User blog comment:B214/High School DxD EX/@comment-25262334-20151125152504

So first spoilers are here. And we have confirmed two more daughters. Their names are:

Helmwige - 17 years old and she is daughter of Issei and Rossweisse.

Robertina Hyoudou - 15 - 16 years old and she is daughter of Issei and Ravel.

So basically basically nothing surprising here. In regards of last baby, that's still mystery, but there is slight hint that it could be son of Le Fay. But better to wait until futher confirmation.

Also more details soon.