Here is a description of what Sirenix looks like:
* Head: The Winx have long, flowing hair with highlights that match their Winx color or an iridescent sheen with sea-green undertones. Their eyebrows get wider and arched, and they have sea-green eyeshadow and mascara.
* Body: The Winx have a slim figure with curves and muscular definition. Their skin tone is slightly paler than their normal form.
* Outfit: The Winx wear a two-piece outfit that consists of a bikini top and a long skirt/bottom with a tailfin and a transparent fabric. Their outfits are decorated with sea shells, gems, and coral. They wear matching headbands and arm bands.
* Accessories: The Winx wear seashell-shaped earrings, necklaces with a large water drop crystal, and bracelets. They also have wings shaped like sea shells that are translucent with bright blue tips. Their shoes are sea shell-shaped sandals with a small heel and blue bows.
* Mermaid Form: When in the water, the Winx's legs transform into a powerful mermaid tail that matches the color of their outfit. Their mermaid tails are translucent and have scales.