STELLA: She is a talkative student who often gets average or low grades, but always pulls through with the help from her friends. She tends to be spontaneous and dislikes extensive planning, but she is able to recognize when her help is needed. Stella is also infamous amongst the Alfea houses for blowing up a laboratory [trying to invent a new shade of pink] and being kept back a grade, thus she is a year older than all the other Winx Club fairies. She has the power of the Sun and the Moon because her mother represents the moon and her father the sun. She is the princess of the planet Solaria, her birthplace. Her pixie is Amore, the pixie of love. She is very energetic and emotional.

FLORA: is a very kind-hearted and sensitive girl with a passion for nature and life. Happy,and introverted,she is always a sweet, loyal friend, and doesn't believe in hurting others or the environment. She is extremely fond of plants and nature, and her room consequently resembles a greenhouse. She has the power of Nature, which allows her to use plants in her attacks and natural predators to exterminate pests. She comes from the planet Linphea, or was used to be known as the fifth moon of marigold. Her pixie is Chatta, the pixie of gossip.

MUSA: loves all forms of music. Although she tries to put up a tough front, isolate herself, and is often pessimistic, she is a loyal and caring friend. In spite of her laid-back nature, Musa has the best grades of the entire Winx Club except Tecna. She is pale, Asian in appearance, with blue-black pigtails and blue eyes. She has the power of Music, and she gets her energy from all kinds of music. She comes from the heart of Melody. Her pixie is Tune, the pixie of manners, who often gets on Musa's nerves since they are almost the exact opposite of each other's personalities.

TECNA: is always logical and rational, and initially had trouble expressing her emotions. She speaks in a technical and a matter-of-fact manner. She is extremely intelligent and strong in technology and mathematics and enjoys playing video games and dismantling stuff. She can act cold and rational at times, but always tries to do the right thing. She has the power of Technology and can control everything provided by Technology. She comes from the planet Zenith . Her pixie is Digit who has similar powers.

LAYLA: (In Italy she is called "Aisha") Layla is the Princess of Andros (in the italina version), but in the 4kid's dub, she is from the planet of Tides. She has a restless, rebellious, and wild nature. Layla is a good athlete, fighter, dancer, and wind-raider rider. She is also a feminist, and thus opposes Riven, a chauvinist. She has the power of Fluids, and has the ability to manipulate a pink fluid called "Morfix" to take on any form she chooses. She joins the Winx Club in season two and brings her pixie friends along with her. Her pixie is Piff, the pixie of sweet dreams, who quite frequently helps her with her troubling nightmares.

ICY: The leader and eldest of the trio, her name refers to her powers of ice. She is quite charismatic. She despises Stella and is most competitive with her in the first season. In the second she is more spiteful towards Bloom. She is the most powerful of the three and thinks she is the most beautiful. She has long, white hair tied up high on her head. She wears blue. In comparison to her sisters she is less aggressive than Stormy and a little lighter than Darcy; she has a proper balance of her power. She is the eldest of her sisters. She is followed around by a duck named Peppi(sp?)

Darcy: Darcy works with all forms of darkness, as her name suggests ("Darcy" meaning "Dark One"). She is the smartest of the Trix. She enjoys tormenting "pathetic pixies". In season one, she is most aggressive towards Musa because Musa loved Riven, who was Darcy's boyfriend in the first season. She has long, dark brown hair. She wears purple and interacts with boys more than all of her other sisters. In the first season, she used Riven to help defeat the Winx and later, abandoned him. Therefore, she plays a very important role in the first season. She is less aggressive than her sisters (especially Stormy). She is also rewarded as the most beautiful by her fans.

Stormy: The youngest of the trio, her powers involve wind, storms, and weather. She has the shortest temper of the group and is prone to violent outbursts. She is most aggressive towards Musa in season 2. She has purple, short curly and quite frizzy hair that looks like a storm has been through it. She often doesn't think before she does something. She secretly believes she is more powerful than her older sisters Darcy and Icy. She wears hot pink/dark purple. She looks quite hitty due to her hairstyle. She is the most aggressive sister of the trio.

• SKY:The prince of Eraklyon, he feels stifled by his position.
• BRANDON: Sky's squire, a great swordsman and ladies' man.
• TIMMY: He acts as the geek of the group sometimes, from a long line of scientists. He has short ginger hair. He is Tecna's boyfriend. He is shy, sweet, and smart.
• RIVEN: A lone wolf, very competitive and good at sports. He has short spiked dark pink hair. He is a chauvinist; he and Layla, a feminist, are in opposition. He is Musa's boyfriend.
• HELIA: An artistic student, he is a great pilot and a pacifist. His grandfather, Saladin, is the Headmaster of Redfountain[2]. He has long blue hair tied into a loose ponytail. He is also very romantic and shy about directly speaking about his feelings. He is very good at laser string glove and tries to help everyone with it. He is Flora's boyfriend. He was the top student in Redfountain[2] until he decided to quit and dedicate his life to nature and poetry. He has rejoined Redfountain[2] now.