Water Mimicry

Donald Essex (Heroes)
Donald Essex has displayed the ability to turn himself into water. With this ability, he was able to survive Perrin Crocker's bone spikes by turning his chest into water. When he transforms his arms into water, he can generate more water from his arms and fire them at people. After he was subdued by Nathan's agent, his entire body begins dissolving into water, which is eventually dumped into the Mississippi River.

Elisa (Heroes)
Elisa has the ability to turn herself into water. She has demonstrated this ability multiple times so far, melting into a puddle of water, as well as using her ability to travel long distances and then re-materializing in human form. Items, such as her clothes and a syringe, appear to turn into water along with her.