Eps 12

Well, that's proof enough. I didn't really expect that one at all.

Well, with the issue of Roy's daughter's identity resolved, the next remaining issues are still with Rose, Solty, and RUC.

We obviously have no idea how Solty ended up the way she is, so that's coming up at some point, but the bigger connection is between the RUC girls and Rose. In the eps where Rose was trapped with Solty underground, a red pattern appeared on Rose's face after the fire started. That same pattern appeared on one of the RUC girls when she was confronting Ho. I can only assume that Rose was subjected to the same experience that they were, also linking why the RUC director is so interested in her.