Sea Fairy Cookie Costume
Bring the legendary, ocean-inspired Cookie Run character to life.
Sea Fairy Cookie is a powerful Legendary Cookie from the Cookie Run series, loved for her elegant, water-themed design and tragic lore. Her look is defined by flowing, wave-like robes, a glowing ice sword, and hair that mimics the ocean's depths. Wearing this costume allows you to embody one of the franchise's most beautiful and majestic characters.
- Difficulty
- Advanced
- Time
- ~180 min
- Budget
- $60–150
Try it on
See yourself as Sea Fairy Cookie
One clear photo of yourself; we render you in this costume — face untouched, full body, about 20 seconds.
One render, $1. No account needed — if it fails you're not charged. Pricing.
Your photo is sent to Google's Gemini API to make the render and isn't used for training. Renders are AI-generated and labelled.
Want a different costume on this photo, or a whole group in costume? Open the Try-On Studio.
What you need for a Sea Fairy Cookie costume
Short on time? Buy it ready-made
Spirit Halloween sells the complete Sea Fairy Cookie costume — one box instead of 5 pieces.
Gradient blue and white dress
A flowing, floor-length satin dress transitioning from deep ocean blue at the top to a white, seafoam-like ruffled hem.
DIY: Dye a white satin maxi dress using blue fabric dye to create an ombré effect from the bodice down.
Sheer water-like cape
A light blue, translucent organza or tulle cape attached at the shoulders to mimic flowing water.
DIY: Drape and pin two yards of sheer light blue organza fabric to the shoulders of the dress.
Coral and seashell crown
A delicate headpiece made of white coral branches, small seashells, and pearls.
DIY: Glue faux white coral branches and small plastic seashells onto a simple silver headband.
Wave-like blue wig
A long, voluminous wig in shades of light blue and teal with wavy styling that mimics ocean waves.
DIY: Style a long blue wig using hairspray and curling iron on low heat to create structured, wave-like curls.
Glowing ice sword
A prop sword made of translucent blue plastic or foam, resembling a blade carved from ice and water.
DIY: Cut a sword shape out of clear blue acrylic or EVA foam, paint the edges white, and wrap the hilt in white ribbon.
Rather not assemble it? See ready-made Sea Fairy Cookie costumes at Spirit Halloween ↗
How to put it together
- 1
Put on the long, wavy blue wig and secure it with a wig cap and bobby pins.
- 2
Carefully place the coral and seashell crown on top of the wig, pinning it in place if necessary.
- 3
Slip into the gradient blue and white dress, ensuring the ruffled hem flutters freely.
- 4
Attach the sheer light blue organza cape to the shoulders of the dress using safety pins or fabric snaps.
- 5
Apply the ocean-themed makeup, focusing on the blue face gem and shimmering highlights.
- 6
Carry the translucent blue ice sword prop to complete the legendary look.
Makeup & hair
Style the long blue wig with voluminous, wave-like curls framing the face. Apply shimmering silver eyeshadow, blue eyeliner, and place a small, teardrop-shaped blue gem or face sticker in the center of your forehead.
Sea Fairy Cookie for couples, groups, kids & more
- couples
- Pair up with Moonlight Cookie in her celestial gown for a legendary Cookie Run duo.
- group
- Gather friends to dress as other Legendary Cookies like Fire Spirit, Wind Archer, and Moonlight Cookie.
- kids
- Use a blue tutu dress, a mini shell tiara, and a soft foam sword for a comfortable kids' version.
- Plus size
- Opt for an empire-waist gradient maxi dress with a flowing chiffon overlay for a comfortable, elegant fit.
Tips
- Use lightweight materials for the sword prop so it is easy to carry around all day at a convention.
- Secure the crown with extra bobby pins to keep it from slipping off the smooth synthetic wig fibers.
- Wear comfortable white flats or sandals under the long dress, as they will be mostly hidden by the hem.
Sea Fairy Cookie costume FAQ
- How do I make Sea Fairy Cookie's sword?
- You can craft her sword using layers of blue EVA foam, sanding the edges to a point, and painting white highlights to look like ice. Adding blue fairy lights inside translucent plastic is a great way to make it glow.
- What is Sea Fairy Cookie's hair made of?
- In the game, her hair is literally made of flowing water. For a costume, this is best replicated using a high-quality, multi-toned blue and teal wig styled into thick, flowing waves.
- Can I buy an official Sea Fairy Cookie costume?
- While official costumes are rare, many cosplay commissioners make high-quality replicas, or you can easily assemble one using mermaid-themed dresses and accessories.
Did you know? Sea Fairy Cookie was originally created for the Cookie Run trading card game before making her grand, legendary debut in the main mobile games.