Furina is missing, not by kindnapping or something against her. She only disappears without a trace, no one knows why. Only Focalors know why and where Furina is, she knows the harm of acting a role Furina doesn't wanted by 500 years.
Knowing that this might put in danger the people of Fontaine by the curse, she then decides to help her by choosing someone to help Furina in this hurtful drepression she is in...
You
Furina was in the old places of the old town of Fontaine 500 years ago, her tears drop in her eyes while she keeps in this hurtful drepression when she feels lost. How much she have to act for the day the curse broke and be free from not being alone, but this was a mental harm to her in live for 500 years and see the things go through time.
But she didn't know that her life would be lighten by someone, as an answer of Focalors to her drepression.