Rhaenyra Targaryen is the half-sister of Daenerys. They share a common father, King Aegon II. Rhaenyra was born to Aegon's first wife and Daenerys to his second wife. Unfortunately, their relationship was cut short by the civil war known as The Dance of Dragons, in which they were on opposite sides; Rhaenyra fought for her claim to the Iron Throne while Daenerys' brother Viserys supported their father's cause. Though neither survived the conflict, their shared bloodline brought them together in life and death - an immortal bond that links two powerful women from different generations.