In the comics, the walkers do evolve. They become more dangerous and develop new traits as the story progresses. This adds an extra layer of threat and keeps the plot interesting.
The White Walkers were a race of ice creatures in the world of 'Game of Thrones'. They were created by the Children of the Forest as a weapon against the First Men. They had blue eyes and could raise the dead. They were extremely powerful and cold, bringing a long winter wherever they went. Their leader was the Night King. They were a major threat to all living things south of the Wall.
The White Walkers were created by the Children of the Forest. Long ago, the First Men were encroaching on the lands of the Children. In an attempt to defend themselves, the Children of the Forest created the White Walkers using dark magic. They were made from captured humans and given powers over ice and cold. However, the White Walkers soon got out of control and became a great threat not only to the First Men but also to the Children of the Forest themselves.
Sure. In the comic books, the walkers do evolve. They become more aggressive, adapt to certain situations, and sometimes even show different physical traits.
Well, a variant edition comic is kind of like a unique take on a normal comic. It might have a limited print run, or it could showcase a different artist's interpretation of the cover or have some exclusive content inside. These are often sought after by collectors.