But as I told you before, what the cmc does is absorb moisture and make the fondant harden. So the fondant decoration or figure will be hard. This will make it quite difficult to eat.
If the cake is for a client, it is advisable that you always notify him of some factors that he must take into account, such as: if the figures have sharp elements inside (skewers or toothpicks), if the cake should be refrigerated and how to store it.
And from my point of view, I would add that you can eat the figure, but that it will be hard, so it is possible to hurt your teeth or molars. I have never tried to bite it, but I suppose it will resemble those sugar figures that are sold ready-made and that are usually used in some more classic or traditional cakes.