(Voiced by Tawny Newsome).
Ensign Beckett Mariner served in the command division of the U.S.S. Cerritos in 2380. She had previously served with five other ships, including the U.S.S. Quito while it made first contact with the Galardonians, before she was demoted and transferred to the Cerritos. Captain Freeman, who commanded the Cerritos, was also her mother - but the two of them kept that secret from the crew.