>>10573393DAMMIT!
It felt like her should was going to be similar to TP Link or Zelda; where it's a ball joint peg into a ball joint peg that can be pulled out or pushed in. She does have something similar to that, but it's attached to a horizontal hinge inside the chest.
It doesn't look like it broke, so much as a piece that was meant to be glued in detached. You can see a tab on the should peg joint and a matching slot inside the body.