User blog comment:B214/Shin DxD 1 discussion/@comment-78.4.96.213-20180721163242/@comment-33359929-20180723144730

Gabriel's either going to be in Issei's harem (and subsequently having a kid with him), or she isn't going to have a husband at all. Since she's gonna be busy with being the centre of Heaven's system, I'm leaning towards the latter option.

And when it was introduced, Touji said that more were being created, so that should be enough. It's more evidence than you give for your terrible, TERRIBLE fanboy-based arguements anyway.