Well... I'm no chicken expert (unless you're talking about eating them.)
We did have chickens when I was a kid. I don't recall that the hens would have ever attacked anyone. The roosters could become a bit feisty. There was one I recall that took a particular dislike to me. But I would have to admit the chances are I probably provoked him to begin with. I would think, if you can have some chicken feed to throw down for the chickens you want to be friends with, they'll become your best friends in no time at all. Good luck!