Cassim

Cassim was an old friend and the adoptive brother of Alibaba Saluja. When Cassim was younger, he lived in the slums of Balbadd with his sister and father. One day, his father was beating him and his sister until they were saved by Alibaba Saluja's mother, Anise Saluja. After saving them, Anise took them in as a member of her family. One day, Anise suffered from an illness and died. At that point, Cassim took on the role of taking care of them. Although he is the cadre of the "Fog Troupe," he is the real leader of the "Fog Troupe." He uses the magical weapon "Sword of the Black Binding Fog." He had lived with Alibaba in the slums like brothers when he was younger.

His name is based on the brother of Alibaba in "Alibaba and the Forty Thieves."

(Source: Magi Wiki)