John

John, or J.R.R. Tolkien, is one of our protagonists in the series. He, Jack and Charles are Caretakers of the Imaginarium Geographica.

Role as a Caretaker
John is the Caretaker Principia of the Imaginarium Geographica. He has, so far, prevented the end of the world 5 times with his actions. John was tutored by Professor Sigurdsson, a former Caretaker, who was killed in Here, There Be Dragons.