I'm not too sure about that. It can be done, but there's other things to worry about if the user can slash a major number of characters. If I allow characters to just poof out of existence, I'm going to need to worry about a sliding difficulty for the final boss. I'd need some time to think about it, but for now you have plenty of tools to already avoid characters you're not interested in through the Debug menu. Can 'Max All Relations' then fast travel to only the predators you're interested in. There is an option for Feral to go on/off, though it doesn't sound like it would apply for you here.