Rei Ayanami
Name: Rei Ayanami

Age: 14

Gender: Female

Occupation: Student and Evangelion pilot 

Rei is extremely timid, shy and at times almost seems withdrawn from the world around her.  She finds it incredibly hard to express her feelings towards others and as a consequence isn't the kind of person who makes friends that easily.  All of Rei's personnel records have been erased, she has no parents and there is no trail leading to her past, it would seem that her existence begins at a dead end.

She was the first child to be chosen to pilot an Eva, in particular EVA-00, in accordance with the Marduk institute.  Though unfortunately she was seriously injured during her first attempt to synchronise with her Eva when it mysteriously went out of control.  Fortunately Commander Ikari rescued her and she survived the accident, her next attempt at synchronisation was successful and she has now become the active pilot of EVA-00.  Whether or not this is by choice is unknown, Rei simply seems to do as she is told without complaining, something which Shinji is known for doing.

The truth is though, Rei is in fact not human, that is not entirely.  She is a by-product of the human instrumentality project, artificially created and implanted with the soul of Yui Ikari.  Rei has only one soul, however, NERV have created multiple bodies, or vessels, for Rei's soul in the event of her death.  Indeed Rei is killed twice, by both Naoko Akagi and the sixteenth Angel.
Rei Ayanami, the 'first child', seems the most mysterious of the Eva pilots. Unlike Shinji, she seems close to Ikari Gendo...and to no one else. She attends Tokyo-3 Municipal High School, but aside from Shinji and Asuka whom she works with, she has no friends there. Her responses to others around her seem emotionally blunted. Her expressions seem blank, whether she is dealing with Shinji's emotional problems or trying to shove an N-2 bomb through an AT field and up some angel's rear end. Her willingness to take orders shows when she has to serve as a shield for Shinji during the attack of the fifth angel, Ramiel. She verifies that she is to serve as the shield even if it costs her life, and her response indicates that she'll follow that order without hesitation, without even dwelling on the potential self-sacrifice. As the story develops throughout the series, it seems that Rei has been genetically engineered, created through the Human Instrumentality project. She was developed from DNA from Shinji's mother, a fact that is not revealed until near the end of the series. In fact, there was another Rei who predates the one in the series. But this first Rei dies as a child when she confronts her rival for Gendo's affections, Dr. Akagi (the developer of the Magi super-computer system), with a series of insults that Rei claims to have overheard Gendo saying about her. Dr. Akagi strangled this younger Rei in a fit of anger, and then leaped to her own death. This may explain why the replacement Rei is so emotionally blunted. It also explains why in episode 1, Rei had been injured while initially trying to learn how to control unit-00, because unit-00 had been infused with the essence of Dr. Akagi, and went berserk when Rei first tried to synchronize with it.