Nebula

Queen Nebula was originally known as the Major Fairy of Peace. After she was captured by the Wizards of the Black Circle, she became known as the Major Fairy of War. After the Wizards of the Black Circle were defeated, she was crowned Queen of Tir Na Nog when Morgana abdicated her throne, acting as a regent for Roxy.

Appearance
Nebula has shoulder-length deep blue hair, blue eyes, and a fair skin tone. She wears a purple dress which becomes violet at the end of the right side. On her top left side, there is a part of short sleeved purple top seen. She has elbow warmers with a transparent fabric on the top. She wears barefoot sandals and has large blue wings that points upwards.

As of Season 6, her wings are sparkly and more iridescent, possibly hinting at a change after becoming queen and losing her vengeful personality.

Personality
Nebula used to be blunt and would take the path of vengeance. She would be quite challenging and even would go as far as shouting at and blatantly disobeying and disrespecting Morgana.

She is now a lot more compassionate, kind, caring and friendlier, showing a warmer side to her. She is still fiercely protective of her fairies and will not hesitate to punish those who threaten her kingdom's safety.

Magical Abilities
Ability-wise, she is extremely powerful as she proved a challenge for Bloom in a one-on-one fight in the episode "Bloom's Trial". This is a very impressive feat, especially if taken into consideration that the Winx's combined attacks failed to defeat Bloom both in season 2 (when she was Dark Bloom) and in season 3, when they tried to figure out a way to defeat the Dragon's Flame. The fact that Nebula alone proved to be a very difficult challenge to Bloom in a one-on-one fight is a testament to her extraordinary power. Aside from some of the big bads, such as Valtor, Acheron, Politea, Belladonna, Nebula and Icy are the only ones who proved to be powerful and brave enough to go up against Bloom and hold their own against her in a one-on-one battle. This probably makes Nebula's power level similar to that of Icy (although it should be noted that Icy's powers have grown since the events of season 4, so it's difficult to make a direct comparison).

Nebula's attack spell Electric Storm seems to indicate some connection to electricity, being that thunder or lightning is a sign of judgment or war. Also she has shown to be very strong in using her telekinesis in battle in which she controlled ice crystals in which she hurled at Bloom in Aurora's Frost Tower, and able to shoot very powerful purple, pink, and orange energy beams at her opponent. As the Major Fairy of War, Nebula seems to have the emphatic ability to manipulate others to her cause to some extent making them wish to fight with her or against her, or it could be her personality. It is said in the Season 4 that she once was the Fairy of Peace, but due to her hatred of the Fairy Hunters, she became the Major Fairy of War. She can also teleport as shown in “Bloom’s Trial”. Using magic at times can turn her eyes solid green.

Nebula may know other first-level spells all fairies can use such as transmuting objects, and fixing minor messes. Like all fairies she can fly. Other abilities include possession, manifesting a visual , and creating a hollow ice block which insulates heat (prevented Roxy from freezing to death).

Uses of Magic

 * Electric Storm

Trivia

 * A nebula is an interstellar cloud of various gases and dust. It also used to be used as general term for any unidentified object in space.
 * The word nebula itself means cloud in Latin, which could be a reference to the Greek Goddess of Revenge, Nemesis, who was duty-bound to give humans divine punishment of the Gods. As a goddess, Nemesis lived above the clouds on Mount Olympus.
 * Nemesis' role as a divine punisher could have also been the basis for Nebula's insatiable thirst for vengeance upon being freed.
 * In the Cinélume dub, she shares her voice actress with Professor Griselda.
 * In the Nickelodeon dub of Season 6, Nebula is voiced by Grey DeLisle, who also voices Griffin, Marion, Niobe, Ninfea, Belladonna and Tecna's Guardian of Sirenix.
 * In Season 6, she is not seen wearing her crown.
 * This also happens in Issue 133 of the Winx Club Comic Series, as Morgana is also seen wearing the crown of the Earth Fairy High Queen despite having stepped down.