Her clothes were the first line of defense against the flames devouring her luscious body but they didn't last very long. Her clothes looked like they seized to exist after coming into contact with the baleful fire. There was no smell of burning or ashy leftover of the clothes. The flame temperature was likely so high that even gases couldn't escape burning to oblivion.
It didn't take Luna very long to be in her birthday suit as all her clothes had been reduced to nothing in a matter of seconds. In place of her clothes, the glittering blue flames were draped around her in a fiery costume that made her look like a phoenix reborn in human form and kept her private parts away from the prying eyes of the others.