Mark Grayson is a teenage superhero who inherited his powers from his alien father, Omni-Man, a former member of the Viltrumite race. He has super strength, speed, flight, durability, and healing and call himself as Invincibl. He wears a blue and yellow costume with a black "i" on the chest and a cape. He is friendly, optimistic, loyal, curious, and adventurous, but also stubborn, impulsive, and naive. He faces many challenges and enemies as he tries to balance his life and his responsibilities.