Wearing this Genshin Impact Furina Letter from the Deep Sea cosplay costume, my first impression was that the amount of detail in this look is genuinely massive, especially when trying to present a fresh yet gorgeous effect in mirror selfies. Starting from the wide-brimmed hat on top, the brim isn't just a simple design; it features a full rim of delicate lace trim, which, combined with the two long dark blue ribbons hanging down, instantly brings out a sense of dynamic charm and a deep-sea magician aura. The wig chosen is short silver-white hair with a very smooth hair texture. The bangs are trimmed just right, framing the face nicely when worn and complementing the hat perfectly.
Looking further down, the off-the-shoulder corset top is the center of this entire outfit. The dark blue and black woven fabric seems to carry a velvet-like texture inside, offering a nice fitted hug around the arms and upper arms. The oversized diamond-shaped sapphire on the chest is extremely eye-catching; its facets reflect a deep glow under indoor lighting, and the surrounding golden frame setting makes the entire neckline area look much more lavish. The sleeve cuffs feature a flared shape, giving the shoulder line a more refined visual effect.
I also really love the design of the gloves. The long blue-gray gloves extend above the elbows, made of a material that fits skin closely, while the fingers and back of the hand feature textures that accommodate natural movements. The most unique touch is that the forearm portion of the gloves is scattered with fine star sequin embellishments, looking as if stars from the night sky or deep sea were printed directly onto the fabric. Under changing light, they cast a dreamy shimmer, which looks especially photogenic and layered in mirror selfies.
The puffy skirt for the lower body adopts a gradient and pieced design concept, transitioning gradually from deep ocean blue at the waist and hips down to a clear light aqua blue, and finally edged at the hem with a wide rim of airy white ruffled fabric. This fabric feels soft yet has an excellent drape. Turning gently in front of the mirror during the shoot made the skirt lift slightly, carrying a dynamic beauty like ripples on the sea surface. Black ribbons decorate both sides of the skirt; these ribbons are not merely decorative, but also help gather the silhouette of the skirt hem, preventing the lower half from looking overly loose and instead giving it good structure and shape.
The leg accessories are another detail that cannot be overlooked. The left thigh features a thigh ring adorned with a gemstone and a golden arrow-shaped metal pendant. This accessory not only adds a mysterious element to the character but also serves as a great visual accent, highlighting the leg line in mirror photos and unifying perfectly with the overall fantasy magic aesthetic of the cosplay outfit.
This photoshoot opted for an indoor mirror selfie approach, utilizing the unique reflective properties of the mirror to fully showcase the front and back details of this Letter from the Deep Sea look. While adjusting my hair and hat placement, light happened to spill in from the front side, leaving natural light-and-shadow transitions across the sapphire and the gradient skirt. The entire process didn't use complicated camera equipment; relying solely on the phone in my hand and a clean mirror, I captured the serene atmosphere belonging to the character. In fact, for this look, overly exaggerated poses aren't necessary—standing slightly sideways in front of the mirror, gently lifting the skirt, or lightly raising one hand as shown in my photo is already enough to convey the character's calm, elegant, and divine quality infused with deep-sea charm.
Special attention needs to be paid to hand gestures during mirror selfies. Since one hand holds the phone to take the photo, the posture of the other hand requires extra care; I deliberately adjusted my hand pose to make the overall composition more lively. The wig and costume fit closely together, and putting on the hat also tested my angles, but through continuous fine-tuning, I gradually found the most suitable wearing position.
I particularly love the expression of the deep-sea theme in this outfit. Blending different layers of blue and white, accented with golden borders and dark ribbons, it effectively conveys the deep, mysterious, and slightly lavish charm of the ocean floor. Instead of relying on a cumbersome floor-length gown, it adopts a short puffy skirt design, which doesn't hinder movement or posing for various selfies while nicely revealing the leg line to visually echo the thigh ring.
This attempt also gave me a deeper realization that a good cosplay costume brings more than just visual beauty—the moment you wear it, it feels as though you are stepping across dimensions to connect with the character you love. Although mirror selfies come with compositional limits and can't orchestrate complex lighting like studio photography, their advantage lies in authenticity, naturally fusing everyday displays with roleplay. Furthermore, dark-toned clothing indoors can easily be affected by lighting, but fortunately, the glitter on the fabric and the translucency of the gem were good enough that it maintained an outstanding texture even under simple lighting.
The entire dressing process went very smoothly, with every strap and accessory securely fastened. The lace-up design of the corset allows it to fit the body's curves closely when worn, creating a very beautiful silhouette without looking bulky. The mix-and-match of feather, lace, and silk materials creates rich layering, making it pleasing to admire whether looking closely at details or viewing the overall silhouette from a distance.
This share is mainly meant to pass along the joy of Genshin Impact roleplay, allowing everyone to feel the unique charm imbued in Genshin Impact Furina under the Letter from the Deep Sea outfit. A good work requires not only gorgeous makeup and photography, but also heartfelt preparation and an understanding of the character's traits behind the scenes.