In the original novel that Rio once read, Aino Felicia was one of the many female leads that eventually ended up in Fade Crest, the main character's harem, just like Kira.
Born into the fox tribe that was almost going extinct in the modern age, Aino Felicia was blessed with a rare class called 'Detective.'
Her ability to detect and extract the truth was beyond compare to anyone's.
Her rare class granted her an insanely powerful perception and intuition; any case she had an eye on would most certainly be solved in just a matter of a few minutes!
Unlike Kira, who was skilled in combat, Aino filled the role of being Fade's personal secretary as she managed all his business and other assets.
She was the one who ran all of Fade's propaganda machines and maintained his public image in the world.
She did such a remarkable job in this aspect that no matter how many horrible things Fade had done; they were all covered up properly or completely erased from public sight.
