I've been reading over that story Kairi's grandma tells because I have a huge feeling it holds some secrets about BBS. I think that it tells us about the unbirth. It says."...darkness was born in their hearts. The darkness spread, swallowing the light and many people's hearts." I don't think this tells us about the Heartless. I think that when the people were swallowed they created Unbirths. A heartless is when the heart is swallowed, I'm thinking that the darkness swallowed the entire body,heart,soul, EVERYTHING. The darkness sorta stopped their exsistence, reversing their birth. Unbirth. So when the darkness swallowed everything it created Unbirths then after the light fragments in the childrens hearts rebuilt the world the darkness was less powerful. so it could only prowl on hearts. That would explain why the Unbirths disappeared and then the heartless took over. The Darkness is weaker.
Whacha think.
Whacha think.