2:10:44
Q: Will there be frames in which we can place art? If so, will it be possible to take a screenshot and place it within the frame?
A: Yes, there are frames which you can place artwork in. Please check out the various artworks our art team has prepared for you!

As for the screenshot feature, we previously had a request for players to be able to design their free company crest by using screenshots and we stated that it would be difficult to judge what images can and cannot be allowed to be used. Therefore, we currently have no plans for players to be able to use screenshots.
I take that as a no-go for custom FC crests and whatnot.