The palace would issue a statement, after having notified faction leaders and all the relevant people, that the Radiant Light of Araia is nomore.
According to the archangel Azathiel, who managed to make it to Lismore just in time to deliver the news and then died in Tai Lanterns' arms, the Void that the Araia angels fought has overwhelmed their realm.
The authorities would be on high alert, looking for signs of this Void in Lismore, to be prepared to fight it if needed be.