Phia Saban in 'House of the Dragon' Ollie Upton/HBOGold Derby: What was your reaction when you learned Helaena’s fate? But that dynamic with Rhaenyra is really juicy because it’s something I’ve always kept in mind for Helaena all three seasons. Phia Saban and Olivia Cooke in 'House of the Dragon' HBOHelaena confronts Alicent (Olivia Cooke) about being forced to marry her brother. I think Helaena starts seeing that Alicent is very much in a phase of her life where she’s reflecting on things like, “What could I have done differently? Helaena feels a lot of love and sensitivity toward that, but also rightly is feeling existential, and is like, “Did you do this to me?”