[[All Eevees on the screen say hello, almost in unison.]]

Actually it isn't! Jolteon has the capability of sharpening it's fur if it wishes by charging it with electricity. However, if it becomes startled or angry, it will do this naturally so you will want to be mindful of that while holding her and the like. Similarly, Glaceon can do the same. Only the method of sharpening their fur is by freezing the strands of fur.