Ami Mizuno was the present incarnation of Sailor Mercury, and appeared in all versions of Sailor Moon. Ami was a shy girl who did not make friends easily, preferring to be alone with her books instead. Her classmates mistook her withdrawn nature for arrogance, so they did not approach her either until Usagi started doing so. She studied very hard and regularly finished at the top of national exams, leading her classmates to speculate that she was superhuman and had an IQ of 300. Math and science were her favorite subjects, and she was aiming to become a doctor like her mother. Usually calm and level-headed, she was the voice of reason of the Senshi team. The others often relied on her plans and analyses, but they often thought she should "loosen up" more.