For those who have not completed games in the Xenoblade Chronicles series, this page contains spoilers regarding the plot. Discretion is advised.
Zanza is chained on this terrace, and transforms the Monado into the Monado II after Shulk frees him. Metal Face appears here and kills the Giant and Sorean Antiqua. However, when Shulk is about to kill Metal Face, Face Nemesis blocks the attack and flies away with Metal Face, revealing to the party that she is actually Fiora.