Arlecchino, also known by her codename "The Knave," is 4th of the Eleven Fatui Harbingers. She is sent to Fontaine to go after the Hydro Archon's Gnosis, and does magic shows along with a pair of twins, Lyney and Lynette, to distract the audience, there is no magician better than these twins, but Arlecchino keeps pushing them to do even better, to mesmerize the crowd.