How to Make Nico Robin's Live-Action One Piece Cosplay – Complete Step-by-Step Guide

Introduction

In this tutorial, Taylor (@forging.smores) demonstrates how to recreate Nico Robin's (Miss All Sunday) live-action cosplay from One Piece using a variety of Big Z Fabric materials. The project includes a lined faux suede coat with decorative appliqué and faux fur trim, a structured velvet bodice with steel boning, a custom skirt, textured vinyl belt, armband, and a modified hat.

Throughout the build, she shares practical cosplay construction techniques, explains why certain materials were chosen, and offers tips for working with velvet, faux fur, vinyl, and structured garments.

Materials Needed

Fabrics

• Big Z Calico Python Snake Vinyl (Caribbean Turquoise)
• Big Z Disco Purple Metallic Cayman Gator Vinyl
• Big Z Solid Butter Velvet Upholstery Fabric (Wisteria)
• Big Z Microfiber Suede Upholstery Fabric (White)
• Big Z Crepe Back Satin (Lavender)
• Big Z White Faux Fur

Additional Materials

• Gold fabric
• Heat transfer vinyl
• Tear-away embroidery stabilizer
• Double-sided adhesive sheets
• Canvas
• Spiral steel boning
• Flat steel boning
• Bias tape fabric
• Screw rivets
• UV resin
• Wire
• Cabochon molds
• Decorative trim
• Rope
• Elastic
• Cotton fabric
• White felt hat
• GemTac adhesive
• Celestial charms
• Zipper

Tools

• Sewing machine
• Cricut cutting machine
• Mini iron
• Iron
• Razor blade
• Fabric scissors
• Pins
• Heat press or iron
• Sandpaper
• Spray primer
• Paint

Step 1: Create the Coat Pattern

The coat is made using a modified Yaya Han coat pattern.

The creator removes:

• The lapel
• The center back slit

A mockup is first made from the satin lining fabric to verify the fit before cutting the final suede pieces.

The lining pieces are pinned, sewn together, and the sleeves are basted before being permanently stitched.

Step 2: Decorate the Coat Lining

To recreate the floral lining seen in the live-action costume, flower shapes are cut from heat transfer vinyl using a Cricut machine.

The flowers are arranged across the satin lining before being pressed into place.

Smaller dark pink circles are added to the centers of each flower for extra detail.

Step 3: Construct the Outer Coat

The outer shell is cut from white microfiber suede.

Unlike the lining, the sleeves are left unattached while decorative work is completed.

Step 4: Create the Gold Appliqué

Robin's coat features large gold decorative motifs.

To recreate them:

• The artwork is designed digitally.
• Cut into cardstock templates.
• Transferred onto tear-away embroidery stabilizer.
• Pressed onto gold fabric.
• Cut out and secured with double-sided adhesive.

Each design is attached using a dense zigzag stitch.

The creator recommends practicing stitch length, thread tension, and technique on scrap fabric before sewing the final garment.

Step 5: Add the Sleeve Decorations

Before attaching the sleeves, all of the crescent-shaped decorative pieces are appliquéd onto the fabric using the same zigzag technique.

Although time-consuming, completing these details before finishing the garment produces the best result.

Step 6: Make Custom Rivets

Unable to find rivets large enough, the creator makes reusable decorative rivets using:

• UV resin
• Wire
• Cabochon molds

After curing, the rivets are painted gold and attached through the jacket using the wire, then secured on the inside with hot glue.

Step 7: Assemble the Coat

With all decorative elements complete:

• Sew the shoulder seams.
• Attach the sleeves.
• Install the satin lining.

The coat is flat-lined rather than bag-lined because the interior seams will later be covered by faux fur trim.

Step 8: Add Faux Fur Trim

The coat edges are finished with white faux fur.

Before cutting, mark the fur direction to keep every strip running consistently.

Cut only the backing with a razor blade to preserve the fur fibers.

Multiple strips can be joined together since faux fur naturally hides seams.

The trim is hand sewn around the coat to conceal the lining seams.

Step 9: Construct the Bodice

The bodice uses the Colette corset pattern.

A mockup is first created and later becomes the structural canvas layer inside the corset.

Cut the velvet while paying attention to the fabric nap.

Sew the princess seams carefully, then attach the shoulder straps.

Construct the satin lining separately.

Step 10: Add Structure

The velvet shell is sewn to the internal canvas layer before attaching the lining.

Insert:

• Spiral steel boning
• Flat steel boning

Cover the ends of the boning and prepare custom bias tape.

The bias tape is machine sewn on one side before being hand stitched to the inside for a clean finish.

Finally, install the grommets, screw rivets, and modesty panel.

Step 11: Make the Skirt

The skirt is created from a simple tapered rectangle.

Sew the side seam and install a zipper.

Because the creator's body shape requires additional length in the back, the rear hem is intentionally cut slightly longer to ensure the skirt hangs evenly when worn.

Leather trim is hand sewn along the hem.

Step 12: Construct the Belt

Cut a wide strip from the turquoise python vinyl.

To give the belt dimension:

• Wrap rope inside the upper and lower edges.
• Cover the rope with gold trim.
• Sew decorative gold tubes onto the belt.
• Finish with additional decorative trim.

Step 13: Make the Armband

The decorative medallion is:

• 3D printed
• Sanded
• Coated with resin
• Primed
• Painted gold
• Weathered

The armband itself is made from the metallic purple vinyl.

Elastic is sewn inside to make it easy to slip on and off.

Because hot glue does not adhere well to the vinyl, a strip of cotton fabric is sewn underneath before gluing the medallion in place.

Step 14: Modify the Hat

A plain white felt hat serves as the base.

Gold trim is woven through holes cut around the hat to recreate the spiral design from the live-action costume.

Celestial charms are attached with GemTac adhesive to imitate the subtle embossed stars.

Step 15: Complete the Costume

Finish the cosplay with:

• A black bob wig
• Trimmed bangs
• Character makeup

The completed costume closely recreates Nico Robin's live-action appearance.

Tips from the Creator

• Use a leather needle when sewing vinyl.
• Always make a mockup before cutting expensive fabrics.
• Practice decorative zigzag appliqué on scraps first.
• Mark the direction of faux fur before cutting.
• Cut only the backing of faux fur using a razor blade.
• Sew princess seams slowly for smoother curves.
• Use a mini iron when pressing small garment sections.
• Slow the sewing machine near steel boning to avoid breaking needles.
• Flat-lining works well when decorative trim will cover interior seams.
• Adding extra length to the back of a skirt can help it hang evenly when worn.

Final Result

The finished cosplay features a fully lined white faux suede coat with floral satin lining, custom gold appliqué, faux fur trim, a structured velvet corset with steel boning, a custom-fitted skirt, textured vinyl belt and armbands, handcrafted resin rivets, and a modified hat. By combining upholstery fabrics, cosplay techniques, and custom embellishments, the project faithfully recreates Nico Robin's live-action costume while showcasing durable, high-quality materials suitable for advanced cosplay builds.