Nerv Department of Security Intelligence

The Nerv Department of Security Intelligence (also referred to popularly by some fans as "Section Two" or "Second Section") is the subsection of Nerv which contains the "Men in Black" agents who follow around Evangelion pilots and investigate security breaches. In Episode 04, they reacquire Shinji Ikari after he runs away for several days. They also confront Misato Katsuragi in Episode 21 when Kaji kidnaps Fuyutsuki, and also reacquire Asuka after she runs away in Episode 24.

It is implied that their allegiance is not entirely to Nerv, since they can be capable of incredible lapses of security when needed, such as allowing Fuyutsuki's kidnapping to take place and losing track of Asuka for a week and reacquiring her on the same day that Kaworu arrived as a replacement pilot. However, the exact scope of their involvement in events such as Kaji's murder (and possibly even the Episode 11 blackout and the JSSDF invasion in End of Evangelion) remains purely speculative.