Mr. Imaginary falls on the grey line between existence and nonexistence. He resides on Terry's hard drive and is by far the most acquainted with him. He is not the most reliable of people mainly because he cannot interact with the outside world in any way. However, if you ask him to remember the location of a file or folder he'll happily do so. Because he is so familiar with Terry he has no trouble doing whatever he wants all day. He usually has the job of defending Terry from malware and the like.
Mr. Imaginary was featured in the Actionfiguresinator (set 3). Don't ask me how.