Tritannus

Tritannus is an enemy that the Winx Club face in Season 5. He was once a normal triton, the son of King Neptune and Queen Ligea, and the twin brother of Prince Nereus who was jealous that his brother had been chosen as future King of Andros instead of him. He tried to disrupt his brother's crowning ceremony, but was arrested and sent to the prison of Andros. He later escaped to Earth and was turned into a monster by pollution and allied himself with the Trix. His goal is now to rule all the world and to conquer the Infinite Ocean and caused pollution so that he may grow stronger. The Winx go underwater to fight him, but their Believix powers are not enough. They will have to look for the Sirenix ocean/sea-themed power and become mermaid fairies.

Season 5
He is introduced in Season 5 as the cousin of Aisha and as the son of King Neptune and Queen Ligea as well as the brother of Tressa and the twin brother of Nereus. His father was going to choose Nereus to become the crowned prince and the future king and Tritannus, who was absent from the crowning ceremony, "having made his choice" according to his father. He tried to assassinate his brother during the ceremony but was defeated by his father who had sent him to the prison of Neptune's son officially removing Tritannus's title as prince.

While he was in prison, he met the Trix because the Trix's cell were rightly next to Tritannus's. Later, an explosion occurred near Gardenia that caused an oil spill in the sea which reached the cell of Tritannus, turning him into a gigantic mutant monster and he, together with the Trix, escaped from prison and he stole the powers of the Selkies of Andros and of Earth, vowing to hunt down all the gatekeepers and to steal the powers of each of them so as to be able to enter the Infinite Ocean and to set to conquer the whole Magic Dimension from there. He then restored the powers of the Trix, which had been taken from them, but when he used up all the pollution he absorbed, he lost his monster form and the powers he obtained from them.

He then went to Gardenia to absorb more toxins so as to become stronger and when the Trix sensed fairy magic there and found out that the Winx had brought magic back to Earth. Tritannus ordered his minions to destroy the Winx. The Winx defeated the minions and followed them, resulting in Bloom, Stella and Musa facing the Trix in an aerial battle above the sea and Aisha, Flora and Tecna facing Tritannus and his minions in an underwater battle, with Aisha fighting her cousin face-to-face. While Aisha recognized Tritannus as he began to lose his monster form after using up all the toxins he absorbed, Tritannus did not recognize her.

After escaping back to Andros, he angry berates for his minions about chasing fish and not looking for pollution. After Icy told him they did not have enough power to defeat the Winx's Believix powers, Tritannus gave Trix much more powers than before. At this point Tritannus was also obsessed of finding more toxic pollution.

Tritannus later learned about Sirenix from Icy. He went along with his minions to his former home to learn more about Sirenix when he ran into his twin brother Nereus and mother Ligea. Nereus tries in vain to convince his brother that he was once a good person, but transformed him into a mutant Triton. He then forced his mom to tell him about Sirenix after threating to kill his brother. When his mother could not tell Tritannus the information he needed, other than that the last one who possessed it was Daphne, he transformed her into a mutant mermaid just like the rest. He later contacted Icy, telling her about his plan to hunt Daphne, and she tells Tritannus where they can find Daphne.

He later tells the Trix to attack the Winx Club in Graynor. He is then seen in Andros, talking with his mother and brother on how he will reunite them with King Neptune and Tressa.

He then goes to Solaria and absorbs Illiris's power. But when he reached Solaria and mutated a jellyfish, he returned to his original form, running out of toxic pollution. He then returned to Earth in order to get more pollution. The Trix who had already arrived on Earth per Tritannus request, Darcy hypnotized the worker and order them to drop oil cans into the water so that Tritannus can absorb it. When that did not work, Icy ordered one of them to open a pipe which released a huge amount of oil that Tritannus absorbed, which restored him to his full power. Satisfied, he returns to Andros.

When he finally reaches his father's palace he contacts Icy, telling her that he is really gonna invade the palace. Through a tough struggle, he success in mutating King Neptune, his guards, and Tressa into mutants and takes Nissa's powers, which granted him the power to enter Magix's oceans. He also absorbed King Neptune's sword, which made him even stronger. He then travels to Melody by taking Sonna's powers and tries to turn Aisha into a monster, but turns Musa into one instead. He finally travels to Lake Roccaluce and kidnaps Daphne in order to learn more about Sirenix.

He travels then to Zenith where he absorbs Lithia's powers and turns the guards of Databridge Castle into mutant merman. He gives the Trix and invisibilty spell to take Bloom so Daphne would give them the secret of Sirenix. Meanwhile he absorbs Desiree's powers and enters the Linphea gate to poison an flower which Winx need in order to get Sirenix. At Andros, he still tries to force Daphne into talking, unsuccessfully. Icy then remembers that it is day of Domino's dawn ceremony and that Oritel and Marion would be easy to target there. Daphne is shocked and Tritannus sends Trixs to imprison them while he gos to hunt down Serena, last Selkie he needs to get into Infinite Ocean. He goes to Earth and absorbs Serena's powers. He also made small trip into Yellow Reef of Domino to poison its corals. After Icy had Oritel and Marion frozen solid, he gets Daphne to tell him the secret of Sirenix. It leads him to search for Source of Sirenix from lake Roccaluce and absorbs that power causing the lake to dry up. He leaves an oil monster to guard the cave and tries to return to Andros, but Selkies stop him and they have a fight, which Bloom, Stella and Aisha soon takes part. Tritannus manages is captured by Aisha and Bloom demands to know where Daphne is held, but then she is forced to save the lake and let Tritannus flee. Back at the Andros, Tritannus absords Daphne's Sirenix, which mutates in his trident and then grants its darker version to Trix. Thinking he had won already, he enters the Infinite Ocean along with Trix, mutants and the captive Daphne. There, he poisons an green giant rock, summoning more and more mutants which bow down to him while he plots a terrible plan against his cousin Aisha and brags about destroying the Winx Club for good.

