Kaori is the only daughter and heiress of the Rokumeikan Enterprise Inc. Ever since childhood, her parents had not been around much, so she was raised and taught by the family's loyal butler Jiiya.

The first person who received the Birdonic Wave and the first female member of the Jetmen. Kaori agreed to join the team without hesitation, wanting to do something more exciting than merely living her idle rich life. She helped Ryu Tendo and Commander Aya Odagiri recruit Raita Oishi when the latter had reservations.

In the final battle, Kaori found out about Ryu's plan to face Radiguet alone to get revenge for Rie. As Red Hawk was being beaten by the villain, White Swan and her teammates came to his rescue. Taking a hit meant for Ryu, she told him that Rie would never have wanted to see her love in a state of despair. She reminded Ryu that he was the leader of the Jetmen, and he had to continue fighting not for vengeance, but for the values he held dear. He regained his composure and returned to the battlefield with her. The five heroes managed to, after a long and grueling fight, destroy Radiguet and end the Vyram threat for good.