Tenten and being the most easily forgotten about girl
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Least Important
All the other girls were special in some way. Team seven had Sakura, and she was Godaime-sama's pupil and had learned the Hokage's super-strength and incredible healing.
Team eight had a Hyuuga, enough said. Team ten had Ino, and she had her family jutsu, the ability to enter minds. They were unique and strong and useful. And for a while she had thought her own skills with weapons were useful too, but her mind was changed during the chuunin exams. She had been beaten humiliatingly easy by Temari of Sunagakure.
Her defeats, her weaknesses, they pushed her so much more.