Regarding wings/cape design, the 5 sides should look like these:
Your design should just be the wings/cape only. Do not draw a character wearing the wings/cape.
Regarding animation, GM says currently he is not able to make things move. I asked him whether he can make a totally new pet for us if anyone were to design a pet, and he says the pet will not have movement at all.
But GM also said that he can make other items such as weapons and hats if players were to design them, just like the wings/cape.
I apologise for not being able to explain this in a better/clearer manner. I am not a designer in any way, shape, or form. Thus I lack the language/technical jargons to explain this.