Once in the Infinite Ocean, Tritannus tries to activate the Emperor's Throne, but is unable to do so and tries damaging the Throne with his trident, but it attacks it and drains him of his powers, and he has to refuel on Earth, using the toxins from a garbage island. The Winx, investigating the garbage island, find Tritannus and the Trix who flee into the Infinite Ocean, and the Winx follow them there as well, to their surprise. After a short fight, Tritannus shows his mutated family and tells the Winx that to destroy him they will have to destroy his, and Aisha's, family as well, and he then runs away with the Trix and his mutated family to activate the Emperor's Throne and she breaks the spell. In Eclipse he vows that he will not let any hurt Icy again he then says that he will bring the whole magical universe down, one pillar at a time.

Magical Abilities
Tritannus in his triton/merman form is incapable of using magic independently. Like King Neptune and Tressa, he is quite a master in physical combat. His weapon is a trident. With his trident, he is able to cast average magic blasts and bursts.

He has ability to drain toxic pollution in order to gain magical powers and monster form, though its possible all magical sea-creatures possess that skill, but they are trying to avoid touching pollution.

He is much more powerful in his monster form, gaining the ability to cast basic spells alone (like telekinesis) and gaining a certain resistance to magic. His magic blasts with the trident is much more destructive and carries the power to mutate other people it hits. However, he can only use so much of his monster power before being change back to a triton and have to look for more toxins to change again. But in later episodes, he appears to have not changed back to his original form but after he stole the Illiris' powers and entered the gate to Solaria he changed back and asked the Trix to find more toxins on earth. He also absorbed the power of King Neptune's sword, which allow him to see what the people of Andros are doing right now. He is also able to tell which mutant are his family or the guards.

He has every gatekeeper power from each planet of Magical Dimension, namely Winxs home planets, thus making him capable of entering the Infinite Ocean.

In Infinite Ocean he stabbed an green rock with his trident and summoned even more mutants than he had even made so far.

Personality Profile
He is shown to be really jealous of his twin brother Nereus, who their father chose to be crowned prince and People of Andros, the mermaids and the mermen, like better than him. So he finally decided to attack him. In jail, he met the Trix and became good friends with Icy, both of them seeming to understand and to have romantic interest with each other not to mention Icy seems so far to be the only one who Tritannus cares for. Tritannus also has a crush on icy and will do anything to help her, Icy will do the same.

Aisha described him as a "psycho", which has been proven to be true. He also is obsessed with taking revenge from his family, to such an extent that he was even willing to turn his own family into mutant monsters that serve him, and he even tried turning Aisha into a mutant.

He is really cruel, since he turned his own family into a mutant, and used Ligea and Nereus, turned into mutants, to attack Neptune and Tressa before turning them into mutants as well. He even used his mutated family as shield against the Winx, telling them that they will have to destroy his, and Aisha's, family before destroying him in their first battle in the Infinite Ocean.

Also he seems to be somewhat naive toward Icy and easily angered. He somewhat enjoys absorbing toxins to become an monster and when he decided to become even more powerful, he became completely with obsessed finding more oil or toxic chemicals.

He also growed a lot of confidence during the time, being able to immediatly attack any gatekeeper he chooses.

Triton
He looks identical to his twin brother, having long hair fair skin, a muscled body and long snake-like fish tail, but he has yellow eyes, a green dorsal fin and scales and darker purple hair. He has somewhat similar facials details as Valtor. He has a symbol in his head, 3 lines of 4 dots each line. This symbol was the reason why Aisha had recognize him in his Monster form.

Monster
In his monster form, he is larger than in his triton form. His upper body has a reptilian appearance, with red eyes, purple lips and green skin.

Trivia

 * Tritannus's name appears to come from a mix of Triton and Titan.
 * Triton is a Marine God of Greek Mythology who is the son of Poseidon, the God of the Sea (whose Roman equivalent is named Neptune), and his wife Amphitrite, the Nereid sea nymph and daughter of the Sea God Nereus. Triton is depicted as being half-man half-fish, the tritons are his descendants and, like him, are also half-human half-fish. One of Amphitrite's 49 sisters is named Galatea.
 * Titans are a race of primeval deities in Greek Mythology who are said to be immortal giants and who once used to rule the world until the God Zeus defeated them and proclaimed himself and his brothers and sisters as the new rulers of the world.
 * Tritannus may have been partly inspired from King Triton, the father of the mermaid Princess Ariel in the 1989 Disney film "The Little Mermaid" as they both have a trident as weapon.
 * His ability to drain toxic waste is similar how Valtor drained magic power from magic treasures and Ogron drained fairy magic.
 * Tritannus is similar to Valtor in the sense that they:
 * Both made sea creatures into his evil minions.
 * Both escaped with the Trix from prison.
 * Both gave the Trix a new witch form.
 * Icy fell in love with both of them.
 * Both are somehow related to a Winx.
 * Both first appeared in the show on Andros.
 * Both transformed into monsters.
 * Aisha was the first Winx Club fairy to hurt Tritannus in a fight. She did this by kicking him in the chin.
 * According to King Oritel and Queen Marion, Tritannus is the greatest and most dangerous threat to the Magical Dimension since the three Ancient Witches.