Kyunghun Jung was kind enough to point out a few errors I made, the worst of which was substituting "Japanese" for "Hong Kong" in the review. That's already fixed.
He also said it appears the subtitles are misleading toward the relationship between Maria and Brother. They are actually not related and instead are students of the Master.
Some final facts he provided:
Maria is Sally Yeh (the Killer, with Chow Yun-Fat)
Whisky is played by Tsui Hark. He has been involved in a number of excellent films, <A HREF="http://us.imdb.com/Name?Tsui,+Hark
">just look at his IMDB profile.</A>
Oh, to have a proofreader with such skills!