Siren is a Guardian Force (GF) in Final Fantasy VIII, a summonable entity that assists the main characters in battle. She takes the form of a beautiful, ethereal woman with wings and harp, inspired by mythological sirens. Siren's primary ability, 'Silent Voice,' inflicts silence on enemies, preventing them from casting magic. As a non-human character, Siren doesn't participate in the story as a person but plays a key role in the game's combat strategy and the junction system.