Quote: "Can I make something dissapear by destroying someone?"
Yes
You could settargetname=x then activatetarget in the characters destroy script before you destroy it.
An example would be the stock script destroyandactivate.fpi found in your scriptbank\destroy folder.
However, that script uses the activateifused=1 instead of setting the target, but it will work either way.
Then, the other entity that is being activated must be scripted to perform some action when activated, which in your case it would call its own destroy script when activated.