They resemble the mini dragons, with fish-like/dragon-like ears, horns, wings and sparks of fire at the tip of their tails. They have brown eyes and pink blushes. Each of them has a large hexagonal gemstone attached to their foreheads. Their colors are varied.
In "The Magic Stones," when the Winx are inside the MiniWorld of Precious Stones, the Winx meet Biff, a Clanky and a residence of the MiniWorld of Precious Stones. By trusting the fairies, Biff brings the Winx to the heart of the volcano. Thanks to its technomagic, Tecna manages to repair the diamond that feeds the volcano, but in doing so, she free the Vampire of Fire, opening its jaws, he attacks them. The fairies are able to defeat him with a special spell of Bloom and Elas. For his good deed, Elas is getting awarded a new horn, where it turned silver. Later, Biff thank the Winx for restoring the Pyros' Magic Fire and they bid farewell.