I did not knew too much about them, because things changed so suddenly, and I faced this situation (with so many parasites in the same time) first in my life.
Very first, I wanted to communicate with them (I was always curious towards spirits, even the aggressive ones, I tried to understand all of them), find a way to doing it well, but when I did some researches, I found Pazuzu’s name somehow, and then a wild ride started (I wrote about here).
I was curious to what kind of entites hanged on me, but got no time to find out, because when Pazuzu arrived, all of them vanished ~3-4 days before my first communication with Him. So I can clearly sense the changes around me.