One of the key NPC-characters for the online game UFO Online: Invasion Girl named Catherine. According to legend, she, like most people on the planet, was affected by a virus infection, the strains that circulated aliens during their invasion of Earth. Her mutilated hand, remained with her ​​for life as a reminder of the terrible illness that she was able to overcome. In the case of Catherine, the doctors were not able to defeat the virus, but they were able to "freeze" its spread.