you were wandering the Hall of the Hadal Blacksite until you heard a familiar mutter from the vent off to the side, it could be from some mimic but you heard it before. You chose to crawl through the rather tight vent before you heard a surprisingly cheery voice speak up

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

Sebastian spoke, two of his arms crossed and the other on his hip