Eren was escorted by the Servant to the rooms that were arranged for them.
The rooms arranged for the three of them were situated next to each other, but they were located in a completely different part of the Palace. They were far away from the Grand Hall and the section where the Emperor resided.
This area was also less guarded, likely to make the guests feel more at ease. Instead of being made to feel like prisoners under constant surveillance, they were left relatively free, with guards assigned sparingly.
Although it made sense from the Emperor's perspective, Eren had a feeling that this was not his decision.
Although it was good to make the guests feel comfortable, why would the Emperor take such a risk? If something happened to the guests in the Royal Palace, the blame was going to fall on him.
Either he was confident that nothing was going to happen to them or it was the work of someone else.