In Ys Seven, Xisa is first introduced when Geis and Dogi were held in the same jail cell below the Coliseum after Adol is accused of assassinating King Kiemarl. Geis tasks Xisa with retrieving the party's equipment so they can escape as well as rescue Adol.
Xisa often appears with Jue and Sera to serve as Ciarius and Geis' messengers. They play the important role of notifying Adol and company of the dark miasma that permeated through Altago as well as scavenging for survivors. They also notify Adol about the discovery of the Moon Altar right in the middle of the Iskan Village.