Promised Pen (Anime)

''This article is about the Anime version of the Promised Pen. For alternate pages referred to by this name, please click any of the icons above.''

The Promised Pens are objects possibly made by William Minerva, which were either left behind at certain places or given to certain people for the orphans of Grace Field to have the chance to find a safe place in the form of Shelter B06-32.

Function
The pen has at least 5 known functions:
 * Location: When the middle of the pen is opened, it projects a virtual navigation map for the orphans to find their way in and out the Grace Field House. It also shows their location outside the orphanage.
 * A key: The pen is the only known key to enter the secret Shelter B06-32 underground.
 * Codes: The pen contains multiple unknown codes and messages.
 * Writing: The pen cannot be used to write with.

The Map
The pen serves as a navigation map for the orphans to find their way in and out the Grace Field House. It gives clues on where to go in certain codes.
 * B06-32 is the location of the underground Shelter B06-32 in the demon world.