Actually I was surprised at how friendly she was to Sakura. I can't remember the exact quote, but it seems she considers Sakura a friendly rival (saying something like, "That was fun. You can have a rematch anytime.") And she is Chun-li's partner in the game and the beginning and endings definitely imply that they enjoy working together. Chun-li even tells her at the end something like, "Don't worry...if more bad things happen *we'll* find a way to fix it." implying that they'll be working together in the future as needed.