RITSUKO (OFF):“Yes, it's something like a chrysalis
prior to reaching the adult stage.”
Frogatr: So Sandalphon and Adam have embryonic stages, i wonder what the other angels embryonic forms looked like, or if some of them appear fully formed right from birth.
UrsusArctos: You raise an interesting question. Although it seems implied that they all had humanoid embryonic stages, we have no further evidence about where the Angels came from or what their lifecycle is like, especially when dealing with weirdo Angels like Ireul and Leliel.