[Zeydra]

I only just realised something. It's probably old and probably already been spotted, but the Vagans home is called Second Moon.

Spoiler for Episode 43 onwards:

Mars already has two of them (I think). Earth only has one. Second Moon just rocked up to earth in episode 43, thus becoming it's second moon (or at least that's probably the ultimate goal of it's arrival, or claimed goal).

Just thought it was kinda neat that they've probably been foreshadowing it this whole time.