All season long, Helaena, who was pregnant, was basically a prisoner of her half-sister, Queen Rhaenyra Targaryen (Emma D’Arcy). 16 Phia Saban’s Helaena Targaryen (pictured) died by apparent suicide in the Season 3 finale of “House of the Dragon.” 16 Emma D’Arcy’s Queen Rhaenyra Targaryen (pictured here) essentially kept Helaena as her prisoner. 16 Heleana could see the future, and stitched embroidery of Rhaenyra (pictured here) surrounded by flames on the Iron Throne. 16 In “House of the Dragon,” Rhaenyra (pictured) is embroiled in a civil war with her siblings over who is the rightful monarch.