[@Shurikai] Indeed. Initially, since their characters have been involved with other player's characters, I thought it would make more sense to keep them and kill them off logically so it wouldn't affect the other character's too much. But Strawberry is right, it would be taking his character away from him, and that would be wrong, regardless. I'm going to clear the ranks with their characters and those connected to them now. 

Just forgetting about their existence seems to be more logical and simple.