Who is Bayoumi from Woman at Point Zero and what is their importance?

Bayoumi owns a coffee-house in Cairo. He has a dark complexion and calm, resigned eyes, and Firdaus feels no fear from his face. After Firdaus runs away from Sheikh Mahmoud, Bayoumi takes her to live with him and promises to find her a job. At first, he is very kind, but when Firdaus insists upon working, Bayoumi beats her and locks her in his flat for him and his friends to use sexually, until a neighbor helps Firdaus escape.