The monster defeated by Perseus in Greek mythology is the Griffin. However, it is more commonly associated with the slain Medusa. Medusa, a Gorgon with snakes for hair, could turn onlookers to stone. Perseus, armed with a mirrored shield from Athena and the winged sandals of Hermes, beheads her, an act symbolizing triumph over fear and chaos. Medusa's death leads to the birth of Pegasus, emphasizing the themes of rebirth from destruction. Perseus's victory highlights the heroic qualities celebrated in Greek myths, such as bravery, cleverness, and divine assistance.