Jay

Jay is an experiment that escaped a lab many years ago. He can become a monstrous shadow creature, disrupt electrical flows, and regenerate within minutes. When he returned to the lab he was made in, he slaughtered hundreds of scientists, but sadly, almost every experiment had been terminated before he could save them. Only one survived. The survivor was just a child, and Jay decided to take them in as their adopted kid. It's been 10 years since that day.