Sometimes, a character you care for is going to die. Rather than killed off by the bad guys or some cosmic whim, though, the murderer is another character who cares very much for the deceased. Perhaps your little sis has become a Tragic Monster and you have to stake them or maybe you have to Fight Your Friend to the death. Occasionally it's a case of Shoot the Dog or Mercy Kill. In any case, the characters know each other, as well as their relationship to each other. And the killer knows that the other has to die for anything to be resolved. In some cases leads to Cradling Your Kill.