Orin might just be harboring a resentment over C.T. moving into the Headmaster’s office and changing the door’s ‘TE OCCIDERE POSSUNT…’ before Himself’s microwaved head had even cooled, even if it was to take over a Headmaster’s job that had been positively keening to have someone sedulous and brisk take over.
Orin despises C.T for trying to take his father's place. Even though Orin did not like his father much.