User blog comment:B214/High School DxD EX/@comment-93.105.246.116-20160208230209

Hmm the fact La Fey's child is "the missing one" here makes me wonder if it's due to the fact of her short life.

I mean Issei had far less interactions with Elmenhilde yet their child was fine.

But all these "fighter" kids are that of devil's who are nearly immortal including Kuroka, while Elmenhilde is a vampire.

La Fey however is only a witch so 30 years from now she will already be middle aged. So maybe Issei lost interest in her once she showed the signs of aging which is why it was easy to alter their childs timeline.

Unless Issei reincarnated her into a devil once he got his own evil piecess.