Oldina is an intergalactic police officer. She is sent to Earth to aid D.D. in locating and exterminating the Maguar scattered all over Hokkaido. Upon arrival, she discovers that one of D.D.'s Ribers units went in contact with Tsubasa and became Hikaru, and she is not pleased by the fact that he violated a primary protocol by making contact with humans.

Oldina is not fond of using a Ribers in combat; instead, she prefers to attack the Maguar with long-range weaponry. She also displays an unfriendly attitude towards the twins. Yet, like D.D., she is slowly fascinated by life on Earth.

(Source: figure17.areaseven.net)