It is an elemental from the planet Elyon.
It belongs to the class of fiery elements.
Fire elementals are very hot-tempered. But they are friendly and loyal, they are attached to their master and are very difficult to survive his loss.
Fire element can change the density, and color depending on the mood.
We can assume that they can burn their masters of people, but it's not. They burn only when they want, and if they get into trouble like self-defense.
Fire elementals live in fire sources. They can grow in size depending on the increase.