In that era when white teeth prevailed, Kakashi grew up in glory. After the death of White Tooth, Kakashi was deeply stimulated. From then on, he became ruthless, put on a mask and thought that "ninjas only need to complete tasks, only need rules, and do not need feelings." Faces don't need to be known to others, there is no need. " Later, I was changed my mind, and the mask was always worn and became a daily wear.

His face is behind the mask. - -

Finally, it is a mask, not a mask. The two are not the same thing.