Ego is exceptionally intelligent, although as its name suggests, it harbors an extreme superiority complex and can be emotional if thwarted. Ego is propelled through space via the engine Galactus implanted on it and can travel at faster than light speeds (for unknown reasons, Ego is unable to remove the powerful propulsion unit placed at its south pole). Ego has total control over its entire mass down to the molecular level; it often shapes its surface into the appearance of a gigantic face to address powerful beings, and can also shape its terrain to suit the circumstances. It is able to use its own substance to extrude tentacles, organic sensors, plant-like growth, and to create humanoid vessels for its consciousness. It can shape its surface to appear as a dead inhospitable world, or into an idyllic, lush green paradise to lure unaware space travelers to its surface, which it promptly consumes. Ego possesses various internal features analogous to a living organism, such as gigantic tunnels that have been compared to arteries, and a gigantic brain-like organ deep below its surface. It can heat up its internal temperature to destroy beings inside it. Ego possesses both digestive organs, which it uses when absorbing living beings, and an immune system with which to create powerful antibodies to destroy beings which resist absorption.