For those who have not completed games in the Xenoblade Chronicles series, this page contains spoilers regarding the plot. Discretion is advised.
The Great Hall is a location in Xenoblade Chronicles. It is located within the Imperial Palace at Alcamoth. It is the large hall entered directly after walking into the palace. Several nameless High Entia guards can be found here, as well as Galdo, Lar'shen, Galvin and Lecrough.
It can be reached by skip travelling to the Imperial Palace and walking east into the Palace, and contains teleporters to the Imperial Villa and Whitewing Palace. If the party continues east, up the stairs, they will reach the Ascension Hall.
After the events of the Mechonis Core, it becomes inhabited by Telethia - eleven Arels, an Aora and and an Asara Telethia all either roam or guard the area. On the balcony near the Ascension Hall, seven more Arels can be found, along with Telethia Lecrough during A Release From Duty.