Yo jouste, have any of your other characters and concepts played more with their own sizes? Because with this one, I just noticed most of them can be assumed to be roughly the same size as a human being, and I can tell that is NOT what you wanted with some I can think of.
Do you think there could be a way for you to specify their sizes in the picture? Maybe use one of them with confirmed measurements as a silhouette model at the side with a few lines?