He can be found on the southern side of the large escalator to the east of the Main Entrance on the ground floor of Alcamoth, during the night. After the events at the Mechonis Core, he can be found anytime at the Oath Sanctuary in Satorl Marsh. Once the line of quests starting with The Imperial Ceremony has been accepted, he can be found at night at the Sororal Statues with the other High Entia refugees.