Sahaquiel

Sahaquiel is an "angel of the sky". He attacks NERV from above (episode 12).
The angel ,a huge living bomb, drops small fragments of its self on to the Earth, constantly correcting his aiming errors. Once he would have locked onto his target, he supposedly would drop his entire body to wipe out NERV.
Because he is so far away, he couldn't be attacked while in space, so Misato relies on a hazardous plan : All three EVA's should try to catch Sahaquiel before he hits ground. This plan sounds completely futile, but it works, mainly because of Unit-01.
In this episode, the AT-field, that is generated by the pilots and somehow amplified through EVA reveals some of it's true power.