My OC: Claire AKA Kribbit
Her weakness: Tied to her strength. If she tries to lift more than she can her powers will cancel out, making her mortal. So throw a semi at her and it would probably kill her if it weighs over 5 tons. However she would likely jump out of the way : )
Even with her durability she can be knocked around. She would not just tank bullets, she would fall if hit, just not be killed. Because like a frog her body temp is like outside temp, a freeze gun would freeze her solid. Although it would not kill her (that's how some frogs hibernate) it would definitely put her down till she thawed out. Suffocation could kill her if someone was strong enough to actually choke her.