Galactus is a powerful cosmic being in the Marvel Comics universe, often referred to as the "Devourer of Worlds." He travels through space, consuming entire planets to sustain his life force. Galactus is not just a villain; he has a complex nature and is sometimes portrayed as a force of balance in the universe. To assist him in his quest, Galactus creates powerful beings known as Heralds, the most famous being Silver Surfer. These Heralds help him find suitable planets to consume, often leading to conflicts with superheroes like the Fantastic Four and Avengers. Galactus embodies the idea of a force beyond good and evil, making him a unique character in comic lore.