East Coast USA?)
you can give it a better read when you're lucid. :3

She can provide assistance to Sasha and Ren, then explain that she was on pilgrimage in the area and felt honor bound to offer her assistance.

Or, she'd recently been released from the hospital due to a bad injury she suffered while fighting a rival? She was then told to go to that area and provide due assistance by Mr. ??? Level?

Or she can already be on the train?

She'll be 19 or 20 years old. I have yet to decide.