The Hardness Manipulator is a Bio Enhancement used by Agent Frigga of Project Valhalla. It manipulates the hardness of the user, as the name suggests.
Advantages and Disadvantages
The main advantage is that it increases the user's durability to a degree. It grants them resistance to permanent shape changing forces like one of Carolina's punches. This grants the user some form of protection from outside forces. However, Frigga more often uses it to increase the softness of certain parts of her body, something that was suggested to her by Loki.
As it currently stands, there are no known disadvantages of this enhancement.