House of the Dragon Is About to Introduce a Whole New Set of Pivotal Characters in Game of Thrones History

Aegon II Targaryen

As you can see, King Viserys I and Queen Alicent Hightower's firstborn son will be coming of age in the time period of Episode 6. Aegon II is the biggest challenge to Rhaenyra's claim to the throne, and it's clear that House Hightower wants to instill the hunger for rule inside of him. Footage hints that Aegon will not be friendly with the children of his half-sister. Aegon II is one of the most significant figures in the history of Westeros and the Targaryen Dynasty.

Aemond Targaryen

King Viserys I and Queen Alicent's second-born son is a close ally with his brother Aegon II and has a significant role in the history of Westeros and the Targaryen family, as well. The trailer teases that Aemond will have a literal trial by fire, presumably trying to bond with his dragon at a young age.

Helaena Targaryen

King Viserys and Alicent's third child is a daughter, Helaena. It's hard to keep track of the babies that Alicent's been holding, but by Episode 6 of House of the Dragon, she'll also be part of Aegon II's side of things. Helaena also has a larger role to come in the history of Game of Thrones. The character's portrayal will be split between actresses Evie Allen (young), and Phia Saban (Older).

Jacaerys Velaryon

Princess Rhaenyra's first-born son Jacaerys is seen as a young boy learning the ways of the Targaryens – including getting a dragon to spew fire with the classic line "Dracarys!" Obviously, with Aegon II and Aemond coming of age first, Rhaenyra's son will grow into manhood with a target on his back.

Lucerys Velaryon

Princess Rhaenyra's second-born son Lucerys "Luke" Velaryon is one of the most pivotal characters in this era of the Targaryen saga. He's spotted briefly here at a young age, training with his brother Jacaerys and half-brothers Aegon II and Aemond. Clearly Luke will learn early on just how brutal the exploding tensions within the family can get.

Joffrey Velaryon

Rhaenyra's youngest son is the baby she's seen holding. We all know just what a loaded name "Joffrey" is in Game of Thrones. Will "Joff" Velaryon be as infamous as Joffrey Baratheon in Game of Thrones? Not yet, at least...

Lady Baela Targaryen

Daemon and Lady Laena Velaryon's eldest daughter looks like she's already learning the secret of hatching dragons from her daddy, Daemon.

Lady Rhaena Targaryen

Daemon and Laena's Youngest daughter is still in the womb when seen here. But she'll be part of the generation of kids all vying for the throne of Westeros, soon enough.

Ser Harwin "Breakbones" Strong

While he has been part of the show, Ser Harwin "Breakbones" Strong is clearly about to become a more relevant character in the story, as he's featured prominently in the footage, taking some pretty drastic action. One of the sons of Hand of the King Lyonel Strong, and brother to the slithery Larys Strong, who is already been seen whispering in Queen Alicent's ear.

House of the Dragon airs Sundays on HBO and HBO Max.