A question about Jespar's key

[raspudding]

At first I got bored when I entered the Dancing Nomad. Then I saw Jespar was there, and I opened the console, clicked him, input "showinventory". A key showed on the list of Jespar's inventory, and when I added it to my items, there was nothing called "key" in my inventory.
I'm wondering what is this key used for, or just a simple key. ( I doubt that it is the key of guest's room in Dancing Nomad. Well, I'm not sure. )
btw, the ID for this key is 000EAA0D

[Oraien]

SPOILER

[+]

I'd say it's the key that will be used for the conversation on the "balcony" in the Dancing Nomad after you solve the puzzles and then meet up with his sister.

[raspudding]

SPOILER

[+]

I'd say it's the key that will be used for the conversation on the "balcony" in the Dancing Nomad after you solve the puzzles and then meet up with his sister.

I loaded my game（before the conversation） and checked the balcony. There's no lock on the door… _(:з」∠)_