Here is Echo's main moodboard.
I'd go with even more, but I preferred summarize everything

Okay so Echo's about a lot of medieval things.
Basically, inspiration from:
Fire Emblem, the 9/10 are my favourites, and it's about the clothes styles of my characters. (hence the armors/weapons on the side)
Avatar ans Legend of Korra, though I knew those after beginning my story, they are pretty similar to this balance system. This, linked to the Yin and Yang theme + magic.
Strong women figure, like Mulan and Joan of Arc.
A LOT of mythologies, from every part of the world.
Nature and architecture from Europe, some european/arabic/asian places and culture. Even if we only saw nature and european places for now!
+ Okami for being awesome, having awesome musics and the light/darkness theme.
There there
I got a moodboard for some characters too, but it would be too long, heh.