Lunarians

Lunarians are a race of people from the Red Line capable of creating fire. The race is commonly thought to be extinct, with King as the only known survivor.

Appearance
The only known lunarian, King, is a towering humanoid who possesses a pair of large, black-feathered wings on his back. It is unknown whether his tall stature or his wings are lunarian traits.

Biology
Lunarians possess the ability to "ignite" (発火) their body and manipulate fire.

Trivia

 * Lunaria is Latin for "moon-like". In fiction, the term "lunarian" is sometimes used to describe inhabitants of the moon.