Ganyu Cosplay Execution Guide: Translucent Horns and Gradient Wig
Visual Analysis — Ganyu's Design Priorities
Before buying any materials, open the Genshin Impact model viewer or official screenshots and study Ganyu from multiple angles. The character has two elements that serve as immediate visual anchors: the horns and the long hair with colored streaks. The rest of the outfit — bodysuit, lace details, geo archon motif — matters, but if the horns look opaque or the wig doesn't have the correct gradient, the Ganyu cosplay loses instant recognition from ten meters away.
Ganyu's horns are curved, 向后, and feature a semi-translucent blue-violet hue with an inner glow. In the official artwork, they look like they are made of crystal or vitrified ceramics. This means painting them with opaque paint over EVA foam is unconvincing. The reader who comes to this guide wants exactly this: horns that let light pass through, not just a superficial shine.
Ganyu's hair is long, predominantly dark blue at the roots, transitioning to light blue and then silver-white at the tips. The front streaks are lighter than the back. This gradient is not uniform — it is more intense at the tips and in a few strategic streaks. Recreating this requires a well-thought-out Ganyu gradient wig, not just an off-the-shelf blue wig. Proper visual planning determines whether you will dye an entire base or work with extra wefts of different colors.
Finally, consider the proportion. Ganyu's horns are proportional to her head — not excessively large. In cosplay, cosplayers tend to make them too big. Measure against the reference: each horn is approximately the length of the character's hand (about 12–15 cm for an average-sized adult). Maintain this proportion or the look will become cartoonish.
Materials and Tools
Below is the complete list. Items marked with (mandatory) are essential; the others are optional but recommended for a premium result.
For the cosplay translucent horns
| Item | Mandatory? | Notes |
|------|-------------|-------|
| Polymer clay (2 blocks, e.g., Sculpey Original) | Yes | To sculpt the prototype/master |
| Molding silicone (1 kg, e.g., Silitek or Mold Star 15) | Yes | To create the negative mold |
| Clear epoxy resin (500ml kit, e.g., ResinPro or Epoxacril) | Yes | Main body of the horn |
| Translucent resin dye (blue + violet, e.g., Mixol or Tinta Gem) | Yes | Internal coloring |
| Pearl/pearlescent white paint (e.g., Pearl Ex White) | Optional | "Inner glow" effect at the base |
| Spray gloss varnish (e.g., Rust-Oleum Clear Gloss) | Yes | Protective layer and final shine |
| Aluminum wire or galvanized wire (2 mm) | Optional | Internal reinforcement if horns are > 12 cm |
| PPE: nitrile gloves, P100 mask, safety glasses | Yes | Epoxy resin is toxic without protection |
| Modeling tools, 220/400/600 sandpaper | Yes | Prototype finishing and post-curing |
To style the Ganyu cosplay wig
| Item | Mandatory? | Notes |
|------|-------------|-------|
| Dark blue/blue-black long base wig | Yes | Preference: heat-resistant fiber (e.g., Arda Wigs Ferrari or L-email Wigs) |
| Extra wefts (2 packs: 1 silver-white, 1 light blue) | Yes | For frontal and lateral gradient streaks |
| Synthetic fiber dye (iDye Poly or diluted acrylic dye) | Optional | If you prefer to dye the entire base |
| Alcohol markers (set: Copic B000, B02, BV000, BV04) | Optional | For localized gradient touches |
| Flat iron (low temperature, 120–140°C) | Yes | To seal wefts and shape |
| Thermal spray / Got2b Glued | Yes | Streak fixation |
| Weft glue (hot glue + fabric or Aleene's) | Yes | Fixing wefts to the base wig |
| Fine-tooth steel comb + vented brush | Yes | Detangling and positioning fibers |
| Cutting shears for synthetic fiber | Yes | Weft cutting and finishing |
Horn fasteners
| Item | Mandatory? | Notes |
|------|-------------|-------|
| Large hair clips (alligator clips) | Yes | Main fixation to the wig/head |
| Adhesive Velcro (2 cm width) | Optional | Alternative or reinforcement |
