I'm not going to address that specific chicken, she has been well covered by others. They are all individuals and can be different. Have you ever noticed when you have a gathering of people in a room that some people may be cold, some warm, and some very comfortable? Chickens are the same way.
Cold doesn't seem to bother my chickens that much. I leave the pop door open and let them decide when they want to go out. I've seen mine choose to go out when it was colder than 0 F (-18 C). Growing up on the farm I saw them walking around at -10 F (-23 C). If a cold wind is blowing they will not be out. Mine do not like a cold wind.
Snow can be an issue. Some don't have a problem with snow, some don't like it, especially at first. Most of mine eventually get used to it.
I leave my pop door open and let them decide what to do. They know more about being chickens and when they are comfortable than I ever will. Not all of them do exactly the same thing either, though they do tend to do things as a flock.