Board Thread:General Discussion/@comment-7342272-20171108034153/@comment-6986530-20171108220732

I don't think we have enough evidence, if any, to assume that Gaou is a descendant of Gast. All we can really say is that he's a descendant of Lukana Octo and Venomania, and Gast was also a descendant of Lukana Octo and Venomania, but it does not have to be a single straight line of descendance.

I do think that, given what's stated in the story, it is safe to assume that Gast is the father if Nagisa's baby.