Conquest of the Stepstones After conquering all but two of the islands, Daemon declared himself King of the Stepstones and the Narrow Sea in 109 AC, being crowned by Corlys the Sea Snake.
Daemon Targaryen dies in battle fighting his nephew Aemond.
Vhagar and Aemond are both found dead, while Caraxes survives the fall but dies just a few days later of his wounds. Daemon's body, however, was never found, although he is presumed dead.
The individual known as 'The Mad King' is King Aerys II Targaryen. Through his marriage to sister-wife Queen Rhaella Targaryen, Aerys was the father of Queen Daenerys Targaryen (Emilia Clarke) and her older brothers, Crown Prince Rhaegar Targaryen (Wilf Scolding) and Prince Viserys Targaryen (Harry Lloyd).
No, Daemon Targaryen never becomes king.
This is likely because, in the traditionally patriarchal world of monarchies, a king technically outranks a queen. That's why a woman who marries a king, like Alicent Hightower, is allowed to use the title queen, as she's still, on paper at least, subservient to her king.
Rhaenyra's eleven year-old son, Aegon the Younger, was crowned king, and married to Aegon II's daughter and only remaining child, Jaehaera Targaryen, uniting the claims.
Rhaenyra Targaryen Takes the Iron Throne, but Only For a Moment. While the Green forces were away from King's Landing, they foolishly left the capital sparsely protected. That allowed Rhaenyra and Daemon to easily take the city, where she sat on the Iron Throne for half-a-year.
According to Fire & Blood (the source material for House of the Dragon by George R. R. Martin), Rhaenyra's half-brother Aegon II has her killed and eaten by his dragon.
Prince Viserys Targaryen
In the finale of the first season, Daemon crowns Rhaenyra with her father's crown and she becomes the disputed ruler of the Seven Kingdoms.
Turns out, Rhaenyra and Daemon are endgame, meaning they have a sexually tense relationship, eventually hook up, and get married—which is pretty significant from a power play perspective considering (1) they both want the throne and (2) their Targaryen union is almost sure to guarantee that happens—even though Alicent ...
Martin's Fire & Blood book are accurate, then Daemon will cheat on Rhaenyra with two significant characters in House of the Dragon.
Daemon Targaryen seduced his niece Rhaenyra and then walked away before going through with it. Rhaenrya slept with her bodyguard, King Viserys finally fired Otto Hightower…it was an intense one! The producers break it all down in another Inside The Episode feature.
Daemon never attempts to usurp his brother; he doesn't desire the throne, as he knows the burden that it has placed upon Viserys. We see how the relationship between brothers might turn out with Aemond and Aegon II (Tom Glynn-Carney).
In Fire and Blood by George R.R. Martin, Rhaenyra does indeed take the Iron Throne and become queen over the Seven Kingdoms, however, her reign is short-lived. Given how much House of the Dragon has been diverging from the source material, nothing is really certain about what will make it into the final cut.
Daemon and Prince Aemond Get Into a Huge Fight
According to Fire & Blood (the source material for House of the Dragon), Daemon dies after an epic dragon fight with Prince Aemond... who also dies, womp.
While Daemon and Rhaenyra have been circling each other for quite some time, the finale revealed a darker and more toxic aspect of their relationship when, arguing over how to proceed against Aegon II (Tom Glynn-Carney), Daemon chokes Rhaenyra in order to get his point across.
In the seventh episode of the blockbuster HBO series, Prince Daemon marries his own niece, Princess Rhaenyra.
Soon after being widowed, Daemon and Rhaenyra marry each other in secret when he is 39 years old, and she is 23. Their marriage causes a huge scandal at court and another rift between Daemon and Viserys, but it is eventually accepted. The couple has two sons together, Aegon and Viserys.
In the show, there isn't any romantic love between them. Daemon uses Rhaenyra for her position, and by being the first man to be intimate with her, he ensures that no other man would want to marry her. In the books, however, Rhaenyra was in love with Daemon and had always been besotted with him.
Alas, the baby did not survive and while it wasn't shown very well on camera, there were debates among fans whether the baby was normal-looking or deformed.
Rhaenyra's second son with Prince Daemon would also later rule as King Viserys II Targaryen, as both sons of his brother Aegon III, Daeron I and Baelor I, later died without issue.
After teasing their deep connection for weeks, making out in a brothel, and flirting their way through King's Landing, uncle and niece at long last did the dirty. Not only that, but Rhaenyra and Damon literally had sex on the beach.
During their walk, Joffrey stops at one point to show her the final resting place of Rhaenyra Targaryen, who's now long dead. "Rhaenyra Targaryen was murdered by her brother, or rather his dragon," says Joffrey. "It ate her while her son watched. What's left of her is buried in the crypts right down there."
Rhaenyra, unfortunately, dies a premature death shortly after her brief stint on the Iron Throne. Upon bartering passage back to Dragonstone, she was betrayed by an ally of hers, Ser Alfred Broome.
However, she was confined to her chambers in the last year of her life, and in the books, she goes insane and dies during an outbreak of Winter Fever in 133 AC. Prince Daemon marries Rhaenyra following the death of his second wife, Laena Velaryon, and they have three children.