Complex sentence: O-Ren Ishii wields a Shirasaya, an externally featureless katana, particularly lacking a tsuba (guard) and handle wrappings; and at first doesn't believe that Kiddo's katana is a true Hattori Hanzo original.
Split into simpler sentences: O-Ren Ishii wields a Shirasaya, an externally featureless katana, particularly lacking a tsuba (guard) and handle wrappings. When first seeing Kiddo's sword, she doesn't believe that it is a true Hattori Hanzo original.