Strider's Squad

A squad of stalkers from Monolith faction. The problem is: generally Monolithians shoot EVERYONE ELSE on sight and are more fanatical than Word Bearers.
Strider is not the case. He and his squad broke free from the brainwashing that guides the faction, lost their memories, and now just want to find some decent cover, which they would - if not for stalkers being a bit jumpy at the sight of Monolithians. If you can get decent relationship with Duty or Freedom, you can get them recruited into that faction. (I always recruited them into Duty for some reason).
If you did this, later on you can recruit Strider himself for a trip into Pripyat. He already has an isolated suit and a good sniper rifle. Later on he doesn't really appear, just slumping against the wall at the laundromat.
And also, his nickname can also be translated as "Stranger".