The 9th floor is always at below zero temperatures, and the floor is filled with various drinks and snacks. Tera comes here to eat sometime, but doesn't even bother if he left his scarf. The sense of taste is dropped on this floor, so take the food somewhere else. The 13 doors on this floor lead to one of the following:
-1st floor
-2nd floor
-3rd floor
-4th floor
-5th floor
-8th floor
-10th floor
-11th floor
-12th floor
The other 4 doors lead to somewhere that only Tera knows.