| Black flat elastic (1 cm width) | Optional | For adjustment under the wig |
| Araldite or fast-curing epoxy glue | Yes | Gluing clips to the base of the horn |
Estimated Budget
| Item | Price range | Source |
| --- | --- | --- |
| Resina epóxi transparente (kit 500ml) | $12.00 - $24.00 | Estimated FX |
| Silicone para moldagem (1 kg) | $11.00 - $20.00 | Estimated FX |
| Argila polimérica para protótipo (2 blocos) | $5.00 - $10.00 | Estimated FX |
| Corante translúcido para resina (azul e violeta) | $4.00 - $9.00 | Estimated FX |
| Verniz brilhante e tinta pearl (inner glow) | $5.00 - $11.00 | Estimated FX |
| Peruca base longa azul-claro / branca | $16.00 - $40.00 | Estimated FX |
| Tinta para fibra sintética (iDye Poly ou similar) | $6.00 - $12.00 | Estimated FX |
| Marcadores a álcool para toque degradê (set) | $7.00 - $16.00 | Estimated FX |
| Wefts extras (2 pacotes) | $6.00 - $14.00 | Estimated FX |
| Spray térmico e cola para wefts | $6.00 - $12.00 | Estimated FX |
| Material de fixação (presilhas, velcro, elástico) | $3.00 - $7.00 | Estimated FX |
| EPIs (luvas, máscara com filtro) | $5.00 - $11.00 | Estimated FX |
Estimated conversion based on a reference FX rate; local retail prices may differ.
Common Mistakes and How to Avoid Them
1. Opaque horns instead of translucent. The most frequent mistake. Cosplayers paint EVA horns with blue acrylic paint and then apply varnish. The result looks like painted plastic, not crystalline. Solution: use clear cosplay resin with a specific translucent dye for resin. The dye needs to be translucent, not an opaque pigment. If you want a more pronounced inner glow effect, add a small amount of pearl paint to the base of the horn before pouring the resin — this creates an "inner glow" that mimics the official artwork.
2. Trapped air bubbles in the resin. The second most common mistake and the most frustrating, because you only discover it after curing. Mixing resin vigorously introduces air. Solution: mix slowly for 3–5 minutes, scraping the sides and bottom. Let the mixture rest for 10 minutes before pouring. Pour slowly in a continuous stream into the mold. If possible, use a vacuum chamber or, at the very least, tap the mold lightly against the table to bring the bubbles up. An accessible technique: after pouring, quickly pass a torch (like a kitchen torch) over the surface at a distance of 15 cm — the heat pops the surface bubbles. Be careful not to melt the silicone.
3. Irregular or striped gradient on the wig. Cosplayers try to do an ombré with hair spray paint and end up with blotches. Solution: for a gradual and controlled gradient, use alcohol-based markers (like Copic) on dry wefts, working from top to bottom in light layers. Start with the lightest color on the tips and overlap layers of the darker color towards the root. Each layer should be light — it is easier to darken than to lighten. Alternate with air drying for 15 minutes between layers. If you are dyeing the entire wig with iDye Poly, follow the manufacturer's instructions for dilution and time — usually water at 80°C with the dissolved dye, dipping only the part that will receive the darkest color for 5–10 minutes, then gradually moving it upwards.
Step by Step — Sculpting and Casting the Translucent Horns
1. Sculpt the clay prototype
Warm the polymer clay in your hands until it becomes malleable. Using a front and side reference of Ganyu, sculpt a horn in a backward-curving shape. Start with a base cone and refine the curvature. The thickness should be relatively uniform — between 1.5 cm and 2 cm at the thickest point, tapering to 0.5 cm at the tip. Use a sculpting tool to mark soft texture lines (subtle veins, like deer antlers). The texture should not be deep; it is just to give visual interest when light passes through. The tip of the horn should be slightly rounded, never perfectly sharp — this prevents weak points in the resin and improves translucency at the end.
