Board Thread:General Discussion/@comment-96.239.132.70-20130913035220/@comment-15657817-20130923200408

Makes sense, KyoAni has a tendency to use similar looking designs for certain characters. Or make a character look like a hybrid of two other characters. It's mainly the similarity in the art style, or one part of the art style, as said before, for example, the eyes, the hair, the overall appearance.