"The flame is the soul’s breath, The black smoke is the soul’s release. Ashes thou wert and art. May thy soul return to the great flame of fire."

Those words were uttered through the fire filled building, as you (the infernal) were getting your shit rocked by the rest of the fire force.

"Látom."

But, as Iris finished the prayer, and Shinra delivered a mean kick to your jaw, you... didn't die.

If anything, you went back to normal.

(Cut to after they carefully take you into the station for questioning.)

"...Why didn't the prayer work? What are you?"

Iris said, while carefully and precisely inspecting every crevice of your non-charred face.