Checkpoint: Place the prototype against the side of your head (or a mannequin head). The horn should start at the temple, curve backward and upward, and end approximately at the height of the top of the ear. If it looks disproportionate, adjust it now.
2. Create the silicone mold
With the prototype finished, cure the clay according to the manufacturer's instructions (usually 130°C for 15 minutes for Sculpey Original). Let it cool completely. Build a containment box out of cardboard or acrylic — it should have at least 1.5 cm of clearance around the prototype on all sides. Fix the prototype to the bottom of the box with soft clay or temporary glue. Mix the silicone according to the indicated proportions (usually 1:1 for platinum-cure silicones). Pour slowly into one corner of the box, letting the silicone rise and cover the prototype naturally. This minimizes bubbles. The silicone should cover at least 1 cm above the highest point of the prototype. Curing time: 4–6 hours for fast silicones, up to 24 hours for conventional silicones.
Checkpoint: After curing, the mold should be firm to the touch but still flexible. Demold carefully and inspect — the internal cavity should be smooth and free of tears. Any imperfection in the mold will be replicated in all copies.
3. Cast the resin with translucent dye
Prepare the work area with parchment paper or protective plastic. Put on nitrile gloves and a filter mask. Mix the clear epoxy resin in the manufacturer's exact ratio (typically 2 parts resin to 1 part hardener by volume, or 100:45 by weight — check your product's label). Mix slowly for 4 minutes. Add 2–3 drops of translucent blue dye and 1 drop of violet for every 50 ml of mixture. The color will look very light in the liquid — it will become more intense after curing. Mix for 1 more minute. If you want the inner glow effect at the base, paint a thin layer of diluted pearl paint on the bottom of the mold and let it dry before pouring the resin.
Pour the resin into the mold in a slow, continuous stream. Fill to the top. Let it cure for the manufacturer's minimum time (usually 24 hours for handling, 72 hours for a full cure). Do not try to demold before 24 hours.
Checkpoint: After 24 hours, the resin should be rigid to the touch and should not mark when pressed with a fingernail. Demold carefully. The horn should have a uniform blue-violet color and allow light to pass through (test with a cellphone flashlight). If there are visible bubbles on the surface, sand with 400 and then 600 grit sandpaper, and apply a thin layer of glossy varnish.
4. Finishing and attachment
Sand any flash or burrs with 220, then 400, then 600 grit sandpaper. Apply two thin coats of glossy spray varnish at a distance of 20 cm, with a 30-minute interval between coats. To attach the horns to your head, glue two large alligator clips to the base of each horn with epoxy glue (Araldite). Position the clips at an angle so that the horn is oriented correctly when attached to the hair/wig. Let the glue cure for 12 hours. Add adhesive velcro as optional reinforcement if the horns are heavy.
Checkpoint: Attach the horns to the wig (or to your hair, if you are not wearing a wig). Shake your head vigorously. The horns should not come loose or wobble visibly. If they move, add more attachment points.
Step by Step — Styling the Wig with Gradient Highlights
1. Prepare the base wig
Place the wig on the wig stand. If you bought a dark blue wig (the ideal scenario), you will need to lighten the ends and add highlights. If you bought a white wig, you will need to darken the roots. For the gradient most faithful to the design, start with a dark blue base and add the light ends. Comb the entire wig with a steel comb, removing any tangles. Identify the front highlights that will be lightened — on Ganyu, these are the face-framing strands and the ends of the long hair in the back. Tie the rest of the wig with hair elastics to isolate the working area.
Checkpoint: Before any dyeing, test the marker or dye on a hidden weft at the nape of the neck. Wait for it to dry and check if the color adhered and if the fiber didn't melt or become sticky. This prevents disastrous surprises.
2. Apply the gradient to the ends
Using alcohol-based markers (Copic B000 for very light blue, B02 for medium blue), start at the ends of the front highlights. Work with thin strands of approximately 1 cm in thickness. Apply the lightest color to the ends (2–3 cm from the tip). Gradually move up with the medium blue for another 3–4 cm, slightly overlapping the light area. The secret is thin layers — swipe the marker once, release the strand, check the result, and add more if necessary. Do not try to achieve the gradient in a single heavy pass. For the long strands in the back, repeat the process, but with a longer transition (5–6 cm of gradient). Use the darker color (BV04) only at the roots of the strands if the base of the wig is too light.
