Icy, like her name, is a cold type of person, and often acts cruel for the sake of being cruel. She tends to act rude and ridicules people she does not approve of. Her temper tends get the better of her when things do not go her way. As she was taught by Headmistress Griffin, she and the other witches, Darcy and Stormy, hate the Alfea fairies extremely, and especially the Winx Club, specifically Bloom (in the Rai Version), or Stella (in the 4kids version), because they evade them time after time. She would often call the fairies "pixies", but after the introduction of the Pixies in Season 2, she called them "twerps," "geeks," and "losers." As she was very cruel, she always fought her way to be the best and most powerful and for many seasons Icy and her sisters have continuously reappeared to destroy the Winx. She is the cruelest and most vindictive of her sisters, and is Valtor's favorite more often than Darcy or Stormy. An old nickname, mentioned in Season 3 by Darcy while hanging out in Valtor's lair eating ice cream, was "Six-Scoop Icy", because she ate so much ice cream when she was younger. It is unknown if Icy, Darcy and Stormy are actually sisters; "sister" is a term often used about good friends, or more likely, in a coven. As leader of the Trix, she enjoys tormenting her "sisters" if something goes wrong for them, but right for her. She often tries to destroy the Winx without the other members of the Trix as she considers herself more powerful and intelligent that her "sisters" are.
Icy had always been able to steal the spotlight as the more evil, whoever plan it may be. She usually starts as a second-in-command and as seen in Season 2, fought with Darkar to gain the ultimate power. She had always gotten the stronger and leadership part of her evil group. Often, Darcy and Stormy are forgotten and when important matters of the Trix is discussed, Icy's name is mentioned more. The Gloomix the Trix got was somewhat similar of Darcy and Stormy, whereas, Icy's was different indicating her leadership. Also, when being trapped Icy would always be the first to escape but Icy has shown that she needs her "sisters" whenever a plan is hatched.
Story in Winx ClubEdit
Icy was the main antagonist of the first season along with Darcy and Stormy. She ordered Knut to find Stella's scepter and find Bloom. She meet Bloom who Darcy caught spying on them. When the other girls arrived to help her, she proved to be far more formidable. When she was just about to contain the Winx in her Ice Coffin, at the last minute, Stella used her powers to get Bloom and the others out of there. Icy also became the victim of a prank set up by the Winx: Pepe, a cute little duck who saw Icy as his mother. After obtaining Stella's ring they soon realize, it was not the vessel for the Great Dragon, but a while later, she found out Bloom was. During the Miss Magix contest (in the original version), she cast and removed a spell on her classmate Lucy. After the incident with the Nightmare Gargoyle, she, along with Darcy and Stormy, were expelled. Later, Icy, Darcy, and Stormy went to Earth to steal Bloom's power. Before that happened, Icy enlightened Bloom by filling in the missing pieces of her past. After which she, Darcy and Stormy yanked Bloom's power out of her with their vacuums. She and the other Trix then took over Cloud Tower and summoned forth the Army of Decay. Icy herself completely destroyed the Red Fountain Campus by calling forth an Ice Dragon to wrap around the campus, thus freezing it. She faced Bloom in one final confrontation after she got her powers back. She lost, and was sent to Light Rock Fortress.
Winx Club: One-Hour SpecialEdit
Icy appeared in this special along with her sisters Darcy and Stormy. She "introduced" herself to Bloom by trapping her in ice. Later, she and the other Trix summoned a Cretian Minotaur to trash the school, but they were caught by the Winx and Miss Faragonda. They managed to enter the magical reality chamber to get Bloom's power but failed.
Winx Club: Revenge of the TrixEdit
Icy manages to trick Bloom into thinking, she was a witch but was foiled by Mirta, who Icy turned into a pumpkin. She then went to Earth along with Darcy and Stormy to steal Bloom's power, and she also managed to connect the dots for Bloom about her powers.
Winx Club: The Battle for MagixEdit
Icy along with Darcy and Stormy managed to take over Cloud Tower, summon the Army of Darkness and destroy Red Fountain. She had a final confrontation with Bloom which resulted in her defeat and the Trix's downfall.
Icy and the Trix had a smaller role in this Season. The three appeared in the middle of the series much meaner and more powerful than before; but are still defeated by the Winx Club and their new member Aisha. Later, she is shown joining forces with Darkar even falling for him like Darcy and Stormy. In "Reaching for the Sky," Icy solved the riddle "What equals the weight of Red Fountain?" by placing a statue of a mage wearing a robe which indicated wisdom on the other pedestal on the Scale of Justice. In "Pixie Village," Darkar summoned Icy to follow Livy to Pixie Village when his "Avalon" pretended to be sick. She managed to freeze the village and threatened Ninfea to give her the fourth Codex, but was robbed of it by Livy. Icy then chased Livy into Downland where she battled Queen Amentia. When it seemed like Icy was done for, Darcy and Stormy arrived to aid her and they steal the fourth Codex. When they were betrayed Icy, Darcy and Stormy merged together to form the Mega Trix, a dark witch with their three powers combined and all three in control. After Darkar's defeat, the Trix Sisters are able to escape.
