I watched the animation video and got an idea; How about as described in the title would it be possible to do something like this?
I imagine it like this:
- EARS, just tilting them backwards is only half right, you could emulate them so that the character can "put them on" or "right them up" correctly, depending on the emotions.
- NOSES that sniff the nostrils up and down, wiggle
- SCALES, a dragon shaking his scales (See "toothless")
I would like to offer myself there at times, I would find it extremely exciting to tinker with something like that. Could this be implemented in the app; and how would it be selectable in the respective mode?