|• Professional Status•|
|Affiliation|| Plant 3 (Formerly)|
|Previous Affiliation||Grace Field House|
|• Personal Status•|
William Minerva is the owner of all the books that are currently available in the library of the Grace Field House.
In a bonus page, he declares a revolution and seals a "New Promise". C49P20
William Minerva's profile is never yet revealed in the manga and it is not even known to the public where he is alive or not. But some little things are known about his appearance. He is a tall man, who is almost always seen wearing a gray suit with a gray hat.
Phil discovered that all the books contain some kind of secret message in them. Telling the children to ''run from the house, because there is danger''.
William Minerva also left a pen behind for Sister Krone with the initials ''WM'' on it, implying that the initials are his.
- In the colored front page of Chapter 18, William Minerva is seen delivering the orphans of Plant 3 Christmas gifts, being dressed as Santa Claus.
- William Minerva's name is most likely adapted from the 1908 Literature "Miss Minerva and William Green Hill" by Frances Boyd Calhoun.
- The kids think that he currently resides in B-06-32.