Anyone got spoilers about their younger brother? Will he be normal or a bit off?

We don't know much an Bliss since his story isn't out, but from slight things picked up from other stories, he looks like Koi the most and behaves a lot like him too, but he tends to think at times like Grayson, but that's just from my own findings when I was reading Lick me up if you can, run away if you can and desire me if you can