Just because she was talking in a garbled way to no one I could see did not mean she would or could ever hurt me. The primary emotion in any psychotic episode is fear. Not at all. I'm saying that emotions are very complicated during psychosis. A severely mentally ill person who kills goes through exactly the same stages, unless the stress involved happens to trigger a psychotic episode.
Psychosis throws out all the rules.
Under psychotic conditions, the anger can be repressed, converted to fear, glee, or any other emotion, exaggerated into an overarching hatred for the whole universe, or you name it. In psychosis, your anger melds with what the trigger person did to you to initiate disorganized thinking. Then that thinking may or may not compell you to kill. If you do kill, you may well kill someone other than the trigger person. You probably won't kill at all.