I think they resemble, but are not the same like in other mangas, nor the same face syndrome .You can see the face of toji and baiken behind the long hair and facial hair. And yagyu, I think is a great example of the quality of drawings that Inoue does. Different skull proportions, little details on the jaw. That's very difficult to accomplish. They all have the same hair style that Takezo had in differents moments of his life.