Svetlana Belikova: Best character in the movie.
Although her character was clearly inspired by "The Boss" from Metal Gear Solid 3.
She is still an awesome character that personified an aged/mature looking woman who is incredibly sexy/attractive but also has incredibly fighting skills and a very strong dignified personality.
During her fight scene with Ada, I was actually rooting for Svetlana to win.
Her character was just so appealing and attractive on many different levels than just her looks.
She has style and personality as well.
Definitely one of the best things about this movie.