The Manduri are causing trouble for the villagers, which is why Aurelius asked that they be dealt with. After you had killed the Manduri and returned, you discovered a paper aeroplane in the Manduri Village. You learned from the paper aeroplane that Melginie was being kept prisoner in the Manduri Village. A conversation with survivors revealed that the Manduri were human once. You passed the request to save Melginie on to Celestine.