From A Wiki of Ice and Fire
Lady of Storm's End
|Allegiance|| House Durrendon|
|Book(s)||A Game of Thrones (Mentioned)|
After her father was slain by Orys Baratheon in a battle that would be called "the Last Storm", Argella locked herself inside Storm's End declared herself Storm Queen. However, her garrison refused to share the fate of King Argilac and revolted, delivering her to Orys naked and chained. Orys, however, removed the chains and gave her his cloak as well as food and wine.
She was later married to Orys to cement the latter's rule over the Stormlands.