The Great Dragon looks like a reptilian creature with a long serpentine body. It has only a pair of forelimbs in the Cinélume dub but in the Nickelodeon Specials and as from Season 5, it is seen with a pair of forelimbs and a pair of hind limbs. It possesses mustache-like tendrils above each nose and eyes and there are horn-like projections on its lover jaw. On each side of its head is a large triangular horn-like frill.
The Great Dragon's color is orange with a yellow aura around it, which gives its body a fiery lava-like look.
Back in the beginning of time, a dazzling light gave birth to the Great Dragon. It is an ancient creature, which was said to have fiery breath. This breath sparked the Dragon Fire (or Dragon Flame, Great Sacred Fire) that gave life to the whole Magic Dimension eons ago, spreading life, light and heat across the universe. Eventually, the dragon became exhausted and chose to rest on a realm called Domino, which made it the most beautiful and harmonious world of all. Its mighty energy was later handed down to the royal family. Later in the series, the creature's history was further explored. In the second season, it is said that the Shadow Phoenix, Lord Darkar (whose power is called the Shadow Fire in the 4Kids continuity), was created along with the Dragon at the same time. The said creature had the opposite power the Dragon has. It can absorb energy instead of giving life. The next season also tells that it has an elemental opposite: Water Stars that has the ability to extinguish the Dragon Fire and vice versa. According to Tecna, the Dragon can be a symbol of Good against Evil.
The Great Dragon's power is called the Dragon Flame, which is also the source of Bloom's powers. It is the power from which the whole Magic Dimension and all magic was created and is said to be limitless. It cannot be extinguished except with the water stars. The full powers of the Dragon Flame have however not been seen in the show.
The only known users of the Dragon Flame are:
- Daphne (16 years before the events of Season 1).
- The rest of the Winx members (Bloomix transformation in Season 6)
- The Trix (absorbing Bloom's power in Season 1)
According to Faragonda, the Great Dragon was born at the beginning of Time from the dark Void as a dazzling light and created the whole Magic Dimension with its fiery breath, where it spread life, light and heat.
Later it became exhausted and chose its resting place on the planet Domino. Since then the royal heirs of the royal family of Domino have been the Guardians of the Dragon Fire, the present Guardian being Bloom.Bloom does research in the library at Alfea, she finds in the books there that after the Dragon disappeared, the Magic Dimension was consecutively ruled by the nine Nymphs of Magix, all-powerful fairies who had controlled the destiny of the Magic Dimension and had been the previous Guardians of the Dragon's Fire (possibly implying that they were her ancestors), the last being Daphne, (Bloom's elder sister, even if she did not know it then).
When Lord Darkar tried to gain control of the Ultimate power, he sent his servants, the Ancestral Witches and Valtor, to claim the Dragon Fire from Domino, therefore causing the planet's destruction. When all the inhabitants of Domino disappeared in the final battle between the Company of Light and the Ancestral Witches, the whole Magic Dimension thought that the Dragon's Flame had been extinguished, until the Trix stole it from Bloom and revealed to her that it was still burning inside her, since she was its Guardian. This was confirmed when Bloom openly used the Dragon's Flame in the final battle against the Trix.
It is revealed that when the Great Dragon created the Universe, a small part of its Fire mixed with the Darkness, creating a kind of Dark Dragon's Fire which the Ancestral Witches found and fashioned into a man they raised as if he were their own son and named him Valtor.
It is possible that the part of Darkness which mixed with the Dragon Fire from which Valtor was created was in fact a small piece of Darkar's darkness, since it was stated that both the Shadow Phoenix (Lord Darkar) and the Great Dragon both were born in the original Void before the beginning of Time, which possibly means that they were born together at the same time, since in the first episode of the second season, Professor Wizgiz said, that in the Magic Dimension everything and every magic power has an opposite, also implying that opposite powers are created together.
- The appearance of the Great Dragon is similar to those of Chinese Dragons.
- According to Icy, the Beast of the Depths is the only thing in the Magic Dimension that is more powerful than the Dragon's Flame and since the Great Dragon's powers are the Dragon's Flame, the Beast of the Depths is more powerful than the Great Dragon. There are a lot of things that are more powerful, like the Ultimate Power that is located in the dimension of Relix (which is a separate dimension from the Magic Dimension and it was not created by the Great Dragon since it is a different dimension).