|“||I am a fly in the ointment. I am a whisper in the shadows. I am also an old, old woman. More than that you need not know.||„|
|~ Flemeth describing herself.|
Flemeth was born in Highever centuries before the Dragon Age and became wife of Lord Connobar. After he betrayed her and proved to have no honor, she was jailed by him. Flemeth asked and prayed for help and Mythal, having been betrayed and murdered herself millennia before, heard this and possessed her, giving her unimaginable powers. Flemeth escaped Connobar and when he sent his army to chase her she defeated him. In later centuries she became known as a Witch of the Wilds. Considered overall to be a frightening and malevolent presence, she occasionally "nudged history" by helping certain people she thought would become important, the earliest known instance being the future king Calenhad. In the late Blessed Age, Flemeth encountered Prince Maric Theirin and told him several prophecies, including that there would be a Blight he would not live to see and that Loghain Mac Tir would betray him. She agreed to help him in exchange for a promise that once he had children he would seek out her daughter Yavana for a task regarding the apparent dragon blood in Maric's veins.
Early in the Dragon Age, Flemeth has a daughter named Morrigan and they live in isolation in the Wilds. When Morrigan is an adult, a Blight begins and they meet two Grey Wardens, the future Hero of Ferelden and Alistair Theirin. After Loghain quits the field during the Battle of Ostagar, leaving the king and army to die, Flemeth rescues the Hero of Ferelden and Alistair and sends them off to defeat the Blight, forcing Morrigan to accompany them. She secretly tasks Morrigan with convincing the Hero of Ferelden to perform a blood magic ritual before the final fight with the Archdemon. During the ritual Morrigan would become pregnant and when a Warden killed the Archdemon, instead of its soul (and the Warden) being destroyed, the untained soul of the Old God would enter the unborn child, thus preserving it.
While traveling with the Wardens, Morrigan reads Flemeth's Grimoire and discovers Flemeth's secret to immortality is taking over the bodies of her daughters. To prevent this from happening to her, Morrigan enlists the Hero of Ferelden to kill Flemeth. Flemeth offers to disappear for a time as an alternative to fighting the Hero, but if the offer is refused she turns into a dragon, attacked, and is apparently killed. Later, if the Warden agrees to the ritual, Morrigan becomes pregnant and leaves, taking refuge in the Crossroads as she does not believe Flemeth will remain dead.
Also around the beginning of the Blight, Flemeth saves the future Champion of Kirkwall, Hawke, and their family from darkspawn. In return for Hawke delivering an amulet to a Dalish Keeper, she agrees to take them away from the Blight. When Hawke returns the amulet, it is revealed a part of Flemeth had been stored in the amulet as a safeguard in case Morrigan attempted to kill her.
During the events of Dragon Age: Inquisition, Morrigan or the Inquisitor drink from the Well of Sorrows and is thus bound to the will of Mythal. Flemeth, who unbeknownst to Morrigan or the Inquisitor carries Mythal inside of her, is able to finally locate Morrigan and, if the dark ritual was performed, her son Kieran. She confronts Morrigan and the Inquisitor and reveals her connection to Mythal, claiming she is seeking vengeance and a reckoning for the betrayal Mythal suffered. Contrary to what Morrigan anticipates, Flemeth does not attempt to possess Morrigan or her son, although she does take the Old God soul from Kieran without harming him. Before she leaves, she says that a soul is not forced upon the unwilling and that Morrigan was never in danger from her.
After Corypheus' defeat, Flemeth sends some unknown magic through an eluvian before meeting with Solas in the Crossroads. Solas, an old friend of Mythal, apologizes for his carelessness with his orb and says that while he's willing to pay the price, the elves need him. He then takes the power from her, apparently killing her, but whether or not she allowed him to take it and is truly dead is unclear.