Little Dragon Girl, as a martial artist, is best known for her hing gung. She never was a very powerful fighter, but her hing gung made her so quick and nimble that even Greats-level fighters had trouble with her (because she moved too fast for them to hit).
I don't know how it went down in the novel, but in ROCH '83 (TVB), Little Dragon Girl and Fok Do fought on several occassions. In each case, Fok Do was able to win because he was actually able to *outspeed* and *outquick* Little Dragon Girl. I didn't think anybody in ROCH was capable of doing that. Moreover (again in the series, not sure about the novel), the Golden Wheel Monk commented that whereas Dat Yee Ba was powerful, Fok Do was nimble and quick.
Was Fok Do really that quick? Could he actually "outquick" Little Dragon Girl early in the story?