Ami's parents divorced when she was young, and she lives with her mother, who's a doctor. Her father is a travelling painter and often sends copies of his work. Ami attends a special study school in addition to regular school. She is an outcast at school since she's so smart. Ami always remained secluded from other kids until she met Usagi, who welcomed her and became her friend. Luna was suspicious of Ami at first, even thinking her to be a Dark Kingdom agent. Ami's cram school turned out to be a Dark Kingdom plot, and it was there that she was revealed to be a Senshi.
In both the anime and the manga, Ami is a study freak, and spends a lot of her time reading, even when on trips with her friends. She is quiet and shy, and sometimes says rather embarrassing things without meaning to. She is the brains of the Inner Senshi. She hates getting love letters. She loves to swim. She is very touchy about her grades; she gets upset when she doesn't score perfectly, and seems very startled and upset to see that Taiki managed to place higher than her.
In the anime, Ami has a short-term boyfriend named Urawa, who's only in two episodes. She doesn't seem very competitive unless pushed to be; she doesn't race all out against Michiru at first, but when she loses after not trying as hard as she can, Michiru prods her to go all out at they tie.
In the manga, she breaks out in hives when she receives a love letter (!). She doesn't seem so... blah, as she does in the anime. She is humorous at times, and has a more solid personality.
Ami has short hair, which is a very cerulean blue in the manga but looks darker in the anime. Her eyes are also cerulean blue. She usually wears small studs for earrings. When she isn't in her school uniform, she dresses conservatively.
As Mercury, her powers are based on ice and fresh water; her weapon is a harp. Her fuku is blue (almost a turquoisey color in the manga) with pale blue bows. She wears knee-length blue boots with a triangular top trimmed in white. She has three thin stripes on her collar.
*yawns* Let's just say, Mercury really bores me. There's not much to say about her that's all that interesting. She's there... that's about it. She's alright in the manga. I used to hate her, but now she's just a minor annoyance. Ah well.
Senshi Name: Sailormercury