Invincible is a teenage superhero named Mark Grayson. He's the son of Omni-Man and inherits powerful abilities like super strength, speed, flight, and accelerated healing. Despite his powers, Mark struggles with balancing normal life and the overwhelming responsibility of being a hero. His journey is filled with intense battles, moral dilemmas, and personal growth as he learns what it truly means to be a hero in a brutal, often unforgiving world.
Omni-Man, also known as Nolan Grayson, is Mark's father and initially appears to be Earth’s greatest protector. He is a member of the Viltrumite race, a powerful alien species with the goal of conquering and assimilating other worlds. Nolan’s seemingly noble presence hides a darker, imperialistic mission. He’s immensely powerful and ruthless, capable of devastating entire cities single-handedly. His relationship with Mark becomes the emotional and philosophical core of the story as their ideals clash in dramatic, world-shaking ways.