Either I'm confused or there is a piece missing somewhere.

At the end, Heidemarie thanks Remilia for assistance in the fight and I have no idea what she is referring to. Either it is off screen and not hinted at or I'm misunderstanding the scene completely. What is going on?

-VR
conspiracy-theory-meme.jpeg
"They copied all they could follow, but they couldn't copy my mind,
And I left 'em sweating and stealing a year and a half behind."