Ankh gained a soul by the end of canon! Long story short he had realize what being alive really means as opposed to being a greedy monster who doesn't care about anyone. The way his species works is that they're made up of cell medals instead of biological cells. So each of them have a core medal that holds his or her consciousness. Under normal circumstances, when that core medal breaks, they just disappear. No soul and the consciousness just vanishes. Ankh became the exception. After he died, he definitely spent X amount of time as a ghost and went wherever he went.