User blog comment:B214/New anime 2017 discussion blog/@comment-97.86.117.132-20161230234256/@comment-10330822-20161231141045

Shin is a Nephilim, which is intriguing as hell. I mean he's basically like Dante and Vergil from DmC. They had to do god knows how much research to even get to the point where he could be born. I wonder what kind of powers he has besides the obvious Angel ones and swordsmanship. You'd imagine there may be some "loop-holes" around his powers because he is a being that is never meant to exist. a Devil/Angel Hybrid.

Shin might be more powerful naturally, but I feel with the Power of Destruction and Diabolus gauntlet, Ex has a really good chance of being stronger. The only problem is Rias isn't necessarily the strongest wife, she's powerful, but its not like she's as strong as Sirzechs.

I'm also curious why Kurenai isn't stronger though. Akeno is probably one of the most powerful girls in the group, so her and Ise's child should be incredibly strong. Not to mention he's the oldest.

My guess is that he may have "implied" power, like Azazel. He seems more into gadgets and inventing than just using raw power to smash things.

I'm also curious about the child of Le Fey and Ise.

As for Airi, I feel its just that onee-san vibe. She's not necessarily stronger than them, she just controls them through fear because she is older.