Your Friend, Jack (usually called Jack). is a mysterious entity in the backrooms. Jack has never been observed by anyone accept for a small group known as the Followers of Jack. Wanderers will occasionally find gear lying around with a note attached to it. The note will address them by name and tell them that the gear is theirs, it will be signed "your friend, Jack". Sometimes Jack won't give a wanderer any gear but will instead give them a note warning them of danger. Some wanderers who were going insane recalled mysteriously blacking out and waking up in a nice bed with a gallon of almond water and the words "enjoy the accomadations. Your friend, Jack". Jack was known to sign his name as "Jack DeCarlos" in the 80s but he has since referred to himself only as "Your friend, Jack".
The Followers of Jack
The Followers of Jack were a highly militarized group that appeared in the late 90s under the leadership of Daniel Cross. The group's stated purpose was to provide aid too wanderers and to make the backrooms a safer place by neutralizing threats to themselves and humanity. They were known to have fought various wars with the partygoers, the Order of Augorash, and the Shadow Empire. They merged with various other groups to form a group known as the society around the late 2000s to early 2010s.
Accounts of Jack
I was running low on supplies in level 0 when I heard a sound in the room behind me. I immediately turned around and pointed my gun into the room but there were no entities there; instead, there was a backpack sitting right in the middle of the room. The backpack hadn't been there when I was in the room, it only appeared after I had turned my back. I approached the backpack and found a note attached to it. The note read "I though you might need this. Your Friend, Jack". ~ Michael Jenden
I don't remember exactly what happened except that I had run out of almond water and was slowly going insane. I recall that I had been walking down a hallway in a daze when I was hit in the head with something cold and metal. When I woke up, I was lying in a nice cozy bed and I was fully sane. Written in large red letters on the wall were the words "enjoy the accomadations. Your friend, Jack". There was a gallon jug of almond water lying on the floor. ~ Barley Barlow