Highborn at Heart
This quest starts right after Octavia and Regongar study the documents found at the Janush’s lair (in case you’ve saved the people instead of chasing after him, but anyway he always runs away). So, the quest is based on Octavia’s story.
Once you eliminate Irovetti, leave Pitax and enter it one more time. You’ll have to choose where to move (you do the same thing in the capital). Pick the Lonely Mansion instead of Academy, Port and Main Square.
Come inside and talk to Octavia’s mother. Then, return to the capital and talk to Octavia this time to complete the quest and get 4600 XP and the amulet. Besides, if you choose the right phrase, you’ll get additional 9600 XP.