If you prefer dyeing with iDye Poly, boil 2 liters of water, turn off the heat, add 1/4 of the light blue dye packet, and mix well. Dip only the ends of the wig (or the isolated strands) for 3–5 minutes. Remove and rinse in cold water. The intensity depends on the dipping time — start with less time and do a test.
Checkpoint: Hang the wig on the stand and observe it from a distance. The gradient should be smooth, with no visible hard lines between the colors. If there is an abrupt transition, go back with the marker in the transition zone to smooth it out.
3. Add extra wefts for volume and color
Ganyu has noticeably lighter highlights in the front. If the base of the wig is dark blue, sew or glue silver-white wefts to the inner layers of the front highlights. Use a thin line of hot glue at the base of the weft and press it against the wig cap. Alternate: one layer of white weft, one layer of light blue weft. This creates dimension without one color overpowering the other. For the back, add light blue wefts to the outer layers of the ends. Cut the wefts to the desired length with synthetic fiber scissors, cutting at an angle to avoid an unnatural blunt cut.
Checkpoint: Comb all the strands forward and then backward. The wefts should be securely fastened and not visible at the roots. If the base of the weft is showing, cover it with strands from the original wig or add another layer on top.
4. Style and secure
Ganyu wears her hair long and loose with a distinct strand over her left shoulder. Separate this strand and position it. Apply thermal spray to the ends and use a flat iron (130°C) to add a slight inward curve to the front ends — this creates the "polished" effect from the artwork. Do not try to create waves; Ganyu's hair is predominantly straight with natural volume. Finish with Got2b Glued on the face-framing strands to maintain the shape during the event.
Checkpoint: Put on the wig (with the horns already attached). Shake your head and check: (1) the horns stay in the correct place, (2) the gradient strands fall naturally without tangling with the horn clips, (3) the overall look matches the character's reference. Ask for a second opinion or take a selfie and compare it side-by-side with the official artwork.
Where to Invest and Where to Simplify
If you are on a tight budget, prioritize quality resin for the horns. This is the point where flaws are most visible — cheap yellowed resin or resin full of bubbles ruins the entire cosplay. You can compensate by saving on the base wig and using diluted acrylic paint instead of iDye Poly. Acrylic paint (like transparent Acrilex, diluted in alcohol) works reasonably well on synthetic fiber if applied with a brush and sealed with the heat of a flat iron.
Another smart money-saving tip: instead of buying imported translucent dyes for resin, use translucent oil paint (one drop per 50 ml of resin). Oil paints from Winsor & Newton or even national brands like Corfix in shades of ultramarine blue and dioxazine purple work well. The secret is to use less than 1% of the total volume in paint — more than that will interfere with the resin's curing process.
Do not save on PPE. Epoxy resin without an appropriate mask causes contact dermatitis and respiratory irritation. A P100 mask costs R$ 25–40 and is reusable.
Inspiration and Next Steps
With the horns and wig ready, the visual core of your Ganyu cosplay is complete. To complement it, the Ganyu makeup tutorial covers the iconic facial features — diamond-shaped eyes, blue eyeliner, and the geometric details on the cheeks that reference the Cryo element.
For a complete costume reference, including the bodysuit and lace details, the SanyMuCos detailing shows each component of the premium look and is useful for those deciding between buying or building the costume.
And to see how the final result behaves in motion — stable horns, a flowing wig, secure makeup — it is worth checking out experienced cosplayers like Sarah Crystall, whose work with Ganyu shows the level of refinement achieved with careful planning and execution.
If this guide was helpful, share your result with the Cosplay Orbit community — by tagging on social media, you help other cosplayers overcome the same challenges and receive constructive feedback from those who have already gone through them. Happy building, and see you at the next convention.
