Onikirimaru, Kaguya

In the manga, Kaguya is Yurika's childhood rival. Daugther of Asuka Industry Co. Ltd.'s president, she is a UNSF officer (serial number B-245-K3449) and captain of the Nadesico's sister ship, the Kaguya. Yes, the ship was named after its captain.

Kaguya's sole mission in life is the complete and utter destruction of Yurika.