Hanami can successfully trace the purpose of the magic circle on the entrance, where they found Hibana.
It seems, the seal of the entrance was made in a way that, if overwhelmed with the element of fire, it would be broken, and that would explain Hibana being summoned. Not her lack of memories, though...
"Uh... Looking for missing girls? How boring..." Athena mumbles, as she scries for the lost girl. Despite the hardship of looking for someone she never saw, she can sense something!
On the mirror, Hanami (and the others who care to look), find a girl among a nebulous and undefined place. She's not alone! A great aura of darkness seems close to her, the sound of a heavy gate being shut can be heard.
"She's just south of here, mistress. I'm sure of it... Now, can we go back to scrying on naked girls??" She says, quite loudly, for everyone to hear, an image starting to appear on the mirror, for Hanami's dismay.
OOC:
I will write the scene on the next room, presuming everyone's going there now. If you have unresolved business in here still, feel free to add them to your next post.
As the girls hush south for the next room, they found themselves in an antechamber, they can see the remains of some wooden furniture, no doubt from the last century or the previous.

Mysterious Man
Curiously though, a man seems to be sit in one of the old wooden chairs, leaning lazily on it, smoking a cigarette, his dark long coat and black hat contrasting with his pale blonde hair.
As he spots any of the girls, he demurely stands on his feet, and bows down in greeting,
"Greetings, good ladies... A pleasure to make your acquaintance." He says, with a deep and velvety voice.
"And what such radiant youth seeks in this old and decrepit light-forsaken place?" He walks to a nearby table, his gait impeccable, and wipes the thick dust from it.
"Oh, don't tell, you're looking for a girl, perchance? He chuckles.
"Well, well... She is just on the other side of the gate on the chamber back there." He points with a cane he produced from inside his cloak.
"They just had it shut though... You will have to pass the charade, I'm afraid... But may still get them, if you be fast."
He checks his pocket-watch, made of pure gold.