The god that gained its prominence during the reign of Akhenaten, who abolished the traditional cults of Egypt and replaced them with the Aten. This created the first monotheistic cult in the world. BA. . The ba can best be described as someone's personality. Like a person's body, each ba was an individual. It entered a person's body with the breath of life and it left at the time of death. The ba is associated with divinity and power. It had the ability to take on different forms, in this respect the gods had many bas. The ba of the deceased is able to move freely between the underworld and the physical world. The ba is similar to the ka.