User blog comment:Derax-Pagani/Chapter 507: Voice/@comment-5894890-20161025000918/@comment-84.197.239.101-20161026171816

Why do some people assume God Serena caused some other chap to be thrown out of the group?

Maybe there were 11 at first and then Serena joined, bringing the number to 12.

The author originally intended to have fewer members, like 5 or so, but then decided to have 12 of them. So I doubt Serena is a replacement.