After 4th boss/I just revisitedDuring the nighttime phase where the moon is out.the place where I fought Father G. and was attacked by a hunter. Thought that was strange and fought him but then a second hunter came and attacked me too so I ran. What's the deal with those guys?
One should be Eileen the Crow. If you didn't meet her in the sewers before hand then maybe she did attack you. I met her before that event, though, and was able to help her kill the hunter. I'm not sure what happens next in her quest line but apparently you can eventually get her armor.