Ao Nekogahora serves as a central figure within the "Rebirth" card game narrative, defined by distinctive traits. Her appearance features long, wavy ice-blue hair, often clipped back on the right side to reveal her face, paired with striking cobalt-blue eyes.

Intelligent and reserved, she possesses a deep curiosity and intense passion for research and experimentation. Her focus lies exclusively on unexplored or unknown subjects, while she actively avoids anything hindering her scientific inquiries. This single-minded dedication earned her the nickname "Blue Mad Scientist."

Her card game ability allows her to select an opponent's member card and move it to the waiting room, triggered when three or more cards are present collectively in her own member and retire areas during play. In the anime adaptation, she functions in a supporting role.