This is the bad brother. The one that eats people. He’s blue. Snow precedes him wherever he goes.
In the King Roach story they are ancient avatars of winter and summer who have gained physical form. King Roach teams with the summer (good) brother to defeat the winter (bad) brother.
Thus is born Global Warming. When it’s summer all the time. Yay!
That would be a problem wouldn’t it.
Isn’t always summer in faerieland? Maybe this whole Global Warming thing is a plot by the elves.