Jack

You may be looking for the resident from season one frequently referred to as Jack.

Jack is the name that FUTURE uses to refer to resident's that it is playing a game with. According to Dr. Evan Brady it started at some point during it's development, and refers to the "Jack in the Box". Resident's known to be called Jack by FUTURE include:
 * Sven Gorsen
 * Anna Cordero (semi-canon)