Fabien Frankel began his time as Ser Criston Cole on “House of the Dragon” as a valiant knight who saves Princess Rhaenyra (then played by Milly Alcock) from a wild boar and dutifully fulfills his role as her sworn protector. However, everything changed after he and Rhaenyra slept together and he confessed the act to Queen Alicent (then played by Emily Carey) and went on to commit a brutal murder. For his part, Frankel is very well aware of how unlikable his character has become. In an…