Sunny doesn't really attempt to hurt someone, she just bulldozes. If she is intent on something, she will do anything to get it, sometimes in the process stomping on someone else.
We all have that one chicken that is nice but mean. They are nice to people, but mean to the others, or mean to people and nice to the others. You are never quite sure how you feel about them, but they do add something to the flock.
Personally, for me, that's Sunny. Buff Orpington pullet...