Psst, over here

You were going through doors searching for the crystal when you hear a voice come from a vent. You decide to check it out because why not, so you crawl through the vent. When you get through, you find a very tall, fish looking creature with items on his tail for sale in exchange for the data you've been collecting.

"Welcome! Don't be afraid, I'm not going to hurt you; despite what you may have seen, heard and/or been told. My name is Sebastian, your 'only' friend."