Combatants Will Be Dispatched!, Vol. 5 (light novel)

In the week since Lilith arrived, the Demon Lord's army has seensignificant losses, prompting an invitation to Six and the others fornegotiations. But could the invite into demon territory be a trap?! ...Mostlikely. Also, whenever someone says the words "Demon Lord", the image of someevil old guy comes to mind. So who is this beautiful woman supposed to be?!