunky sneakers, green wig, and yellow beret

Baby Saja Costume Items

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Baby Saja Saja Boys KPop Demon Hunters Cute
  • 1 Pink Diamond Argyle Pattern Sweater (essential)This is the piece that reads as Baby Saja before anything else, a fuzzy pink crewneck covered in a diamond argyle pattern, based on his official design. Netflix’s own store sells a licensed version of this exact sweater (Netflix Shop), which tells you how specific this detail is. Skip the argyle pattern and it just becomes a plain pink sweater with no tie to the character.
    See on Amazon
  • 2 Teal Green Button-Up Collared ShirtWorn underneath the sweater so the teal collar and a strip of hem show through. Without it, the sweater looks like it is worn over bare skin instead of layered.
    See on Amazon
  • 3 Purple Slim Fit PantsFitted purple trousers that keep the color contrast against the pink and teal up top. A loose or baggy pair flattens that contrast.
    See on Amazon
  • 4 Pink and White Chunky Athletic SneakersThick-soled sneakers in pink and white. Check your closet before buying, plenty of chunky sneakers already lean this direction.
    See on Amazon
  • 5 Green Fluffy Cosplay WigA short, tousled green wig with full bangs. His hair on screen leans more blue-gray. No wig on the market matches that shade exactly, and this fluffy green style is the one most cosplayers land on for him.
    See on Amazon
  • 6 Yellow Beret With Flower Detail (essential)The mustard yellow beret is what marks him apart from the rest of the Saja Boys. None of the other members wear a hat. Product photos do not show it, but reviewers confirm it ships with a small flower glued to the front, matching the brief’s detail. Wear it tilted back, not centered, or it just reads as a plain beret.
    See on Amazon
Baby Saja from KPop Demon Hunters standing in a pink argyle sweater, purple pants, and yellow beret, reference for the Halloween costume

How to Style the Baby Saja Halloween Costume

The pink sweater and yellow beret next to each other are what people notice first, since that exact pairing doesn’t show up on anyone else in the group. A beret worn straight and centered loses the tilt that makes it read as his, and just becomes a regular hat. At a party, purple pants that bunch at the ankle break the line between pants and sneakers, and that’s the kind of detail people notice. The green wig also runs a shade brighter than his actual on-screen hair, so under warm lighting it can drift toward yellow-green instead of the planned shade.

During a televised hot sauce contest, Baby Saja outlasts every other Saja Boy without a flinch. He wins, and responds with a flat “Goo goo, ga ga.” That’s the character in one scene, an exaggerated baby act for the cameras with nothing underneath it once they stop rolling. Off stage he drops the cute voice completely and gets sarcastic, even a little smug about it.

No wig matches his hair exactly

Search results for a “Baby Saja wig” mostly turn up wigs in different shades of green, none of them his exact blue-gray. Pick the closest one you can find and stop there, the shade reads close enough under normal lighting and is not worth ordering three wigs to chase.

Say the line once, then stop

His one real spoken line in the whole movie is “Goo goo, ga ga,” delivered completely deadpan after winning a contest. Use it once when someone asks about the costume, bored and unbothered, and skip trying to build a longer bit around it.

Baby Saja Group Halloween Costume Ideas

Group Idea: The Full Saja Boys

Baby Saja, Jinu, Abby Saja, Mystery Saja & Romance Saja

Excellent group idea if you can actually get five people together, since this is the whole demon boy band from the movie. Jinu gets spotted first as the frontman, but skip Baby Saja and the lineup loses its brightest, pinkest member for no real reason.

Baby Saja Jinu Abby Saja Mystery Saja Romance Saja

Group Idea: Saja Boys vs HUNTR/X

Baby Saja, Rumi, Mira & Zoey

Might work, but only if people know why it’s uneven. The movie’s rivalry pits a five-member band against a three-member girl group, not one demon against three idols. A lone Saja Boy across from all of HUNTR/X can read as random unless someone explains the joke.

Baby Saja Rumi Mira Zoey
Baby Saja from KPop Demon Hunters mid-dance move in his pink argyle sweater and yellow beret, reference for the Halloween costume

Baby Saja Halloween Costume DIY Tips

Building the Look

A few of these pieces might already be sitting in a closet somewhere. The sweater and the beret are the two worth buying new for accuracy.

  • Argyle sweater: this exact pink and diamond combo is hard to thrift, buy this one.
  • Teal shirt: check your closet first, most button-ups in this color work fine underneath the sweater.
  • Purple pants: thrift stores carry purple trousers occasionally, otherwise buy this one.
  • Sneakers: chunky white and pink sneakers show up at thrift stores fairly often.
  • Wig: skip trying to chase an exact color match, the shade will always be a little off, buy the closest green one and move on.
  • Beret: buy this one, there is no substitute for the specific yellow, and it is cheap.

Playing Baby Saja at the Party

He has exactly one spoken line in the entire movie, so there is not much dialogue to overdo. The rest of what he “says” is rapped inside the group’s songs, not something to recite at a party.

  • Use the “Goo goo, ga ga” line once, flat and bored, right after someone asks about the costume, then drop it.
  • He plays cute for the cameras and turns sarcastic the second they stop, so a deadpan attitude fits him better than an actual baby act all night.
  • Skip attempting a rap verse out loud, it works in the movie because it is animated and produced, not because it is easy to pull off live.

Baby Saja Halloween Costume: FAQ

Start with the teal button-up shirt under the pink diamond argyle sweater, that combo is his signature look. Add purple slim fit pants and pink and white chunky sneakers. Finish with a short green wig and the yellow beret, worn tilted back rather than straight on your head.

It depends on who is looking. KPop Demon Hunters passed 500 million views and won Best Animated Feature at both the Oscars and the Golden Globes, so the movie itself is not going anywhere. Baby Saja himself is a background member, not a lead, so recognition depends on the rest of the Saja Boys being there too.

Just one. After winning a hot sauce contest on a variety show, he says, “Goo goo, ga ga.” Everything else credited to him is rap verses inside the group’s songs, not spoken dialogue, so there isn’t a real quote list to give beyond that single line.

Danny Chung voices Baby Saja, both his speaking line and his singing parts. Chung is a Korean-American rapper and songwriter who has co-written several of Blackpink’s biggest hits before taking on this role.

The human form is the idol look this costume covers, pink argyle sweater, yellow beret, playful styling. His demon form is a separate design with pale blue-tinted skin, glowing golden eyes, claws, and dark traditional robes. This guide is for the idol version only.

Not if you already have short, light hair you can style yourself. The linked wig runs green rather than his exact on-screen blue-gray. No wig on the market matches that shade precisely, but it’s the closest, most commonly used stand-in for this character.

It is a stage act, not who he actually is. He plays up an exaggerated cute, baby-like persona for cameras and fans. He drops it completely off stage, where he is sarcastic and a little detached.

What does Baby Saja say after winning the hot sauce contest?

What does Baby Saja wear that none of the other Saja Boys wear?

What color is Baby Saja’s beret?