Mass manipulation is the ability to alter the physical mass of oneself, either by shrinking or growing to various heights and sizes.
- Sylvia is the only known character to possess this ability.
According to a news report, Sylvia managed to leave an unfathomable wake of destruction following an incident in Brazil, where she is believed to have grown to amazing heights and rampaged through a city. When her life was threatened by Thompson, Sylvia showed that she is able to instantaneously alter her size as she managed to shrink so that she is smaller than a coin. Later, she grew big enough to easily lift a car and crush it with her foot.