Dread Captain DeMeza

Dread Captain DeMeza is a level 70 elite human female pirate that appears on the roof of the Booty Bay bank the 19th of September along with her crew, as a part of the Pirates' Day celebration.

She can give you a buff that turns you into a pirate of your race for 12 hours.

Quotes

 * Ye've got some stones comin' up here, . It's Pirate's Day, ye know... and 'til the sun rises on the morrow, Booty Bay is MINE.
 * So! What do ye say? Raise a drink ta me and me crew, and join the celebration?

Trivia
Her last name DeMeza was the one of Kristen Dipswitch before Patch 2.4.3. Also this may be a reference to the character "Dread Pirate Roberts" portrayed in the movie "The Princess Bride" who teaches a new-comer to be a pirate.