SD3 was a great game for its time. She was my lead on my first playthrough, and she's still captain of my favorite combo (amazon/sprite/ thief).
Oh I agree, she was actually my lead on my first playthrough as well (I never finished my second playthrough though).
But she never became a recurring character and the game's "here are 6 characters, pick 3" design meant there were inevitably players who never picked her. (I want a PROPER Seiken Densetsu sequel!)