This will not work.
For each character there is only one opportunity to define the name.
Once this is done there is no way to repeat it.
Except maybe starting the story from beginning once again.
But I think we went to far to try that now.
So now we will have to keep calling her the "other girl" or something like that.
Actually, no, this is stupid.
We found her by looking for a "lucky finder" so I propose that this is how we call her from now.
Now, the question is:
Do you want to be this lucky finder?