Jack is one of the main characters in the fan fiction story Casket's Admin Hunt, written by Justjackbros, TheLoneClone, and ThisIsMysterical. Like all of the other characters in the story, Jack is based off of the Wikia user Justjackbros. He will also appear in the sequel, Admin's Casket Hunt, in which he will be killed off, as the real Jack left the wiki in 2015.
A brave, strong guy. Very snarky, but very kind. Get on his good side and you're perfect, get on his bad side and you're dead. He may/may not have a crush on his friend Val.