Who is Mr. Frost from That Hideous Strength and what is their importance?

Mr. Frost is a sharp man who is concerned with objectivity to the point of denying his own soul. His kind of objectivity is a prideful one because he denies everything about himself that is in the least bit subjective, down to the motives for his actions. He is in the inner circle of the N.I.C.E., and he is almost as powerful as Wither. Frost is the one able to spy on Jane's dreams by telekinesis. His own pursuit of objectivity leads him to end his life after the N.I.C.E. begins to fall apart.