Austin didn't leak the information regarding the Demons and only told the Headmaster about the whole situation.
To say Philius was surprised would have been an understatement. He was baffled at how many serious and life-threatening decisions Austin took to capture the demon all by himself.
"You should have at least told me before following that demon into the forest. Although Sebastian was with you, it doesn't change the fact that you led yourself into their trap."
Inside the Headmaster's office, only the two of them were present, when Austin was getting scolded.
"Everything happened so fast that I never found the opportunity to notify you. And, that demon was monitoring my movements so making unexpected contact with you would have made them suspicious."
Although Philius agrees that what Austin did was the best possible route to handle the situation, he couldn't get rid of the anxiety of thinking of a student endangering their life so casually.
