[It really isn't - and that becomes clear when one of the imps, inspecting the hem of her skirt, decides to see how flammable it is from up close, and it turns out that once again, Feel Invincible is letting her down (it only absorbs physical, non-elemental damage).
As the flames start eating up the garment, she lets out a startled yelp and instinctively shoves the imp away with her wind magic first and foremost - which only fuels the fire. Forcing herself to keep calm, she attempts to do what she told the Master Chief about and rob it of its oxygen, but that requires focus, and the imps, excited to see that at least one of these people does make for good kindling, eagerly try to set her blouse and hair on fire too. At least one of them, though, attacks the Master Chief - they don't need him interfering!]
CW: Semi-Immolation
As the flames start eating up the garment, she lets out a startled yelp and instinctively shoves the imp away with her wind magic first and foremost - which only fuels the fire. Forcing herself to keep calm, she attempts to do what she told the Master Chief about and rob it of its oxygen, but that requires focus, and the imps, excited to see that at least one of these people does make for good kindling, eagerly try to set her blouse and hair on fire too. At least one of them, though, attacks the Master Chief - they don't need him interfering!]