Adams' emotionless technician?
Yes, its the neural neutralizer therapist.
1. He operates the NN yet seems to be devoid of emotion himself.
2. When questioned about its operate by Kirk, he says, "Quite
simple. Off on switches, and the large control here changes the strength of the brain neutralising beam."
3. Dr. Adams takes over the operation of the NN every time he enters the room.
4. When Kirk and Helen are caught experimenting with the NN,
Dr. Adams takes the controls and the therapist physically takes control of
Dr. Noel 
.
5. Again, he shows no emotion. He smoothly operates the NN.
6. Once Kirk leaves the NN room, the therapist continues on the patient in the chair with, "You will forget all you have heard. To remember any portion of it, any word, will cause you
pain, terrible pain, growing more terrible as you fight to remember."
7. He's so minor of a character that he doesn't even get a name. Dr. Adams is the egomaniac here.