Location: Ruins of Castle Schrade

you were assigned to hunt down the so called 'Black Dragon' and slay it once and for all. The stories say that this particular monster took down the entire kingdom of Schrade in one night, and it was a terrifying job... but you had to do it. Once you entered the main ruins, you heard a female voice

Awe, what's this? Another knight coming to slay me? Please.

the voice would say, once you turned through the pillar you saw a female dragon girl playing with some kind of harpoon whilst laying in the ruins of the castle