Mia and I

• Mia is the main character, who now combines saving Centopia with responsible work in an animal clinic on Earth.
• Prince Mo and Yuko are loyal elf warriors who, along with Mia, embark on a dangerous journey beyond the familiar borders of Centopia in search of life-saving ingredients.
• Oncho and Kiara are grown-up winged unicorns (alicorns), whose magic of light and golden horn is still needed to protect the magical land.
• Fuddle is an eccentric little faun who keeps annoying the elves, but at the same time creates new ingenious gadgets for their mission.
• Gargona is the main villain, remaining at the helm of the dark forces after past defeats. This season, she leads a desperate race against the elves, trying to prevent them from brewing the Unity Potion.
• Rixel, Daxon, and the Dragon Lord are a trio of villains from past seasons from Dystopia who are up to no good again as their evil castle is on the move.
• Grandfather Renzo - continues to appear in Mia's real life, remaining her main family support.

New characters in season 4
Residents of Centopia
• Riok is a noble, courageous, and handsome guardian elf who joins the protagonists on their journey. He helps Miya, Yuko, and Moe search for hidden ingredients for the Unity Potion, and with his intimate knowledge of the hidden corners of Centopia, becomes a valuable ally.
• Lilo is an elf who helps the heroes in their missions in the new, reunited territories of the continent.

Magical creatures
• Stormy is a legendary and majestic thunder unicorn. He possesses a unique gift—the ability to speak and communicate with all animals. Stormy plays a key role in uniting the forces of nature against the darkness.

People from the real world
In season four, Mia changes her surroundings and tries out a new role on Earth—she becomes a veterinarian's assistant. This brings with it the introduction of several new human characters:
• Pieter is the kind local veterinarian who employs Mia as an assistant. He teaches her how to care for a variety of animals.
• Mattis and Carina are Mia's new acquaintances in the real world, teenagers involved in caring for animals and helping out at the veterinary clinic.
• Hector and Lucas are new characters from Mia's environment on Earth, who create dynamics in her "human" life during her workdays.

People from the real world
• Sarah is Mia's new friend on Earth. Blind from birth, she lives next door to Renzo's farm. She is incredibly talented at horseback riding and has a strong character. This season, she accidentally ends up in Centopia with Mia, where her vision is temporarily restored and she turns into an elf.
• Luciana is Sarah’s caring and kind mother, who is initially very worried about her daughter’s hobbies.
• Fabio is Mario's cousin, a cheerful guy who appears temporarily on the farm.

Familiar characters in new roles
• Mia – continues to protect Centopia, now alongside Sarah. In the real world, she teaches Sarah how to ride horses and adapt to life outside the city.
• Sarah (as an elf) - In Centopia, Sarah gains the ability to see. She becomes a loyal ally of the elves and gains the ability to communicate with fauns.
• Prince Mo and Yuko are loyal protectors of the kingdom. Their romance continues to develop despite constant battles with Daxon.
• Oncho and Ono, a golden alicorn, and his father, the Unicorn King, actively help the elves collect the elements of the Crystal Heart to cleanse Centopia of dark magic.
• Gargona is an old villainess who is forced to share power and compete with Daxon for the favor of the Dragon Lord.
• Fuddle is an eccentric faun whose new inventions (including an upgrade to Troubatus) once again prove crucial in the fight against villains.
• Violetta (Varia) - after the events of the second season, she has reformed and is now sincerely friends with Mia, helping her in the real world.
• Grandfather Renzo and Mario - continue to develop the farm in Italy and support Mia on Earth.

New characters in season 3
Residents of Centopia
• Lord Dragon (Lord Draco) - This season he finally appears in person as the main antagonist, having regained his body and powers. Lord of the dark elves of Dystopia.
• Daxson is the cunning and wily leader of the Dravel beetles, who comes to the aid of Gargone on the orders of the Dragon Lord. He has immense strength, despises flowers, and is the main executor of the evil plans of the season.
• Dravels are the new soldiers of the dark forces. Insect-like creatures that can fly and obey Daxon unquestioningly.
• Igi is Daxon's loyal pet, a poisonous chameleon whose venom is used to create a hypnotic elixir.
• The King of the Fauns (Pobani) is the wise ruler of all the fauns of Centopia, to whom the heroes turn for help.
• Kuki is a small, cute, and incredibly fast elf who helps Mia and her friends.

New Unicorns
• Star Unicorn (Signor Vitreo) - a majestic unicorn with a crystal horn.
• Moon Unicorn (Selena) is a magical unicorn of the night with a silver horn.
• Solar Unicorn (Helios) - a shining unicorn whose magic is associated with warmth and light.
• Rainbow Unicorn is the legendary guardian of Rainbow Island, possessing incredible power.

Real World People (Grandpa Renzo's Farm)
• Renzo Genovese is Mia's kind, cheerful, and wise grandfather. He owns a country farm in Italy, where Mia spends her summer holidays. He faces financial difficulties and the threat of losing the farm.
• Mario is a young, hardworking man who helps Renzo with the farm. He develops a romantic interest in Mia and, over time, accidentally discovers her secret about Centopia, becoming her ally on Earth.
• Rocco is Grandpa Renzo's arrogant rival, a professional horseman who is trying to buy back the farm's debts.
• Countess Di Noto is Violetta's arrogant mother, who wants to buy out Renzo's lands and get rid of Sapphire.
• Saphir is Violetta's purebred but unruly horse. He was about to be slaughtered because of his unruly nature, but Mia, Mario, and Renzo save him.
• Mimi is an adorable little kitten that Grandpa Renzo gives to Mia when he arrives at the farm.

