Originally I began to adjust the power of my stone cannon so that Eris could have experience fighting demons.
That experience allowed me to continue to adjust the power so that I wouldn't have to kill human opponents.
The reason was because of Rujerd.... the party of [Dead End] was a group that could not kill.
"At that time our party decided that we would not kill people. Because I was the leader I had to set a good example like that. Somehow I've continued on in that manner and it has become ingrained behavior.