Ami

was an Academy Student from Konohagakure. She appears during a flashback to Ino Yamanaka and Sakura Haruno's time in the Ninja Academy. During a kunichi lesson she taunts Sakura about her forehead, prompting Ino to throw a flower (that she claims is poisonous) into Ami's open mouth. Ami quickly runs away to tell their teacher, Namida Suzume. She has purple hair in a style similar to that of Karin.

Source

 * First Databook, page 138