Amy is the reincarnation of the Princess of Mercury, and transforms into the Brilliant Fighter, Sailor Mercury.  Amy is the brain behind the Sailor Scouts and thus was given a pocket computer and virtual reality (VR) visor by Luna to enhance her natural talents.   Although Amy is naturally intelligent, she must study very hard to maintain her near-perfect grades in school, and her position as the best student in Japan.  Amy transferred to grade eight at Crossroads Junior Hight (Serena's school) from the "brain farm", Brighton Academy, and frequently attends attitional schooling in the evenings at the "Alabert Einstein School for the Gifted" (referred to as juku in Japan).  Amy once turned down an opportunity to study abroad in Germany, in order to stay with her Sailor friends.  Amy wears eyeglasses while reading, has an uncanny talent for video games, and has great affection for the third Rainbow Crystal carrier, Greg.  Amy understands better than anyone that Serena is not just Sailor Moon, but a young and emotional teenage girl.

     Amy's mother (a pediatrician) and fater (an artist) are separated.  She lives with her mother in Azabu Juuban and hopes to follow in her footsteps by also becoming a doctor.

     Also if you notice, she is the only one who has the defensive style in fighting. But that doesn't mean that she is useless. There must be at least someone to use support attack to make the enemy become vulnerable and confused, right ? And there should be someone to use a mini computer and visor to analyze the enemy too. And that is Mercury's job.

Transformations
Mercury power (first appeared in Episode #5.  Requires Mercury Transformation Pen.)
Mercury star power (appeared in Ep #56. Needs Mercury upgraded Transformation Pen)
Mercury crystal power

Attacks
Mercury Bubbles Blast  - first appeared in episode #5
Support attack, usually used before the others start attacking. The bubbles can do one of three things: cover the entire area with a thick fog, reduce the temperature to distract the enemy, or cause flying objects to fall to the ground.

Items of Power

Mercury Transformation Pen - first appeared in Episode #5, upgraded in ep #56
Luan gave Amy this item which transformed her into Sailor Mercury.  However, the pen can also function as a focus for the Sailor Scouts' personal energies, helping them combat or defend against the negative energies by a sheer act of will.  For example, Amy uses the pen to help prevent a dark portal to the Negaverse from closing so Sailor Moon and Sailor Mars would have enough time to escape back to Earth (Episode #39).

Minature Super Computer and VR Goggles - first appeared in Episode #6
Luna gives Amy the mini-computer and VR Goggles for the benefit of all the Sailor Scouts.  The two items are connected in function, but can be used seperatley as well.  The computer is mainly used for calculation and strategy, while the goggles can reveal other important information to Sailor Mercury, such as the weaknesses and true identities of her enemies, and the nearest escape route from buildings.  Sailor Mercury carries the computer with her at all times, while the goggles are activated when she presses on her earring.

Pocket Communicator - First appeared in Episode #14
The pocket communicator is given to the scouts by Luna to help them alert each other to danger more quickly.  The communications are not magical, but hight-tech devices with both audio and visual components.

Wrist Communicator - First appeared in Episode #56
This is an upgrade version of the Pocket Communicator that is worn on the wrist like a watch.