Karen is the crew's expert in long-distance shooting and is often seen with a rifle on the battlefield. Often her features are calm and composed, and she has long pale blonde hair.
She is half African-American and Japanese. Her father abandoned her and her mother when Karen was still young, creating a wound that would fester into a deep hatred of men. However, that hatred begins to alleviate due to her friendship with the other members of the A.D. Police.