The angelic thing is likely Seraphim. The Seraphs were depicted as six-winged serpents, and Seraphim was a beautiful woman summon in FFVI. Seraphim is the plural form of Seraph, though. I wonder if they'll change it, or if they'll make multiples. Maybe it's the primal of the Sylphs? It's also a possible new twist on the Siren summon. Sirens were depicted, among many things, as birds with woman faces.

In a way they kinda mash the two ideas together, since Siren in FFVIII had golden wings. It wouldn't be the first mix and match (*cough* Bow/harp *cough*).

Btw did anyone else noticed the Qiqirn-shaped rock structure looks just like the earlier artwork of a rock structure? It seems SE is making all of their symbols as big and obvious as possible, such as the GIGANTIC new aetherytes.