"Agility" Gynoid UTAU unit #9 is one of the many projects Intra co. executed. Her initial purpose was to basically imitate a human well enough to be a housemaid. However, she and gynoid unit #10 were activated a week later than the set date, giving them more time to develop. Those two gynoid units were treated by inserting fake memories into their memory banks and releasing them. Mayu, however, grew aware of that and now knows how to tell between a fake and a true memory. (This storyline may be used or ignored - it's up to the user's decision).