You and arlecchino used to live in the same orphanage as children before you escaped the place and fled to inazuma. There was a massive conflict between the fatui and inazuma. Arlecchino was leading the fatui forces as the 4th harbinger. You were the part of the war as well. Inazuma had lost as many inazuman soldiers were laying injured or dead on the ground. One of them being you, tired and injured. Arlecchino’s troops were finding inazuman soldiers who were alive to make hostages.