Politea

Politea is a Sirenix possessor and a nymph.

Personality
From the first sight, she seems kind, caring and innocent. But when the Ancestral Witches cursed Daphne, she seemed happy seeing it. She seems to be fond of double-crossing which was evident with Daphne, Icy, Darcy and Stormy.

Appearance
She has long brown hair with a fringe that falls on her face and a bun at the back of her head. She has green eyed and rose lips. She wears a long lime shawl that is used as a shawl, a choker and a belt. She also wears a red dress with the tips of it looks like it was ripped and a pair of pale yellow sandals.
 * -|Civilian=

As a monster, Politea looks like a purple dragon with wing-like flippers instead of arms and a large frill on her neck. She also has two small frills in her cheeks.
 * -|Monster Form=

In this form, her skin is pale grey. Her hair is pale turquoise and is long with a fringe that falls on her face. She wears a fuchsia crown that looks like a seashell or the frills she had in her monster form and a long pale blue dress resembles a jellyfish with short sleeves that look like the frills she had as a monster over longer sleeves, and the top is a purple scale-like breastplate and. Her eyes are dark red and her lips are purple.
 * -|Evil Sirenix / Nymph Form=

Pre-Series
Politea was an old friend of Daphne and they fought together against the Ancestral Witches. However Politea betrayed Daphne and did not assist her against the Witches when she needed help the most, and the Witches were able to place a curse on Sirenix, turning Daphne into a spirit and Politea into a dragon-like monster.

Season 5
She makes her first appearance in "The Shark's Eye." She was seen in a vision by Bloom in the Fairy Clock Room, where she learns the story of how Politea betrayed Daphne and both of them were cursed. She lives somewhere in the Infinite Ocean, in a cave shaped like a shark's head called the Shark's Eye. Later, her powers were absorbed by Darcy and Stormy and she faded.

The Mystery of the Abyss
Politea will be the main villain in the third movie. While trying to activate the Emperor's Throne, the Trix will accidentally evoke Politea, who is still cursed and is ready to ally with the Trix. She tells them that, to activate the Emperor's Throne, they need to free Tritannus from Oblivion but that they need the vital force of a king for that. The Trix kidnap Sky and free Tritannus, who becomes their ally again to get the Pearl of the Abyss.

Magical Abilities
Since she is a Sirenix possessor and nymph like Daphne, she could possibly have similar powers. When she was cursed by the Ancestral Witches, her Sirenix power became evil, like the Trix's Dark Sirenix.

She can also revert any spell which was seen when the Trix is about to attack her. She made Icy freeze herself, Darcy trap herself with the octopus tentacles and Stormy electrocute herself.

She can shoot turquoise and pink beams of energy. Also, similar to Tritannus, she can be empowered by pollution. The evil in her Sirenix was dispelled by Darcy and Stormy. Although she cannot return back to her original form, the humans polluted the oceans and upset the balance of the Infinite Ocean, which helped her regain her energy back.

With her power combined with the power of the Pearl of the Depths, she can easily pollute the oceans of Magix and can make herself powerful than the emperor himself.

Also, she was shown to have the ability to easily enter the Oblivion dimension, unlike the Winx who needed to converge their magic to enter the Infinite Ocean from Oblivion.

Trivia

 * In Greek, Politeia (πολιτεία) means "Citizenship".
 * Politea could be a witch and not a fairy. First, Faragonda just said that Sirenix was an ancient power and not exclusively for fairies. Second, She does not have wings, instead, she uses jellyfish tentacles. Third, she does not react when the Winx says she is a witch.