Evangelion Unit-04

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Evangelion Unit-04
Model Type Production
Pilot(s) Unknown
Soul(s) Unknown
First Sortie None


Evangelion Unit-04 (エヴァンゲリオン4号機, Evangerion Yongouki) is the fifth completed Evangelion and the third "Production Model" Evangelion. Eva-04 is one of the two units constructed in the United States. Nerv's second branch base (Nerv-2) was destroyed along with Eva-04 in Episode 17, when the Eva's S2 Engine failed upon activation. A Dirac Sea developed as a result, and enveloped the Second Branch. It is heavily implied that the failure of the S2 engine was the result of an accident, not sabotage. After this incident, the United States immediately shipped Eva-03 to Japan, leading to the events of Episode 18.



Although never seen on screen, GAINAX occasionally releases production art of the unit. It is depicted as being silver in color and physically identical to Eva-03. Like the other Production Models, it uses the same 5-plate torso armor design and shoulder mounted storage pylons. Its unique feature is its S² Engine, assumed to be a restored version of Shamshel's remains (which we see in Episode 05.)


Eva-04 had no designated pilot. A reasonable assumption to make is that one of the students from Class 2-A would have been the pilot, depending on the availability of an appropriate core. Alternatively, assuming that the technology had been improved sufficiently, Eva-04 might have been designated to be equipped with a Dummy Plug instead of a human pilot, much like the Mass Production Evangelions.

In spin-off materials, Kensuke Aida is the pilot of Eva-04.


The identity of the soul inside the core of Eva-04 is never specified in the original series, and it may never have had a soul inserted into it. However, if Kensuke Aida was indeed meant to be the pilot as spin-off materials suggest[1], the soul designated for Eva-04 would have been Kensuke's mother.


  1. Kensuke belongs to Class 2A and does not have a mother
Evangelions (general)
Failed Evangelion Prototypes | Simulation Bodies
Eva-00 | Eva-01 | Eva-02 | Eva-03 | Eva-04 | Mass Production Evangelions (Evas 05~13)
Rebuild of Evangelion: Mark.04 | Eva-05 | Mark.06 | Eva-08 | Mark.09 | Eva-13
Eva 8+2 | Mass Production Evangelions | Failures of Infinity
Other: Extracanonical Evas