Ser Erryk Cargyll was a knight of the Kingsguard and the twin brother of Ser Arryk Cargyll. Appearing in House of the Dragon, he served King Viserys I and was sworn shield to the young Prince Aegon before the king's death.
Disillusioned by the Greens' seizure of the throne, Erryk stole King Viserys's crown and carried it to Dragonstone, joining Rhaenyra Targaryen's Queensguard. During the ensuing Dance of the Dragons he was forced to fight his own twin, whom he killed before taking his own life in grief. See the Timeline for a chronological account.
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