So the idea that only something not alive can make it to the bottom further cements the parrarells Made in Abyss has with Roadside Picnic. In Roadside Picnic the only way to make it to the center of the zone and reach the Golden Sun was to make it through an anomaly called the meat grinder...
Its been a minute since I read this part in the novels but if I remember correctly she went into detail about how off balance she was after the horns were cut off. Those things were HEAVY and she had to practice walking a bunch before actually heading out to get Kousuke.
If humans had wings they'd actually likely come out the lower back or waist instead of upper back like typically depicted with angels and such. This is due to the fact that our center of gravity is lower down there and to fly stablely the wings would have to be as close to the center of gravity...
Something tells me she's gonna try and setup an arranged marriage or something between him and one of her grandkids, probably Himari but I can see her having them compete for it or something like that.
Honestly reading this after seeing Deadpool and Wolverine all I could think about was when all the Deadpools stopped fighting because they saw Peter and wanted to hug on him. The Reds did the same thing here with Idola lol