She wanted to find out who'd killed her best friend and how.
He cannot bring himself to kill his old friend, another human.
He must be brought to task for having killed her friend.
They killed my friend and now they're going to kill me!
He didn't want to have to kill his friend again.
Out there was the man who had killed his friends.
If you kill my friend that is what I will do.
That thing was going to kill me and my friend, but he got it first.
Perhaps there was another way to get the people without killing his new friend.
These people had killed a planet and her friends with it.