In Ys Seven, Xisa was first introduced when Geis and Dogi were held in the same jail cell below the Coliseum after Adol was accused of assassinating King Kiemarl. Geis tasked Xisa will retrieving their equipments for them so that they can escape as well as rescue Adol.
Xisa often appears with Jue and Sera to serve as Ciarius and Geis' go between. They played the important role of notifying Adol and company of the dark miasma that permeated through Altago as well as scavenging for survivors. They were also the ones that notified Adol the discovery of the Moon Altar right in the middle of the Iskan Village.