Resin figures or figurines are pretty tough but when they break there are not many things that will put them back together. You can use an epoxy sometimes but because of their thickness you can usually see the joint or seam where the two pieces have been put together. Super glue will sometimes work but it discolors and the bond is not always permanent. It also dries out in the tube or bottle so no matter what you pay it is generally a one shot deal.
As resin adhesives go Mister Glue is one of the best. The tighter the bond with Mister Glue the better so if you get the two pieces matched up properly the seam is all but invisible. It takes seconds to set as well so you aren’t sitting there for half an hour waiting for it to set.
Sometimes resin will ‘bend’ a bit when it breaks. This makes it so that the fit is not perfect which is the best way repair resin with Mister Glue. But there is a way around this. Glue the two pieces together as above then you may be left with a little space that needs a resin filler. Take a tiny bit of baking powder and put it in the space left. Put a drop of glue on it and it will harden in a second or two – pretty much immediately. Use very little glue – you may want to use a pin or toothpick to transfer from the bottle tip to the powder. Once this has cured a bit then you can sand or file to the shape that you want. Paint over it and you are done.