Esthar`s symbol?

[Serapy]

although why the Lunar Cry would be specifically related to Esthar is a mystery to me. I'm sure you have a theory about that!

Yes, it`s sort of like a traditional thing going on at Esthar (hence people talking about it and the appearance of the symbol in Esthar`s city) because Lunar Cry has happened in the past, and so on.

The other stuff is hard to say what it could be. Maybe the Estharian skyroads

Hmm, I think the lines came from Lunar Fall. Like, during that event, did you not see a lot of white/yellow narrowed lights being spread out from the core (the core that dropped from the moon).

Oh, the same symbol is also displayed on the Lunar pillar.