A robotic schoolgirl that was built by a Professor. She often worries about keeping her identity as a robot from others, despite the fact everyone already knows about it due to the noticeable wind-up key exposed on her back. Luckily most don't make a big fuss about it.

Her limbs will sometimes fall apart, revealing dubious items that Professor has installed without her noticing, ranging from bean-firing-weapons to Swiss rolls. She is also the Professor's caretaker.

She wishes to live life as a normal girl and therefore really wants the wind-up key on her back removed.