What entity initially sets down the conditions or rules of behavior that must be followed by the probationer?

The answer is the court.  Most probation orders take in a contract amid the court and the offender in which a custodial or prison term is postponed and the probationer undertakes to comply with a set of trial rules or conditions commanded by the court. Take note that, probationary sentences may be decided by federal and state district courts and felony or state superior courts. 

glass wants to live in a world of super heroes and villains. he have lived all his life trying to be responsible for the creating the origin story of a super hero; he schemed and caused many incidents (many of them fatal) hoping that someday someone with superpowers would show up and save the day.

he knew himself very much. he saw himself as a villain of a real-life super hero story. he was aware of his strengths (more than smart enough for being manipulative and scheming) and weaknesses (having fragile bones and having to rely on his mind to succeed).