you are right so i glue it with a mix of superglue and neoprene glue (like pattex) and i cover all the surface with a glue-varnish. When it' dry, the objet is hard and it's no more flexible.
For a flying cloak in the wind , you shall be more cautious. I use paper clip cut and it wrap into the cloak, drill and glue into the figurine.