Nebula

Nebula is introduced as one of the Earth Fairies who was sealed by the Wizards in the Kingdom of the Fairies, and finally became the new Queen of the Earth Fairies.

Season 4
She strongly wishes to get her revenge on the Wizards of the Black Circle. In episode 9 of season 4, Nebula possesses Roxy through the White Circle and goes out to take down the fairy hunters herself with Roxy as her vessel. The Winx Club trail the possessed Roxy to the warehouses on the docks where a battle royal between the Wizards and Roxy ensues. The Winx Club interrupt, much to Nebula's dismay. The wizards escape as the Winx Club are occupying Roxy wondering about her sudden personality change. Nebula threatens to make them pay as they gave the wizards an opportunity to escape by making a large sphere of energy surround her to presumably harm the Winx. The Winx Club surround her and make shields that reflect the energy of the sphere to Roxy and forces Nebula to leave Roxy, who faints out of having exhausted her powers in fighting the Wizards.

Her vendetta against the Wizards of the Black Circle leads her to overthrow Morgana as the Queen of the Fairies with Layla as her second in command and to cross pass through Magix into the Omega Dimension to destroy the Wizards, after announcing to the Winx that she planned to lead the Fairies into taking the control of world from the humans. After the heated final battle with the Wizards who became defeated and frozen, she saw the error in her vengeance and wanted to stay in the Omega Dimension as a way to punish herself, telling Bloom that she had become alike to the Wizards. When Bloom told her that she was still Good, and that there still was light in her she returned with the Winx out of the Omega Dimension and was forgiven by Morgana, the Winx Club, and the Fairies of Earth. Nebula then lead the Tir Nan Og Fairies in restoring magic on Earth so as to restore the balance of the forces of nature and allow new fairies to be born on Earth. Morgana decided to stay with her family and gave the Crown of the Earth Fairies to Nebula who she believed would do an excellent job protecting the Earth Fairies, making her the Queen of Tir Nan Og.

Abilities
She's the fairy of Storm (like Stormy).

Spella
 * Electric Storm