House of the Dragon: who did Rhaenyra kill? It's the man she spared in season 1

The victim: Otto Hightower (Rhys Ifans), former Hand of the King, chief architect of Aegon's coup — and the very man Rhaenyra refused to let Daemon kill in the season 1 finale.

The execution in brief

• The victim — Otto Hightower, beheaded in the Red Keep's throne room for treason.
• The executioner — Rhaenyra herself, swinging Daemon's Valyrian steel sword, Dark Sister.
• The catch — never trained with a blade, she needed two blows; the first struck his back.
• The book difference — in Fire & Blood, Rhaenyra only orders Otto's death. The show puts the sword in her hand.

How it happened

Reeling from the death of her son Jacaerys at the Battle of the Gullet, Rhaenyra takes King's Landing almost bloodlessly — Alicent keeps her promise and opens the gates. But Aegon has already fled the city with Larys Strong, robbing the new queen of her usurper. Larys did leave a parting gift: Otto, secretly locked in the Black Cells since season 2. Daemon hauls him into the throne room, hands Rhaenyra his sword, and presses her to do what a ruler must:

"If you wish to rule, show them you do not waver."

"I don't know if I can," she answers. Then she does — badly, which is the point. The same hour, Daemon beheads Jasper "Ironrod" Wylde with one clean stroke, and the contrast only makes Rhaenyra's botched swing land harder.

The man she spared in season 1

The echo is deliberate. In the season 1 finale, Otto sailed to Dragonstone carrying Aegon's terms; Daemon was ready to kill him on the spot, and Rhaenyra refused — partly out of lingering loyalty to Alicent, partly because she would not open her claim with an execution.

Season 3 completes the reversal: the same three people in the room, and this time the sword falls. Alicent, who brokered the city's peaceful surrender, comes upon her father's headless body only moments later.

What it means for Rhaenyra

It's her first personal kill, and the show made it deliberately ugly.

In the official Inside the Episode featurette, writer Sara Hess explained that the team wanted to honour the fact that Rhaenyra had never been trained with a sword — and that this, possibly more than losing Jace, is the moment she understands what sitting the Iron Throne actually costs.

Showrunner Ryan Condal went further, saying the Rhaenyra viewers knew is gone from the moment Otto's head leaves his body. The episode's final image agrees: she climbs the steps of the throne tracking his blood behind her.