Who is Kirsha from Midaq Alley and what is their importance?

A poor café owner, Kirsha squanders his considerable café income and takes risks peddling narcotics after dark. Regularly, Kirsha's sexual passions overwhelm him and he goes out looking for erotic adventures with young men. Kirsha's perversion is so well known he no longer hides it, and he enjoys creating scandal after scandal. He invites to his café a young salesman and serves him personally. When Mrs. Kirsha objects to his "sin", Kirsha demands she obey him. Kirsha is adept at playing dumb.