Headcanon: Demons hate the cold. They can tolerate it at best and die from it at worst. Temperature tolerance depends on the power level and the biology of the demon in question.
From most to least:
Diavolo- he’s a fucking furnace by himself. Cold? He doesn’t know her
Satan, Belphegor- tolerance of the average human.
Mammon- if it’s not windy he can bear it
Barbatos,Lucifer- acts like a hot shit but actually uses the warming spell
Mephistopheles, Leviathan- French army in Russia, 1812
Asmodeus, Beelzebub- Put them in the cold and i’m calling the Devildom cops on you for a murder attempt
