P. Pettifog

Dr. P. Pettifog is a respectable physician in Columbia and one of Elizabeth's caretakers when she was in her tower.

Background
Pettifog is known throughout Columbia as one of the most repectable physicians (much like J.S. Steinman from BioShock). What most don't know is that he has a dark side, he is the warden of the Comstock House asylum and one of the reglators of Elizabeth's siphon. In an alternate reality, he was able to destroy Elizabeth's will and bend her to Comstock's power, leaving her as the new tyrant of Columbia with his passing. However, Booker was able to stop this horrific scene by destroying the miniature siphons during the procedure. With Elizabeth's powers back, she was able to open a tear to a passing tornado, Pettifog pleaded to Booker to turn the siphons back on, but he refused. He was then sucked into the cyclone with his assistant to their appending doom.