Ami is one of the smartest student in her school. She's also very sweet, and a little shy at times. She is very studious. When Amy first transfers to the school, she has a little trouble fitting in, but she and Serena become fast friends. She discovers she is Sailor Mercury when Luna gives her a transformation pen. Amy lives in a mansion with her mother, who is a doctor. She is in her second year in Junior High, Class 5. In the original Japanese, Amy goes to Juuban J.H. in Minato-Ku, but in the North America dubbing, Amy goes to Crossroads J.H. She works very hard at her school work. Sailor Mercury is the brains of the Sailor Senshi. She uses her mini super computer and her VR Visor to find the weaknesses of the monsters that the Sailor Senshi encounter. She was once told she had a 300 IQ.