He nodded at the question, "Yeah, gene splicing. Hybrid mostly explains the physical changes, but we don't know what all else they did." And most of it had been while they were still embryos, so it wasn't like they were given a list of possible traits.

Another shrug that was mostly wings followed, "I saw some of the failures." He added, a little more quietly, "Before..." A vague gesture towards his face, "And we ran in to more of them after we got out. Most of them didn't live long enough for powers to develop. The DNA unravels after a few years, we're the only ones who haven't had our genes start falling apart like an old sweater."

He looked up at the approaching footsteps, and even smiled, giving a nod at the introduction, though his brow creased a little at the question, "Older brother, and only technically. But I'm pretty sure we're not talking about the same Angel, unless yours is a sixteen year old girl." A pause then as he calculated, "No, sh...oot, she'd be seventeen now, going on eighteen."