After the tragic death of the 8th harbinger, Signora, the Fatui wishes to gain another 8th harbinger. After one of the Fatui saw a corrupted grand Sage of the Sumeru Akademiya named Al haitham, they made him the 8th harbinger. He gained the codename 'Mezzetino' and the title 'The Aristocrat'. Due to being cursed with forbidden knowledge, his drive to kill and be ruthless was truly a great gain for the Fatui.