Here's the second draft of Stiletto's character bio - taken from the second draft of Wing Commander V (later Prophecy). As you can see, very little has changed - unlike Dane (who became Casey) and Maestro (who lost his wife).
2ND LIEUTENANT JEAN TALVERT (CALLSIGN: STILETTO)
Wingman. Early twenties. Athletic. Strikingly attractive. Also ambitious, driven, and just a bit subborn. Stiletto is a superb pilot and, though more by-the-book than Casey or Maestro, she's not above taking some serious chances.
Stiletto's feelings toward Casey are complex, to say the least. She thinks he is unnecessarily foolhardy; often a danger to himself and those around him. But she also knows he's the only pilot on the Midway who might give her a run for the title of "best." As a result, Stiletto is always competing with Casey; always on the lookout for a way to top him.
Additionally, though Stiletto would never admit it, she is more than a little attracted to Casey. When the two of them interact, sparks fly.