For the main character of The Lost Fleet and Beyond the Frontier, see John Geary.

Captain Jane Geary, formerly a commander, is the sister of Captain Michael Geary of Repulse, and the grandniece of legendary fleet commander, John "Black Jack" Geary.

She commands the Alliance battleship Dreadnaught. A command contrary to the prevailing belief that the most skilled officers of the "modern" fleet command battle cruisers, most likely due to the belief that Jane Geary was insufficiently aggressive.

She was first seen in the fifth book, Relentless, commanding the surviving forces of the Alliance in defense of Varandal against the superior forces of the Syndicate Reserve Flotilla until the main forces of the Alliance Fleet arrive to reinforce them.