Complex sentence: They always have masks covering their faces; the only parts not covered are the eyes and mouth, which simply appear as black holes, some people would suggest that Shy Guys have no actual face, just a blank surface behind the mask.
Split into simpler sentences: They always have masks covering their faces; the only parts not covered are the eyes and mouth, which simply appear as black holes. Some people would suggest that Shy Guys have no actual face, just a blank surface behind the mask.