Indeed, she don't have a belly button for two reasons: First, when I don't really know what I'm drawing (when it comes to characters), I consider it comes out from my brain, and there's no uterus inside it (thus, no placenta, no umbilical cord, just an idea). Second, this one became an early concept for Alansh'rahh'nin, a goddess of my world, and she didn't born, she was created. Thus, the whole thing matched ^^
To make it simple, she's a schyzophrenic character (more or less like Two-Face): her first role was to raise up men souls, but she inflicted them tremendous pain to reach this goal. Their excessive suffering corrupted her soul and body, making her hate them as much as she loves mankind.
This characteric is shown through the four magic fiels she's associated with: life an death, healing and disease.