She worked for the Black Organization. Curaçao has color-grapheme synaesthesia, which allows her to associate a color to a concept she must remember such as the names of spies.
Her most prominent ability is to memorize things and associated them with particular shading of colors. In the opening scene of the film, she is seen holding a sliding card holder arranged into five different colors (those of which are the colors that is often seen in Curaçao liquor, her namesake) when she infiltrated the Public Security Bureau Office. The combination of those colors are seen again as the color projected to the sky that is visible from the ferris wheel of Touto Aquarium, which cause Curaçao to slip the name of the NOC agents in front of the Detective Boys on the first time she saw them and still under amnesia
It is implied that when she recovered from the amnesia she also regained her memories from before Rum brainwashed her causing her shift in personality and desire to escape the Black organisation.
