Jeff is a man of secrets. At the start of the series, he is revealed as the only character familiar with seeing the Slender Man entity; Thus, he is the catalyst of the series, and is responsible for victimization of all the characters initially involved. It is later revealed that he has a dark history that hides from everyone, including his friends. Despite this, he is a strong-willed, solid-minded individual with a good heart, whom often assists the others. As the attacks continue to occur, Jeff's personality evolves from cautious to bold, if not overly-so. Most often, you can find him testing his car's limits by off-roading in his free-time.