I recall seeing someone pointing this out on ANN earlier this year, the 12th angel had a double helix design, fused with Lilith, and had a birth motif going for it, leading to the theory it might have been Armisael. I have not seen anybody bring it up here so I figured it'd be worth bringing up for conversation.

The comparison has definitely been made. A search using the term 'Armisael' in the Rebuild forum shows a few people casually making the comparison, while this thread goes into a bit as well as this one starting about here.