These delightful young ladies are sisters who share a love of theatre, Japanese Anime, art and (of course) bladed weaponry. Yin (the blonde) is working on her career in theatre and is also an anesthesiologist, so she really is a knock out. Her sister, Yang, is a budding graphics artist in her own right and can be found at most of the bigger Anime cons about the nation.
They are also the BladeMaster's nieces. So be nice... very nice.