Stannis Baratheon, Lord of Dragonstone

From Asoiaf

Stannis of House Baratheon is Lord of Dragonstone. He is married to Lady Selyse of House Florent. They have a single daughter, Shireen. Stannis is master of ships on King Robert's small council.

Stannis sailed to Dragonstone with his new-built fleet only to find that Ser Willem Darry had fled with Viserys III Targaryen and Daenerys Targaryen to Braavos