This papercraft is the Evangelion Unit-04 (EVA-04), based on the Manga / Anime / Film series Neon Genesis Evangelion, the paper craft is created by rexxkentrix. Evangelion Unit-04 was never completed, and was a test subject for the S² Engine. The Engine caused the destruction of 04, with the main theory being an opening in the Dirac Sea.
In Evangelion 2.0, Unit 04 is not seen but the event that lead to its apparent destruction is shown as a massive explosion of lower dimensions than that of the Second Impact but still quite massive, revealing a large energy cross rising from the sky to outer space. In "Battle Orchestra", Unit 04 is piloted by Kensuke Aida.
In an official Evangelion pachinko machine in Japan, once the player reach a certain level, there is a short animation featuring Unit-04. The scene shows Ramiel during an attack on Tokyo-3. When it destroys some missile launching sites, Unit-04 suddenly appears floating over a hill, with Kaworu Nagisa controlling it by floating in front of its head. Ramiel fires, but Kaworu's AT Field protects Unit-04. The EVA then charges forward with the Lance of Longinus. Ramiel reshapes itself and fires again, but Unit-04 blocks the attack with a scaled-up riot shield. After Ramiel stops its attack, Unit-04 hurls the Lance of Longinus at the Angel, which penetrates its Field, and destroys it in this single shot.
You can download the Evangelion paper craft model here: Neon Genesis Evangelion - Evangelion Unit-04 (EVA-04) Free Papercraft Download