Familiar characters in new roles
• Mia continues to travel between worlds. In the real world, she saves her grandfather's farm, and in Centopia, she searches for a way to defeat Rixel.
• Violetta/Varia is the main plot point of the season. After accidentally finding a fragment of Mia's magic bracelet, Violetta infiltrates Centopia and takes the guise of an elf named Varia. At first, she spies for Rixel and harms Mia out of envy, but over time, her character changes for the better.
• Prince Mo and Yuko are Mia's loyal friends who help her confront a new threat. Romantic feelings, fueled by jealousy, begin to develop between them.
• Oncho is a fully grown golden alicorn. This season, his magic becomes key to saving his father, Ono.
• Gargona is a villain from Season 1. After Panthea's defeat, she joins forces with Rixel in hopes of regaining the Dragon Lord's trust.
• Fuddle is a talkative faun who keeps creating crazy inventions.

New characters in season 2
Residents of Centopia
• Simo is a young wood elf and a master flute player. He lives in the mysterious Black Forest with his mother, Tessandra. He becomes close friends with Mia and Yuko, causing Prince Mo to be deeply jealous.
• Tessandra is an elven healer and Simo's wise mother. She helps the heroes and gives them advice on how to save Oncho's father.
• Xolana, Shiva, and Lasita are a trio of young and very flirtatious elves. They are all in love with Prince Mo and constantly try to attract his attention, much to the annoyance of Yuko.

Magical Creatures and Unicorns
• Ono is the legendary Unicorn King, Oncho's father, and Lyria's husband. The main goal of the season is to collect the four golden rings of his crown to open Rainbow Island and rescue him from captivity.
• Elemental Unicorns of Protection (Balanda, Zato and Yolika) - three powerful unicorns of nature that guard the Black Forest.
• Baby Blue is a cute little blue dragon that the main characters save.

New villains
• Rixel is the main antagonist of the season. The devious and greedy director of the floating circus "Zootopia," who arrived in Centopia on his flying ship. He made a deal with the dark elf lord, Lord Dragon, and is trying to capture the winged Oncho and his father, Ono.
• Gorga is a wingless, fire-breathing dinodragon that Rixel rides on. She is hypnotized by Rixel and breathes out evil little fire creatures called gongos. By the end of the season, she is freed from the evil spell.
• The Dragon Lord is the ruler of the Dark Elves of Dystopia and the main puppeteer who gives orders to Rixel.
Real World People (Grandpa Renzo's Farm)

The Real World (School in Florence)
• Mia Marconi (in the real world) is an ordinary teenage girl who lost her parents in a car accident and was admitted to a prestigious Italian boarding school.
• Vincent is Mia's classmate, a kind and smart guy. He was the first person Mia confided in about the existence of Centopia. He helps her decipher the predictions in the book.
• Pola is Mia's roommate. Initially, she was friends with Violetta and was wary of Mia, but later became her faithful friend.
• Violetta Di Noto is Mia's main rival at school. A spoiled, arrogant, and popular girl from a wealthy family, she constantly tries to annoy Mia and find out her secrets.

Residents of Centopia

Elves
• Mia (in Centopia) is an elf with pink wings and crimson hair. Her main unique ability is that she can understand and speak with unicorns, as well as read ancient runes.
• Prince Mo is the son of King Raynor and Queen Mayla. He is brave, wise, and an excellent warrior. In the first season, he is secretly in love with Mia.
• Yuko is Mo's best friend and one of the kingdom's strongest warriors. She is responsible for collecting unicorn tears and often competes with Mo, demonstrating her fighting skills.
• King Raynor and Queen Myla are the rulers of the elves of Centopia. Wise mentors who lead the defense against the evil Panthea.

Unicorns
• Lyria is a beautiful unicorn whom Mia befriended on her very first day. Oncho's mother.
• Oncho is a unique golden alicorn (winged unicorn) born in Season 1. His golden horn possesses incredible magic: he can revive plants and search for parts of Trubatus.
• Ono is the lord of the unicorns, Oncho's father and Lyria's husband. He was captured by Panthea long before the main events.

Fauns and other creatures
• Fuddle is a funny, clumsy, and talkative little faun. He invented the Trumpetus, a musical instrument whose sound can destroy evil Munculi.
• Politeus is a mysterious snake-man merchant who lives in a cave. He collects rare items and often helps heroes, although he always seeks profit in everything.

Villains
• Panthea is the main villain of the first season, the evil queen of the Munculi. She wears a mask to hide her old age and hunts for unicorn horns, as their magic restores her youth.
• Gargona is Panthea's main assistant, commander of the Munculus army.
• Munculi - dark, soulless warriors in the service of Panthea, who ride on flying snakes (dragons). They are terrified of the sounds of the Troubatus.