Ruby and Mulan resurface (with a third party?) in Episode 18.
Finally! Some confirmation on when they’re back!
Also, predictions on who the third party is? I’ll say Dorothy (since we know that she first appears in episode 17 and has a multi-episode arc).
There is also Merida, who has appeared with Mulan and Ruby before, and Adam and Eddy mentioned that she’s supposed to return in 5B. That definitely squashes any of the speculation that Jamie’s tweet was referring to OUAT. Clearly she was telling the truth.