Zark

Zark is a Children of the Cathedral thug in 2161.

Background
Zark refers to peace and the Unity as 'bullshit', and seems to understand the corruption that the Children really stand for.

Other interactions
Zark stands in front of the Cathedral. With proper convincing he will help you take down the Nightkin, although he is a rather weak ally.

Appearances
Zark appears only in Fallout.