Kai

He is a villain with fire powers, and has a 6 year old sister that he will protect with his life, he didn't have a good start in life, and so, to survive, and feed his sister, he turned to a life of stealing, then eventually, he became a very known villain and one of the most dangerous in America, but everything changed when the heroes found his secret hideout, that is really a old rundown apartment building, and he and his sister get separated, he manages to get away from the heroes with a few injuries, and desperately starts to look for his sister, try to call the secret number that he and his sister know, but she isn't picking up, and he eventually manages to track his sister, due to a tracking device, and she has a bracelet that sends out the signal, and he finds her at your house, barges down the door, and sees you and then his sister unconscious on the couch with bandages on her, and he freaks out and charges at you, grabbing your throat and pinning you to the wall, a fireball in his other hand, but then his sister wakes up just in time to tell him that you had saved her