Winx Club: The Shadow PhoenixEdit
Icy was seen in Light Rock Fortress after her defeat at the hands of Bloom. She, Darcy and Stormy were rescued by Darkar and were given their Gloomix powers. She managed to steal the Codex from Pixie Village without any difficulty. After Bloom went Dark, Darkar took back their Gloomix and sent Icy, Darcy and Stormy back to Light Rock.
thanks to the Light Rock guards hoping Icy and her sisters' hearts will freeze. Icy got out easily cackling and saying, "You think you can freeze my heart? Don't you know that my heart is so cold, it's a block of ice!" The Trix appear with Valtor near the beginning of the season and start to work for him. Icy begins to develop a crush on him like the other girls, but starts to doubt Valtor's power when he starts using them for his bidding. In order to become a decent match to the Winx and their Enchantix powers, Valtor grants Icy and the Trix with their own Disenchantix; but still are defeated in the end. She and her "sisters" later laughs to Valtor, reminding him about his defeat at Alfea. When Valtor transforms into monster, Icy loses a little of her respect toward him and even admits that she, Darcy and Stormy have bad taste in men. Valtor hears what they are saying and shows his true powers by unleashing spell of the elements all around Magix. When seeing how Winxs stole Agador box from Valtor and manhimself being "monkey in the middle" she loses the last of her respect for him and leaves. After Valtor's defeat, they are again captured and sent back to the Lighthaven Prison for their attitude change. They show up at intervals throughout the season, causing mayhem and sometimes causing the Winx to earn their Enchantix, such as when the Trix went to Linphea and attacked the Winx Club, resulting in Miele getting knocked into the water. Flora earns her Enchantix becuase of this, so Icy indirectly helped Flora earn her Enchantix.
Icy along with Darcy and Stormy show up in the beginning of the movie when they sneak into Alfea and ruin the beginning of year ceremony as a diversion to be able to steal a magical compass. The Trix use the compass to locate the Pixie Village. Once there, they lead the Ancestral Witches to the Tree Of Life. Unfortunately for Icy, her obsession with wanting to kill Bloom ultimately became her downfall and lead to the Trix and Ancestral Witches' defeat.
In Season 5, Icy and the other Trix are seen in the prison of Andros, where they meet Tritannus, who seems to be interested in her. After he turns into a monster by absorbing pollution from an explosion on an oil rig on Earth that spread through the oceans and reached his cell on Andros, he and the Trix escape from prison together. The Trix and Tritannus then go to Earth to gain more pollution as the Winx battle them and knock Stormy and Darcy out Icy stays fighting them until Tritannus defeats the Winx and they go back under the water.
Icy and the Trix receive and power up from Tritannus to better fight. They then go to the Archives of Alfea and a battle begins. Icy tries to hurl ice and Bloom but Sky jumps in the way and falls off the platform causing him to gain amnesia. The Trix then leave as Faragonda and Griselda arrive.
Icy reports to Tritannus about the fight but he gets mad because they did not finish off the Winx. The Trix sneak outside Alfea as Darcy plants a curse of Tecna's phone. Later on, after gaining Daphne's cursed Sirenix in Sirenix. She intercepts a fatal blow from Bloom's Lava Jab saving Tritannus, in "The Pillar of Light." In "Eclipse," she was revealed to be okay. Later during the getaway Tritannus acknowledges that she protected him. She then replies by saying that she would do anything for him.
After that Tritannus protects Icy from Devourer and after getting the seal from Pillar of Balance, he protected her from the Winx. Darcy adn Stormy had possessed the Singing Whales of Melody and they tell Icy to ditch Tritannus, which Icy again refuses. When Winx destroyed the final seal, Darcy and Stormy left Tritannus and Icy, believing that Tritannus dreams wont come true. Icy stays by his side and tries to get Sirenix Powers of Politea, Daphnes old friend. Unfortunantley Daphne warns Bloom, who gets into Icys way and for more of an trouble, Darcy and Stormy steal Politeas powers right in front of Icys nose. Icy brings Tritannus to Earth, where she freezes an factory that Tritannus uses to create an pollution rain to refuel. Tritannus then attaqcks the Pillar of Light to get Aisha and her Sirenix to power up the Throne. After succeeding, Tritannus is possessed by Thrones destructing power and he attacks Icy, who is then protected by Darcy and Stormy. Icy reunites with her sisters and brakes up with Tritannus. They try to win Tritannus, but instead he sends them flying away, leaving their fate and current location unknown.
Against Sora's TeamEdit
When she and her sisters joined Maleficent's team, she still complaines about the other recruits, and when she is sent to eliminate the team, she starts off with Bloom And Me/Kamen Rider Blade always.