Ester Ein Astrada

Like Elizabeth, she also pilots the Aurora. She also keeps track on the surrounding waters, whether it be the Earth Forces launching their attack or any other creatures. She is 141 years old. Ester often refers to herself as a Nautical Witch, who fought in a war a long time ago. It is possible she is a gynoid or some other kind of artificial being. In the Japanese anime, her seiyū is Fumiko Orikasa, and her voice actor is Kate Higgins in the English adaptation.

(Source: Wikipedia)