The Demon Kingdom
( Eren's POV )
After surrendering to the demons, Eren was chained and transported alongside the other human prisoners to the Demon Kingdom, where instead of being sold in the slave markets like the rest, he was brought to the Demon Count Vaugn for interrogation.
During his journey to the Demon Kingdom, Eren's mind raced with a thousand different thoughts, and he found himself surprisingly excited about his situation.
Rather than feeling terrified at being a demon prisoner, Eren felt a sense of satisfaction and happiness as he began weaving fantasy tales of his rise from prisoner to the Demon King's counselor over the next few years.
He naively believed that the demons were not inherently evil and that the Empire had spread a false narrative about them. Eren convinced himself that the demons were not truly bad and that he was going to get the opportunity to witness their better nature once he reached the Demon Kingdom.