Boreas: There would be no coat to steal as the cold does not bother me seeing as my powers give me complete control over the forces of winter.
Alpha: Yeah, Argonians aren't really bothered by the cold as much as other beings, what with being living wool sweaters and all, but I usually just like to wear a light jacket at least if only so that people don't get suspicious about why I'm running around subzero weather in just cargo shorts and a t-shirt. As for whether I'd be mad if someone stole it, it depends. I might let it slide if they genuinely needed it, or I'd buy them a much warmer coat myself if I have the time and money. (He suddenly shivers as a frosty breeze blows up on him.)
Boreas: Not bothered by the cold, eh?
Alpha: Well, your cold is different! It's super cold, not normal cold! You wintry windbag!
Takeru: Similar to the Alpacas, Ice dragons like myself aren't really bothered by the cold either.
Flare: As someone who is bothered by the cold, I'd be pretty fragging mad if someone swiped my coat or any of my other property for that matter! But thankfully, I've got fire powers, so it's not as big of a problem though.
Selena: We agree with Alpha Alpaca, it depends on the situation. We would probably happily give up our coat to those less fortunate to us. Although seeing as we are made out of water, we could possibly freeze into an ice sculpture ourselves if not careful! (Giggles to herself.)