Mercury conjunct Pluto
This aspect produces penetrating and resourceful minds. The natives have the ability to see through others and to ferret out secrets. They are determined to get to the bottom of what they wish to understand. A strong willpower combines with real genius and resourcefulness. This aspect tends to make the native disinterested, and able to see things as they really are. To her, truth is more important than comfort. (Well, THAT certainly doesn’t sound like Katy, but as I said, she may “season” with age).
There is a special aptitude for understanding reality in terms of energy rather than in terms of material objects; therefore, the native is able to comprehend the forces that can generate fundamental changes in his environment.
Interest in science, especially in atomic physics, is indicated. The aspect also shows that the natives make good investigators and detectives, since much of their mental work is concerned with secret information. (An investigative reporter? I wonder what she has ferreted out about Keith?)
There can be a definite interest in the occult and in working with the superphysical forces of nature, inasmuch as people with this conjunction study and communicate about these forces. When the conjunction is afflicted, (both Mercury and Pluto square the ascendant, a “malefic” aspect.) these natives can be mentally overbearing or even deceitful in order to serve their personal ends. (Now, that sounds like it could be Katy). There is also a tendency to want to remake others' thoughts and mental perceptions.