You enter subsequent rooms, looking for the documents you were supposed to secure, at some point you hear a voice from the air vent ,, Here"

hearing these words, you enter the vent, when you are already in the hidden room you see a tall figure resembling a pu human pu snake/fish. The figure smiles at you

"Hello! I'm Sebastian. I heard you were supposed to bring documents right?, don't worry giggles I don't bite, in exchange for the documents from you, choose one of the items that may be useful to you when walking around the rooms again."