Who is She?

Kids, teenagers, adults are being taken hostage to use for experiments. Most of them died because their body can't handle the sedatives being injected to their body, but among them, one didn't die. She's a successful experiment. She become so strong, gained powers, her wounds would heal, almost immortal, but she is being control by the scientists. The scientists thought that they were also able to control her. But they were wrong. One night she broke out from the lab and planned to take revenge someday.