Glue and paint are going to be your best bets. Maybe match the paint of the sword, if you can. If not, a little silver in there might make it appear like battle wear. Otherwise, maybe keep an eye out for a replacement if anyone is parting the figure out.I feel so sad that my Cloud's pauldron suddenly loosen and dropped off.. and I also accidentally scratched my buster sword... Any good advices to fix these problems?
The last photo was the picture before the pauldron dropped off...
For glue, I’ve had the best luck with Loctite super glue gel.