Teleborian was Salander's psychiatrist when was in St. Stephan's Hospital as a child. He's the man responsible for her being kept in restrains in a stimulus free room. Now he runs St. Stephan's. He seems utterly corrupt and evil, and he can't wait to get his hands on Salander again.
Salander learns that she and Teleborian didn't meet randomly. After she set Zala on fire at age twelve, Gunnar Björck of the Security Police enlisted Teleborian's help to make sure Salander didn't draw any attention to Zala.
As things stand when the story ends, Teleborian is high up on both Blomkvist and Salander's list of people to get revenge on. It might sound vindictive of us, but we can hardly wait to see how his story pans out.