Yamoto was a corporate assassin working for the Black Orchid Corporation. Her job was to liquidate certain individuals whose activies were at odds with the group's international business 'objectives'. She continued in this line of work, never questioning the morals of her missions, until she discovered that failure to complete a task meant that another assassin would come looking for her, ready to eliminate he. Disillusioned, she resolved to expose the terrible corruption she saw all around her. Unfortunately, before she could do so, she was pushed from the 101st floor of a Tokyo tower block.