The Devil of The Rhine

The laughter of a young girl resounded from within the hellfire of bullets. Tanya Degurechaff successfully stalled the mages of the Entente Alliance at the border invasion of Norden handing out a one way ticket to hell free of charge. A God who was physically present in the world watched the battle, taking an interest in Tanya and the scheme of the otherworld God, Being X.
After she blew herself up, the God confronted Tanya.

(I don't own Youjo Senki or any affiliating characters canon to the series, nor the image used for the title. I recently rewatched Youjo senki for like the 4th time and thought, "Why not?"
Here is the result.)