So a standard super glue would be fine? There's no special brand or type I would need to fix it?
Don't worry too much about it. Things like this are amongst the easiest fixes you'll have to face with these figs. The magnets didn't come off of my Luke yet, but they did on my Joker. A fast drying super glue will work perfectly. You'll see a bunch of different brands in any art store, hobby store or Home Depot. For simple stuff like this, all the better ones will work equally. But definitely use a toothpick as others are saying, NEVER apply the glue straight fom the tube to the surface. Squeeze a drop on a piece of paper, dip a toothpick in that and dab it on the surface of what your gluing.