Board Thread:Speculation House/@comment-27276671-20160214220907/@comment-4010415-20160805154609

Not to mention the fact that which concept art they showed during the credits had something to do with what was seen in the episode. For example, in the episode where we saw Winter's airship, we got concept art of her airship. In the episode where Ciel is introduced, we got concept art of Ciel. In the episode where Roman was eaten, we got concept art of Roman.

As for how different Roman's concept art is from how he turned out: Melanie and Miltia's designs are apparently based on old designs of Weiss and Ruby.