What is this trope?

Characters that get a full blast of fire are never scorched or lose clothing etc and they have no burn marks

Eg In Naruto,Sasuke burned through a chain of Naruto's shadow clones with his dragon flame jutsu(Katōn: Ryūka no Jutsu)the real Naruto got the full blast of the fire but had no burn marks on him.

Orochimaru also got a point blank burn from Sasuke, but it didn't even scorch him.