These two pieces are illustrated by Denny Ibnu, who did a wonderful job on them!

This piece is by Michal Kváč, which I ordered so that I could use it for early pre-orders. This is supposed to depict a version of Castra from the northern side.

Here we have character reference sheets of Talyn and Melody, each illustrated by Wooserr (NSFW content on their page, you’ve been warned).