A mock
entry plug developed in order to activate and operate the
Evangelion without the
pilots. Although the personal pattern of the
Children is transplanted to the
plug,
digitisation of the soul is impossible, so the
dummy plug merely simulates
thought patterns. The dummy plugs prepared by
NERV used the personal pattern of the
First Children,
Rei Ayanami, whereas the dummy plugs prepared by
SEELE used the personal pattern of the
Fifth Children,
Kaoru Nagisa.
Source: The End of Evangelion : Glossary contained within The End of Evangelion - Theatrical Program.