in Fire Force, adolla's flames are flames that exist...well in Adolla, and they are flames that can kill you if you touch them and you are not worthy of touching them, the interesting thing about these flames is that those who touch them can be burned instantly and they die, while later becoming part of the world of concepts (Adolla).
In fact, there doesn't even have to be a physical interaction, if you touch the flames even with your own mind (with an Adolla link) you can end up getting burned anyway.
