At the center of the look was a custom metallic bra by Karine Gasparyan. The sculptural silver piece appeared molded directly to Fox’s curves, with metallic hands strategically wrapping around her chest. Rather than resembling a traditional bra, the design looked almost as if an artisan had molded liquid metal directly across her body.

A matching sculptural piece wrapped around her neck before dripping down her torso, further enhancing the supernatural effect.

Fox paired the barely-there metallic top with a shredded sheer skirt that sat low on her hips. Crafted from distressed, semi-transparent fabric, the floor-length piece featured torn sections, loose threads, and trailing material that moved through the water. The combination gave her costume a deliberately weathered appearance.

The setting made the Halloween costume even more dramatic. Fox posed among rocks and dark water underneath a full moon, with mist surrounding the landscape. In one shot, she leaned against a massive rock, while another showed her partially submerged in the water.

She captioned the Instagram carousel, “the song was the trap, and the sea was the grave,” leaning further into the mythology surrounding sirens.

Her beauty look followed the same aquatic theme. Fox wore her dark hair long, wet, and tousled, while tiny crystals were scattered across her face. Shimmering silver eye makeup, luminous skin, and glossy lips completed the look. Her hands were also coated in silver, with extremely long, pointed metallic nails adding to the intricate details.

Gasparyan confirmed on Instagram that the metallic design was a custom piece created for Fox. With its sculpted bra, delicate skirt, on-point styling, and haunting backdrop, Fox’s Halloween transformation offered a darker take on the classic mythical siren.