|“||All that is visible must grow beyond itself, and extend into the realm of the invisible.||”|
A Tower Guardian is a program charged with the task of guarding an I/O Tower. I/O (Input/Output) Towers are the places where programs can communicate directly with their users, and therefore are considered holy places. As such, the Tower Guardians are regarded as religious figures. The Tower Guardian will even say a prayer before allowing a program to enter and communicate with the user.
Similar programs can be seen working at consoles in Cache Facility 6 in Tron City.