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You are now aware that that collar likely weighs in the vicinity of 80 pounds. Based on her frame and its position at the top of her mass, the weight has resulted in immense compensation in her musculature. She could snap any of us in half. With her neck.
I have no idea what she's from, or what in-universe superpowers she has. I'm just going off an image from this thread I saw on the frontpage, and thus have based this off normal human characteristics.