Warning: This article contains major spoilers for the "House of the Dragon" Season 3 finale. Ever since her first appearance in Season 2, the identity and motivations of Alys Rivers (Gayle Rankin) has remained in doubt. But, thankfully, the mysterious Alys has finally dropped all pretenses and given us some major clues into her real identity. She tells the tale of how Harrenhal ended up the way it did at the hands (er, wings) of the dragon Balerion and its rider, Aegon the Conqueror. Yes, Alys appears to be that same mother, somehow cursed to linger on 100 years later in Harrenhal.