Sirenix (Form)/Appearance

Original
The outfits consist of a sparkly mermaid skin-like tube or tank top, a tulle skirt, scale-like colorful leggings with fins and boots with ribbons wrapped around them. The hair is often in a ponytail, with highlight streaks and the hair changes its colors when they go underwater. The fairies also wear bands made of a piece of jewelry, flower, or marine creatures and ribbons around their arms, and a piece of jewelry in their hair. The wings are colorful and seashell-shaped.

Redesigned
The outfits still consist of a short sleeve top, but instead of mermaid skin-texture, now it is scale-texture, and leggings with fins and boots. The outfits in general are more colorful than the previously monotone designs. The cut-outs on the tops are removed, and altered outfits have more bands and ties and jewels on them. The accessories (hair and hands) are altered, they loose some aquatic traits. The hair styles are unchanged (or under extremely minor change), but the highlights are recolored to match with initial concept (Stella's highlights are now reddish pink and Flora's pink highlights are now visible). The hair no longer changes color underwater. There are short translucent frills on each side of the top, like on the Harmonix concept art. The wings are unchanged, aside from Bloom's being recolored.

Crystal
The outfits borrows some elements from Lovix with winter-based theme. They wear colorful tops with snowflake-like geometric decorations, with fuzzy areas at the top and also fuzzy tutus-like skirts. They also wear fuzzy-edged fingerless gloves on both arms and plaid-like scale patterned leggings, geometric-decorated boots with fuzzy areas. They have a long, fuzzy-edged cloth attached to the back of the skirt, similar to Harmonix's. The hair remains the same, but now decorated with sharp star-shaped jewels and thorns at the top. The wings are unchanged.

Dark Sirenix
The outfits consists of a body suit, a pairs of stiletto with fins, a glove made of the same material. They wear smeared makeup on their eyes and lips. Their hair is in high ponytails or pigtails, they also have matching-color tentacles on their backs.