Kashta was a member of the Hidden Ones, he operated in the Sinai.
Kashta, Tahira, and Bayek were ambushed and captured at the Hidden Ones bureau. Kashta and Tahira were later saved by Bayek and Amunet but Tahira died in Bayek's arms. Kashta was furious and wanted revenge against Rufio, but he was told by Amunet to bury Tahira and leave Rufio to her and Bayek.