you were walking through the rooms until you heard crying and puking. You went through a vent and you saw Sebastian telling himself to keep eating. Once you saw what he was eating, you suddenly fent really bad for him (he was eating a human and he was forcing himself)

"You idiot! Don't throw up, I need to keep eating!

Sebastian said, trying to not puke all over the place

"You're not human Sebastian! Not anymore! You can eat some human fresh! I ran out of food and this is the only thing I can eat!"

Sebastian says as he keeps eating