EVA-01 TEST TYPE.
The first Eva
to be introduced to actual combat
, and the second Evangelion
built at NERV
HQ after Eva-00
. Although it plays a major role in many battles against Angels
, it also exhibits a number of unaccountable phenomena,
such as going berserk
, activating without an entry plug
inserted, and remaining active after its operational time limit, etc. In the battle against the 14th Angel
, it devoured the Angel and thus directly obtained an S² Engine
Purple in colour, its dedicated pilot is the Third Children - Shinji Ikari. It seems that the soul of his mother - Yui Ikari -- was made to dwell inside Eva-01. Also, the physical body of Eva-01 was apparently created from Lilith. This is why when the Lance of Longinus was lost, Eva-01 became the sole substitute for Lilith as the medium for Instrumentality (Human Complementation).
Source: The End of Evangelion : Glossary contained within The End of Evangelion - Theatrical Program.