Trait Question

[Cassi]

That trait was used to explain a plot waaay back when horses like Gaea and Hel "fell from the stars" to become rulers, encompassing the memories of previous rulers. It's not really a trait that's given out or used beside that plot.

But to answer your question, it's memories of the past rulers only. I don't know how many rulers - you'd have to ask the people who played those horses.

Hope that helped!