Review Detail of Sigmao in I Am Heaven

As of chapter 7, it seems interesting enough that I will continue reading. although I'm not sure how the author will continue it but im interested in finding out. I feel like the pace has been eey fast-paced so far, which isn't necessarily bad, but I feel like spending more time with some of the future main side characters in their youth would have been nice, or showing a small part of the development of humans and demons would have been nice too.