If you want to find Gregory he is by the left window in the forest and disappears once you get too close. Also the Smile Wolf is located by the barricades in a inaccessible corridor by Mr Cleany Cleans office, and slowly reduces your sanity if you look at him for too long and can possibly kill you.
Also if you are wondering how to get to the Rust Maze you need to leave a few pieces of paper or foil in front of the door and wait for Mr Cleany Clean to take the trash away which will open the door upon contact. This will allow you to have access to the secret room.(If you have the belt already you do not need to do this) You need to go left and enter a room behind Mr Mix's Kitchen and open both lockers with a crowbar (you might need multiple) and then you will receive the Artifact Knife. You will need to go back to the room with the Knife (But avoid the Headmistress as she will kill you on sight if you are holding the knife). Once you return to the secret room you need to open the right door with your Artifact Knife and you have arrived at the rust maze. Now you need to avoid Freek'A'Delika and retrieve the Artifact belt in the middle of the maze, and once you manage to get the belt you can save the Knife in your belt. Also you need the blue key to access the corridor with Albert's Limbs.
LOL I'm a bit late to this......
-Sorry