The Hidden Family Secret (The Guardian Chronicles)

Leo and his sister Bella live in a slum neighborhood with their brother, Caleb, after a fire almost kills them. There parents escaped the fire and left them for dead. Leo, Bella and Anna were born with powers that they have yet to learn about which could help save people on and off their world. They meet others like them but are different in some ways. Some people they didn't think would have powers. They have yet to learn the secrets that happen around the world that has been shielded from their very eyes.