Eva-00 Prototype Unit.
The very first Evangelion
built at NERV
HQ. It was originally orange
and lacking shoulder units
, however after sustaining extreme damage in Evangelion Episode 06
it was upgraded to operational status, had shoulder units added, and painted blue
Eva-00's dedicated pilot is the First Children - Rei Ayanami. The soul that dwells within Eva-00 is something of a mystery. Eva-01's soul is that of Yui Ikari, Shinji Ikari's (Eva-01's pilot's) mother. Likewise Eva-02's soul is that of Sohryu Kyouko Zeppelin, Asuka Langley Sohryu's (Eva-02's pilot's) mother. Rei is special, she is without a mother in the normal sense, and thus determining whose soul is within Eva-00 is difficult. Like many things in Neon Genesis Evangelion there is no correct answer to this mystery. One theory that has been proven to be false is that Eva-00's soul belongs to Naoko Akagi, Ristuko Akagi's mother.
Eva-00 was destroyed, along with the second incarnation of Rei, in Evangelion Episode 23. Rei reversed Eva-00's A. T. Field and drew the 16th Angel to her in an effort to save Shinji and Eva-01. She then self-destructed Eva-00, destroying herself, Eva-00, the 16th Angel and much of Tokyo-3.