Ami Mizuno

 

Ami is a genius with a rumored IQ of 300. She studies all the time, and in S she is rather obsessed with getting everyone to study for the entrance exams, Japanese students must take to enter high school. She always brings a book everywhere to study, even to concerts and stuff. She has problems with love letters, and in the SuperS movie special ("Ami-chan's First Love") when she gets one, she breaks out into hives.

She first transfers to Juuban Junior High School and joins a cramming computer class, which is really a plot of the Dark Kingdom. Unfortunately for her, the teacher takes a liking to her. In other words she's basically a victim of a crazed youma. Fortunately Usagi rescues her, though actually Usagi comes to punish her for working with the Dark Kingdom, and then Ami does some rescuing herself when Luna throws her henshin stick at her, and she becomes Sailor Mercury.

Her family is extremely rich. Ami lives with her mother in an expensive apartment complex since her parents are divorced. Her mother is a busy doctor, whom Ami admires deeply (she wants to be a doctor like her mom when she grows up), and her father is a traveling painter. Gradually throughout the series, she becomes less introverted and more interested in things outside the realm of school and studying; in SailorStars, idol chasing is a trait that she manages to pick up.